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Permit PL14-0029 - CITY OF TUKWILA / CYNDY KNIGHTON - GILLIAM CREEK CULVERT REPLACEMENT SEPA
GILLIAM CREEK CULVERT REPLACEMENT 40TH - 42ND AVE S SOUTHCENTER BLVD - S 160TH ST PL14-0029 E14-0010 - SEPA C K LST E14-0010 SEPA CHECKLIST City of Tukwila Department of Community Development Jim Haggerton, Mayor DETERMINATION OF NON -SIGNIFICANCE (DNS) File Number: Applied: Issue Date: Status: E14-0010 July 7, 2014 October 20, 2014 Determination of Non -Significance Jack Pace, Director Applicant: Cyndy Knighton, Senior Program Mgr. Lead Agency: City of Tukwila Description of Proposal: A road widening project on 42nd Avenue South from Southcenter Blvd. south to S. 160d' Street. The road widening project includes: asphalt overlay and replacement, curb, gutter, bike lane/sharrow, sidewalks, lighting, storm drainage facilities, utility relocation and replacement of a 92 -foot long, 3 -foot diameter non -fish passable concrete culvert with a 146 -foot long, 16 -foot wide by 8 -foot, 4 - inch rise single radius, corrugated metal, fish passable culvert. Both the north and southbound lanes of 42nd Avenue South will be widened to provide shared lanes for vehicles and bicycles and sidewalks. Final landscaping to mitigate work in the Gilliam Creek stream buffer has not been completed — as a result, a Special Permission, Director permit will be required to establish the landscaping that will be planted. In addition, there will be some trees removed along 42i1 Avenue South that are located in steep slope areas — the replacement of these trees will also be addressed under the Special Permission permit. The Special Permission permit is an administrative decision by the Director of the Department of Community Development. Location of Proposal: Address: Parcel Numbers: Section/Township/Range: 42nd Avenue South between Southcenter Blvd. and S. 160' St. Public Right of Way SE and SW 22-23-04; NE 27-23-04 The City has determined that the proposal does not have a probable significant adverse impact on the environment. An environmental impact statement (EIS) is not required under RCW 43.21c.030(2) (c). This decision was made after review of a completed environmental checklist and other information on file with the lead agency. This information is available to the public on request. Appeals must be filed by Monday, November 3, 2014. The lead agency will not act on this proposal for 14 days from the date below. For a copy of the appeal procedures, contact the City of Tukwila Department of Community Development. Any appeal shall be linked to a specific governmental action. The State Environmental Policy Act is not intended to create a cause of action unrelated to a specific governmental action. Appeals of environmental determinations shall be commenced within the time period to appeal the governmental action that is subject to environmental review. (RCW 43.21C.075) CL: Page 1 of 2 H:\\ 42nd Ave. S. Road Widening & Culvert Replacement Project\E14-0010 DNS NOD 10/20/2014 11:50 AM 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone 206-431-3670 • Fax 206-431-3665 42' Avenue South Road Widening a. Notice of Decision E14-0010 October 20, 2014 ;ulvert Replacement Project The project planner is Carol Lumb, who may be contacted at (206) 431-3661 for further information. Project materials including the application, any staff reports, and other studies related to the permits are available for inspection at: Tukwila Department of Community Development 6300 Southcenter Blvd., Suite 100 Tukwila, WA 98188 Monday through Friday 8:30 a.m. - 5:00 p.m. Jack i,' ace, Responsible Official City of Tukwila 6300 Southcenter Blvd Tukwila, WA 98188 (206)431-3670 0(7a c O 4 - Date cc: Cyndy Knighton, Tukwila Dept. of Public Works, applicant Jeremy Tyndall Muckleshoot Indian Tribe, ATTN: Karen Walter State Department of Ecology, SEPA Division — via email Washington State Department of Fish and Wildlife: ATTN: Larry Fisher CL: Page 2 of 2 10/20/2014 11:50 AM H:A\42nd Ave. S. Road Widening & Culvert Replacement Project\\E14-0010 DNS NOD f 1 City of Tukwila Jim Haggerton, Mayor Department of Community Development Jack Pace, Director FINAL STAFF EVALUATION FOR ENVIRONMENTAL CHECKLIST File No: E14-0010 I. SUMMARY OF PROPOSED ACTION A road widening project on 42nd Avenue South from Southcenter Blvd. south to S. 160t1i Street. The road widening project includes: asphalt overlay and replacement, curb, gutter, bike lane/sharrow, sidewalks, lighting, storm drainage facilities, utility relocation and replacement of a 92 -foot long, 3 -foot diameter non -fish passable concrete culvert with a 146 -foot long, 16 -foot wide by 8 -foot, 4 -inch rise single radius, corrugated metal, fish passable culvert. Both the north and southbound lanes of 42nd Avenue South will be widened to provide shared lanes for vehicles and bicycles and sidewalks. Final landscaping to mitigate work in the Gilliam Creek stream buffer has not been completed — as a result, a Special Permission, Director permit will be required to establish the landscaping that will be planted. In addition, there will be some trees removed along 42nd Avenue South that are located in steep slope areas — the replacement of these trees will also be addressed under the Special Permission permit. The Special Permission permit is an administrative decision by the Director of the Department of Community Development. II. GENERAL INFORMATION Project Name: Gilliam Creek Culvert Replacement and 42nd Ave. South Street Improvements Applicant: City of Tukwila Public Works Department Location: 42nd Avenue South between Southcenter Blvd. and S. 160th Street Zoning and Comprehensive Plan Designation: Low, Medium and High Density Residential (LDR, MDR and HDR) The following information was considered as part of review of this application. 1. SEPA Checklist and ESA screening checklist dated March 20, 2014. / S`Z 2. 30% and 60% Project Drawings prepared by CH2M Hill Engineers, dated August 19, 2014. 3. Section 7 ESA Consultation, prepared by CH2M Hill Engineers, dated June 20, 2014. 4. Archaeological Investigation, prepared by CH2M Hill Engineers, dated June 12, 2014. 5. Wetland and Jurisdictional Ditch Assessment for Gilliam Creek Culvert Replacement at 42nd Ave. S., prepared by CH2M Hill Engineers, dated June 19, 2014. /j//F-0 4/// 6. 42nd Ave. S. Project, Stormwater Design Criteria and Stormwater Management Concept, prepared by CH2M Hill Engineers, March 5, 2013. 7. 42nd Ave. S. Project, Gilliam Creek Culvert Replacement Basis of Design, prepared by CH2M Hill CL Page 1 of 7 H:\EI4-0010 Gilliam Creek Culvert Replacement\Staff Rpt. 10/20/2014 10:32 AM 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone 206-431-3670 • Fax 206-431-3665 E14-0010: SEPA Staff Report 42' Ave. South Road Widening and Culvert Replacement Project October 20, 2014 Engineers, dated March 5, 2013. NOTE: Technical reports and attachments referenced above may not be attached to all copies of this decision. Copies of exhibits, reports, attachments, or other documents may be reviewed and/or obtained by contacting Carol Lumb, Senior Planner, 6300 Southcenter Boulevard, Tukwila, Washington, 98188, telephone 206-431-3661. III. REVIEW PROCESS The proposed action is subject to State Environmental Policy Act (SEPA) review as the project does not meet the exemptions listed under WAC 197-11-800. IV. BACKGROUND/PROPOSAL The project includes the replacement of a non -fish passable, 92 -foot long, 3 -foot diameter concrete culvert with a 146 -foot long, 16 -foot wide by 8 -foot, 4 -inch rise single radius, corrugated metal pipe (CMP), fish passable culvert, which will be constructed as part of the 42nd Avenue S road widening project. Construction of the road widening project would occur from Southcenter Boulevard to S 160th Street. The Gilliam Creek limits are assumed to extend approximately 200 feet upstream and downstream of the existing culvert under 42nd Avenue S. The proposed culvert location would be shifted approximately 17 feet south of the existing culvert to minimize impacts to an existing rockery wall on the north side of the existing culvert inlet, and the very large boulders on the north side of the existing culvert outlet. Approximately 25 feet of upstream channel and 50 feet of downstream channel will be reconstructed because of the shifted position of the new culvert. The new culvert would have a slope of 3.8 percent. The multi -plate CMP culvert would be supported by concrete footings that will be 2 feet square and 2 feet deep. The footings were sized to provide adequate support to the load from the soil on top of the culvert, and deep enough to protect the footings from being undermined by the stream flow. The existing bankfull width downstream of the culvert was measured at about 11.5 feet. The proposed culvert bed width would be about 16 feet wide under the new culvert. Construction of the road widening project includes asphalt overlay and replacement, curb, gutter, bike lane/sharrow, sidewalks, lighting, storm drainage facilities, and utility relocations as well as the culvert replacement described above. Both northbound and southbound lanes of 42nd Avenue S will be widened to provide shared lanes for vehicles and bicycles. Both sides of the roadway would have new curbs and gutters and sidewalks with a minimum width of 5 feet. A new storm drain collection, conveyance, treatment and flow control system is proposed. Stormwater treatment consisting of either a pond or vault would be constructed within City owned property. CL Page2of7 H:AE14-010 Gilliam Creek Culvert Replacement\Staff Rpt. 10/20/2014 10:32 AM f \ f 1 E14-0010: SEPA Staff Report ` �J 42nd Ave. South Road Widening and Culvert Replacement Project October 20, 2014 Stormwater pretreatment units are proposed to provide some water quality treatment prior to discharge of stormwater runoff to Gilliam Creek. The proposed conveyance and detention system include an outfall to Gilliam Creek. The existing roadside ditches on the southeast and southwest sides of 42nd Avenue S will be filled and the existing stormwater flows will be piped. The existing stormwater flow pattern will not be altered. The road widening project will require the relocation of existing utility lines located within 42nd Avenue S. V. REVIEW OF THE ENVIRONMENTAL CHECKLIST The following lists the elements contained within the Environmental Checklist submitted for the proposed project. The numbers in the staff evaluation correspond to the numbers in the Environmental Checklist. If staff concurs with the applicant's response, this is so stated. If the response to a particular item in the checklist is found to be inadequate or clarification is needed, there is additional staff comment and evaluation. A. BACKGROUND: 1-5 Concur with checklist 6 The project construction phase has been postponed to 2016. 7-12 Concur with checklist. B. ENVIRONMENTAL ELEMENTS: 1. Earth: a -h-- Concur with checklist. 2. Air: a -c– Concur with checklist. 3. Water: a(1)-a(6)—Concur with checklist. b(1) and (2) -- Concur with checklist. c (1) and (2) Concur with checklist d – Concur with checklist. 4. Plants: a. Concur with checklist. b. Some trees will be removed from sloped areas along the roadway that fall under the jurisdiction of the City's Sensitive Areas Ordinance. TMC 18.45.130 C.2. requires the CL Page3of7 H:\E14-010 Gilliam Creek Culvert Replacement\Staff Rpt. 10/20/2014 10:32 AM E14-0010: SEPA Staff Report 42' Ave. South Road Widening and Culvert Replacement Project October 20, 2014 replacement of trees removed from steep slope areas. A Special Permission, Director, permit will be submitted in the future, prior to the start of construction, for the landscaping required in the area of the new culvert. The replacement trees for trees removed from the steep slope areas will be addressed at this time. c. Concur with checklist. d -Landscaping will be provided in the Gilliam Creek stream buffer area of the culvert replacement, and replacement trees will be required for trees along the road that fall within the steep sloped mapped areas of the Sensitive Areas Ordinance. 5. Animals: a-c—Concur with checklist. d – The site is also along the Pacific Flyway, a migratory bird route. 6. Energy and Natural Resources: a -c -- Concur with checklist. 7. Environmental Health: a –b —Concur with checklist. 8. Land and Shoreline Use: a-1 Concur with checklist. 9. Housing: a -c— Concur with checklist. 10. Aesthetics: a-c—Concur with checklist. 11. Light and Glare: a -d -- Concur with checklist. 12. Recreation: a -c – Concur with checklist. 13. Historic and Cultural Preservation: a -c – Concur with checklist. 14. Transportation: a. Concur with checklist b. The F Rapid Ride line also runs on Southcenter Blvd., with a transit stop located about 200 ft. to the west of the project. c. -g. Concur with checklist. CL Page4of7 H:\E14-010 Gilliam Creek Culvert Replacement\Staff Rpt. 10/20/2014 10:32 AM i'\ E14-0010: SEPA Staff Report 42"d Ave. South Road Widening and Culvert Replacement Project October 20, 2014 15. Public Services: a -b -- Concur with checklist. 16. Utilities: a -b -- Concur with checklist. IV. COMMENTS: The City received questions from the Muckleshoot Indian Tribe regarding the project and questions/comments from a resident, Jeremy Tyndall who lives along the street to be improved. The questions from each are are listed below, followed by the City's response: Questions from Jeremy Tyndall: 1. ESA Checklist, page 2: The question about hazardous substances is not marked. Is the answer yes or no? Applicant Response: The answer is "No", the project will not result in the processing or handling, storage, or treatment of hazardous substances. 2. ESA Checklist, page 4: You indicate that no evergreen trees will be cleared within 200 feet. There is quite a bit of trees around the culvert. Do you anticipate removing any trees and if so will these be replaced/relocated? Applicant Response: The project requires the removal of trees and a landscape plan has been developed consistent with TMC 18.54, Tree Regulations. The landscape plan includes information on the number of trees that will be planted consistent with the ratios identified in TMC 18.54.130. Staff Response: Some of the trees identified as being removed along the construction route fall within steep sloped areas regulated by the City's Sensitive Areas Ordinance. These trees will be replaced based on the size of the tree being removed. 3. ESA Checklist, page 7: Under #4 (Plants) part D, what are 'live stakes'? Applicant Response: Live stakes are dormant, live, woody cuttings of a species with the branches trimmed off. Live staking helps to stabilize the soil by creating a root mat and binding soil particles together. 4. SEPA Checklist, page 8: Under b. Noise, #2: You indicate that work would take place during daytime hours as allowed by the City of Tukwila Municipal Code. Do you anticipate that work will routinely last till 10 p.m. as allowed under this statute? If so, that causes me concern. CL Page5of7 H:\E14-010 Gilliam Creek Culvert Replacement\Staff Rpt. 10/20/2014 10:32 AM E 14-0010: SEPA Staff Report 42' Ave. South Road Widening and Culvert Replacement Project October 20, 2014 Applicant Response: No, it is not anticipated that work will done during the full hours allowed for under the City Code. A typical end of day for construction work is much earlier than 10 pm. There are no plans at this time to have the work done with double shifts or into evening hours. 5. SPA Checklist, page 11: You indicate that some 'informal' parking spaces on private property may be affected. What does this mean? Which parking do you anticipate may be impacted? Also, where will all the people on this project be parking their work and/or personal vehicles? Will construction equipment be stored on site when not in use or overnight? Applicant Response: The project widens the footprint of 42nd Avenue South within the existing City of Tukwila right-of-way to construct project improvements. In some locations where the existing shoulder was wide enough, residents could use this area for parking, but during and after construction these informal spaces will be removed. These locations are limited given the width of the existing shoulder along much of the project area. Access is maintained to all existing driveways and parking lots along the project corridor. The selected contractor is responsible for procuring a job site to house a trailer for construction administration work and use as a lay -down yard to store construction materials in advance of the installation work. In some cases, workers will park their personal vehicles at this site. While work is underway, the work vehicles are anticipated to be throughout the work zone as needed. It is possible that construction equipment will be stored on the job site when not in use. At no point will the contractor be allowed to utilize private property for parking or storage unless prior arrangements are made. Arrangements could range from an informal agreement between the contractor and the private property owner or could be formalized in a Temporary Construction Easement granted to the City, depending on the situation. Muckleshoot Indian Tribe: 1. How was the 11 foot bankfull width determined for Gilliam Creek? We couldn't find documentation as to how the consultants determined this width as the appropriate bankfull width for Gilliam Creek in the project site. This is a key numeric as bankfull width is the variable used to determine the necessary culvert width for Stream Simulation. It is essential that this measurement be accurate for purposes of creating fish passage. Applicant Response: The bankfull width was measured by a CH2M HILL biologist and Larry Fisher (WDFW Biologist) for the area downstream of the existing culvert. Points were taken about every 50 feet for a distance of 300 feet from the culvert. Given the undersized culvert and the dam structure located about 60 feet upstream of the culvert an accurate measurement could not be taken in this area. However, given the length of the culvert the same bankfull width measured on the downstream side would apply to the upstream side. Design of the culvert was based upon WDFW fish passage guidelines and design considerations made in the field by the WDFW Biologist. 2. Please note that the drawings and the project narratives describe a failed dam structure just 70 feet upstream of the culvert crossing (see Sheet 23, 30% submittal March 2013). This structure should be removed as part of the project as it has failed and is likely its own fish passage barrier and the City will be doing in -water construction at the site anyway. CL Page 6 of 7 H:AE14-010 Gilliam Creek Culvert Replacement\Staff Rpt. 10/20/2014 10:32 AM f 1 E14-0010: SEPA Staff Report 42m1 Ave. South Road Widening and Culvert Replacement Project October 20, 2014 Applicant Response: The dam structure is outside of the project limits and is not associated with the culvert replacement and roadway project. The dam is constructed on private property and has been in place for an estimated 50+ years. The City is aware of the failing dam, as well as other barriers to fish passage both up and downstream of the culvert. The City prioritizes removal of fish passage barriers which are in the public right of way but does encourage property owners to address them as well. 3. The project also proposes to treat some of the stormwater as part of the project where there is currently no stormwater treatment. Stormwater impacts to coho salmon were not identified as a potential issue in the materials we reviewed. As coho salmon are the most likely salmon species to be found in Gilliam Creek, they should be considered and stormwater treated to the fullest extent possible to reduce metals, oils, and PAHs found in stormwater. We are including some literature regarding this potential impact and concern. Applicant Response: There are a number of fish barriers downstream that prevent fish from getting near the project location. Approximately 300 feet downstream there is a drop structure with debris cage. At this point, the stream drops about 8 feet straight down and enters a culvert under the roadway before daylighting again. Other fish barriers downstream include about 1,500 feet of culvert that includes a number of bends and larger stormwater detention facility. These numerous barriers prevent fish from getting close to the project site and it is likely fish can only access those portions of Gilliam Creek in close proximity to the Green River. The project would reduce pollutant generating surfaces and pollutants would either be reduced or remain the same as existing conditions. The project would meet the King County Conservation Flow Control Standards. Prior to construction, the contractor will be required to implement best management practices to minimize and avoid water quality impacts to Gilliam Creek. VII. CONCLUSION The proposal does not have the potential to impact the environment. VIII. STAFF RECOMMENDATION Staff recommends that pursuant to WAC 197-11-340 (1), a Determination of Nonsignificance (DNS) be issued for this project. This DNS is based on impacts identified within the environmental checklist, attachments, and the above "Final Staff Evaluation for Application No. E14-0010", and is supported by plans, policies, and regulations formally adopted by the City of Tukwila for the exercise of substantive authority under SEPA to approve, condition, or deny proposed actions. Prepared by: Date: Carol Lumb, Senior Planner October 20, 2014 CL Page7of7 H:\E14-010 Gilliam Creek Culvert Replacement\Staff Rpt. 10/20/2014 10:32 AM 1. 41. CITY OF TUKWILA SEATTLE KING COUNTY GILLIAM CREEK CULVERT LOCATION J L~J 9150 ST 9151ST 9151ST PROJECT LOCATION 3159ST 16DST � I 91595T' 162ST 15091 Sr 9 1S4 ST �If1 VICINITY MAP NOT TO SCALE STRMIDER&VD 1 Ciof Tukwila ESA Screening Checklist City of Tukwila Endangered Species Act Screening Checklist Date: 06/25/2014 Applicant Name: City of Tukwila JU f 1011 Street Address: 6300 Southcenter Blvd, Ste 100 City, State, Zip: Tukwila, WA 98188 Telephone: (206) 431-2450 LUNMENT DIRECTIONS: This Screening Checklist has been designed to evaluate the potential for your project to result in potential "take" of Chinook salmon, Coho salmon, or Cutthroat trout as defined by Section 9 of the Endangered Species Act. The checklist includes a series of "Yes" or "No" questions about your project, organized into four parts. Starting with Part A on Page 2, read each question carefully, mark the appropriate "Yes" or "No," and proceed to the next question as directed by the checklist. To answer these questions, you may need to refer to site plans, grading and drainage plans, critical areas studies, or other documents you have prepared for your project. The City will evaluate your responses to determine if "take" is indicated. deptstore\dcd common$\Applications-Handouts, Land Use \2014 WEBSITE\March 2014 (Corrected Fast Signs fee)\LAND USE-WORD-docx\SEPA Environmental Review Application- Jan2011.docx Page 1 City uf Tukwila ESA Screening Checklist Part A: Please review and answer each question carefully. Consider all phases of your project including, but not limited to, construction, normal operation, potential emergency operation, and ongoing and scheduled maintenance. Continue to the next question as directed for each No or Yes answer. 1-0 1 Will the project require any form of grading? Grading is defined as any excavating, filling, clearing, or creation of impervious surface, or any combination thereof, which alters the existing ground surface of the earth (TMC 18.06.370). Please mark the appropriate response. NO - Continue to Question 2-0 YES - Continue to Question 1-1 (Page 3) 2-0 Will the project require any form of clearing? Clearing means the removal or causing to be removed, through either direct or indirect actions, any vegetation from a site (18.06.145). Please mark the appropriate response. NO - Continue to Question 3-0 ✓ YES - Continue to Question 2-1 (Page 4) 3-0 Will the project require work, during any time of the project, below the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers or in wetlands? Ordinary high water mark is the mark that is found by examining the bed and banks of a stream and ascertaining where the presence and action of waters are so common and usual as to distinctly mark the soil from that of the abutting upland, in respect to vegetation (see TMC Chapter 18.06, Page 18-15). Please mark the appropriate response. NO - Continue to Question 4-0 1 YES - Continue to Question 3-1 (Page 5) 4-0 Will the project result in the processing or handling, storage, or treatment of hazardous substances? This does not include the proper use of fuel stored in a vehicle's fuel tank. Hazardous substances are any liquid, solid, gas, or sludge, including any material, substance, product, commodity, or waste, regardless of quantity, that exhibits the characteristics or criteria of hazardous waste as defined by Washington Administrative Code 173-303 (TMC 18.06.385). This includes fuel or other chemicals stored on-site during construction. Please mark the appropriate response. NO - Continue to Question 5-0 YES - Continue to Question 5-0 5-0 Will the project result in the withdrawal, injection, or interception of groundwater? Examples of projects that may affect groundwater include, but are not limited to: construction of a new well, change in water withdrawals from an existing well, projects involving prolonged construction dewatering, projects installing French drains or interceptor trenches, and sewer lines. For the purpose of this analysis, projects that require a geotechnical report pursuant to the requirements of TMC 18.45.060 or would require a geotechnical report if not exempt should answer Yes. Please mark the appropriate response. NO - Continue to Question 6-0 1 YES - Continue to Question 6-0 6-0 Will the project involve landscaping or re -occurring outdoor maintenance that includes the regular use of fertilizers, pesticides, or herbicides? This does not include the one-time use of transplant fertilizers. Landscaping means natural vegetation such as trees, shrubs, groundcover, and other landscape materials arranged in a manner to produce an aesthetic effect appropriate for the use of the land (TMC 18.06.490). For the purpose of this analysis, this includes the establishment of new lawn or grass. Please mark the appropriate response. NO — Checklist Complete YES — Checklist Complete `deptstoredcd common$` Applications -Handouts. Land Use 2014 WEBSITE\March 2014 (Corrected Fast Signs fee),LAND USE-WORD-docx'SEPA Environmental Review Application- Jan2011.docx Page 2 r l 1 � 1 City of Tukwila ESA Screening Checklist Part B: Please answer each question below for projects that include grading. Review each question carefully, considering all phases of your project including, but not limited to construction, normal operation, potential emergency operation, and ongoing and scheduled maintenance. Continue to the next question as directed for each No or Yes answer. 1-1 ✓ Will the project involve the modification of a watercourse bank or bank of the Green/Duwamish or Black Rivers between the ordinary high water mark and top of bank? This includes any projects that will require grading on any slope leading to a river or stream, but will not require work below the ordinary high water mark. Work below the ordinary high water mark is covered in Part C. Please mark the appropriate response. NO - Continue to Question 1-2 YES - Continue to Question 1-2 1-2 Could the construction, operation, or maintenance of the project result in sediment transport off site or increased rates of erosion and/or sedimentation in watercourses, the Green/Duwamish rivers, or the Black River? Most projects that involve grading have the potential to result in increased erosion and/or sedimentation as a result of disturbances to the soil or earth. If your project involves grading and you have not prepared a Temporary Erosion and Sedimentation Control Plan specifically designed to retain 100 percent of the runoff (including during construction) from impervious surface or disturbed soils, answer Yes to this question. If your project is normally exempt under the Tukwila Municipal Code and would not require the preparation of a Temporary Erosion and Sedimentation Control Plan, BUT may still result in erosion or sediment transport off site or beyond the work area, answer Yes to this question. Please mark the appropriate response. NO - Continue to Question 1-3 ✓ YES - Continue to Question 1-3 1-3 Will the project result in the construction of new impervious surfaces? Impervious surfaces include those hard surfaces which prevent or restrict the entry of water into the soil in the manner that such water entered the soils under natural conditions prior to development; or a hard surface area that causes water to run off the surface in greater quantity or at an increased rate of flow from the flow presented under natural conditions prior to development. Such areas include, but are not limited to, rooftops, asphalt or concrete paving, compacted surfaces, or other surfaces that similarly affect the natural infiltration or runoff patterns existing prior to development (TMC 18.06.445). Please mark the appropriate response. NO - Continue to Question 2-0 (Page 2) ✓ YES - Continue to Question 1-4 1-4 Will your project generate stormwater from the creation of impervious surfaces that will not be infiltrated on site? For the purpose of this analysis, infiltration includes the use of a stormwater treatment and management system intended to contain all stormwater on site by allowing it to seep into pervious surface or through other means to be introduced into the ground. If your project involves the construction of impervious surface and does not include the design of a stormwater management system specifically designed to infiltrate stormwater, answer Yes to this question. Please mark the appropriate response. ✓ NO - Continue to Question 2-0 (Page 2) YES - Continue to Question 2-0 (Page 2) \\deptstore\dcd commonS\Applications-Handouts, Land Use\2014 WEBSITE\March 2014 (Corrected Fast Signs fee)\LAND USE-WORD-docx\SEPA Environmental Review Application- Jan201 I.docx Page 3 City of Tukwila ESA Screening Checklist Part C: Please review each question below for projects that include clearing. Review each question carefully, considering all phases of your project including, but not limited to construction, normal operation, potential emergency operation, and ongoing and scheduled maintenance. Continue to the next question as directed for each No or Yes answer. 2-1 ✓ Will the project involve clearing within 200 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? Please mark the appropriate response. NO - Continue to Question 3-0 (Page 2) YES - Continue to Question 2-2 2-2 Will the project involve clearing of any trees within 200 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? A tree is defined by TMC 18.06.845 as any self-supporting woody plant, characterized by one main trunk, with a potential diameter -breast -height of 2 inches or more and potential minimum height of 10 feet. Please mark the appropriate response. ✓ NO - Continue to Question 2-3 YES - Continue to Question 2-3 2-3 Will the project involve clearing of any evergreen trees from within 200 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? For the purpose of this analysis evergreen means any tree that does not regularly lose all its leaves or needles in the fall. Please mark the appropriate response. 1 NO - Continue to Question 2-4 YES - Continue to Question 2-4 2-4 Will the project involve clearing within 100 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? Please mark the appropriate response. NO - Continue to Question 3-0 (Page 2) 1 YES - Continue to Question 2-5 2-5 Will the project involve clearing within 40 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? Please mark the appropriate response. NO - Continue to Question 3-0 (Page 2) 1 YES - Continue to Question 3-0 (Page 2) deptstore\dcd common$ Applications -Handouts. Land Use 2014 WEBSITE March 2014 (Corrected Fast Signs fee) LAND USE-WORD-docx`SEPA Environmental Review Application- Jan201 I.docx Page 4 City of Tukwila ESA Screening Checklist Part D: Please review each question below for projects that include work below the ordinary high water mark of watercourses or the Duwamish/Green or Black Rivers or in wetlands. Review each question carefully, considering all phases of your project including, but not limited to, construction, normal operation, potential emergency operation, and ongoing and scheduled maintenance. Continue to the next question as directed for each No or Yes answer. 3-1 iYES Will the project involve the direct alteration of the channel or bed of a watercourse, the Green/Duwamish rivers, or Black River? For the purpose of this analysis, channel means the area between the ordinary high water mark of both banks of a stream, and bed means the stream bottom substrates, typically within the normal wetted -width of a stream. This includes both temporary and permanent modifications. Please mark the appropriate response. NO - Continue to Question 3-2 - Continue to Question 3-2 3-2 Will the project involve any physical alteration to a watercourse or wetland connected to the Green/Duwamish River? For the purpose of this analysis, "connected to the river means" flowing into via a surface connection or culvert, or having other physical characteristics that allow for access by salmonids. This includes impacts to areas such as sloughs, side channels, remnant oxbows, ditches formed from channelized portions of natural watercourses or any area that may provide off channel rearing habitat for juvenile fish from the Duwamish River. This includes both temporary construction alterations and permanent modifications. Watercourses or wetlands draining to the Green/Duwamish River that have a hanging culvert, culvert with a flap gate, diversion, or any entirely man-made or artificial structure that precludes fish access should answer Yes to this question. Please mark the appropriate response. NO - Continue to Question 3-3 ✓ YES - Continue to Question 3-3 3-3 Will the project result in the construction of a new structure or hydraulic condition that could be a barrier to salmonid passage within the watercourse or the Green/Duwamish or Black Rivers? For the purpose of this analysis, a barrier means any artificial or human modified structure or hydraulic condition that inhibits the natural upstream or downstream movement of salmonids, including both juveniles and adults. Please mark the appropriate response. ✓ NO - Continue to Question 3-4 YES - Continue to Question 3-4 3-4 Will the project involve a temporary or permanent change in the cross-sectional area of a watercourse or the Green/Duwamish or Black Rivers? For the purpose of this analysis, the cross-sectional area is defined as a profile taken from the ordinary high water mark on the right bank to the ordinary high water mark on the left bank. Please mark the appropriate response. NO - Continue to Question 3-5 YES - Continue to Question 3-5 3-5 Will the project require the removal of debris from within the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? For the purpose of this analysis, debris includes, but is not limited to fallen trees, logs, shrubs, rocks, piles, rip -rap, submerged metal, and broken concrete or other building materials. Projects that would require debris removal from a watercourse or the Green/Duwamish or Black Rivers as part of a maintenance activity should answer Yes to this question. Please mark the appropriate response. NO - Continue to Question 3-6 ✓ YES - Continue to Question 3-6 \\deptstore\dcd commonS\Applications-Handouts, Land Use\2014 WEBSITE\March 2014 (Corrected Fast Signs fee)\LAND USE-WORD-docx\SEPA Environmental Review Application- Jan2011.docx Page 5 Cil) of Tukwila ESA Screening Checklist Part D (continued) 3-6 Will the project result in impacts to watercourses or wetlands that have a surface connection to another watercourse or the Green/Duwamish or Black Rivers but do not contain habitat conditions that support salmonid use? Such areas may include, but not be limited to hillside seeps and wetlands isolated from the watercourse or river that have a surface water connection to the watercourse or river but are not assessable, nor would be assessable to salmonids under natural conditions. Wetlands with a "functions and values" rating for baseflow/groundwater support of 9 and above (or moderate) as described in Cooke (1996) should be included. Please mark the appropriate response. • NO - Continue to Question 3-7 YES - Continue to Question 3-7 3-7 Will the project include the construction of artificial waterways or wetlands connected to a watercourse containing salmonids? For the purpose of this analysis, the construction of artificial waterways or wetlands includes wetlands, channels, sloughs, or other habitat feature created to enhance wildlife use, particularly waterfowl use, or may be attractive to wildlife, particularly waterfowl. Please mark the appropriate response. NO - Continue to Question 3-8 • YES - Continue to Question 3-8 3-8 Will the project include bank stabilization? For the purpose of this analysis, bank stabilization includes, but is not limited to, rip -rap, rock, log, soil, or vegetated revetments, concrete structures, or similar structures. Please mark the appropriate response. NO - Continue to Question 4-0 (Page 2) ✓ YES - Continue to Question 4-0 (Page 2) deptstore`dcd common$\Applications-Handouts. Land Use`2014 WEBSITE March 2014 (Corrected Fast Signs fee)\LAND USE-WORD-docx SEPA Environmental Review Application- Jan20I I.docx Page 6 Environmental Checklist WAC 197-11-960 Environmental Checklist Purpose of Checklist: The State Environmental Policy Act (SEPA), chapter 43.21 RCW, requires all governmental agencies to consider the environmental impacts of a proposal before making decisions. An environmental impact statement (EIS) must be prepared for all proposals with probable significant adverse impacts on the quality of the environment. The purpose of this checklist is to provide information to help the agency, citizens, and other reviewers identify impacts from the proposal, to possibly reduce or avoid impacts from the proposal, and to help the agency decide whether an EIS is required. ENVIRONMENTAL CHECKLIST A. BACKGROUND 1. Name of Proposed Project: 40th -42nd Avenue S Phase III Gilliam Creek Culvert Replacement Project 2. Name of Applicant: City of Tukwila, Public Works Department 3. Address and phone number of applicant and contact person: 6300 Southcenter Blvd, Suite 100 Tukwila, WA 98188 (206) 433-0179 Contact: Cyndy Knighton 4. Date checklist prepared: June 25, 2014 5. Agency requesting checklist: City of Tukwila 6. Proposed timing or schedule (including phasing, if applicable): Construction during the 2015 construction season. Sensitive area work will be completed prior to September 30 of the work year or as required by the Washington Department of Fish and Wildlife (WDFW) project approval. 7. Plans for future additions, expansion or further activity related to or connected with this proposal: n/a 1 8. Environmental information that has been prepared, or will be prepared, directly related to this proposal: • Stormwater Technical Memorandum, Culvert Replacement Basis of Design Technical Memorandum. • Archeological Investigation for City of Tukwila 42nd Avenue S Culvert Replacement • Section 7 ESA Consultation; No -Effect Letter for the Proposed 40th - 42nd Avenue South — Phase III and Gilliam Creek 42nd Avenue S Surface Water Culvert Replacement • Wetland and Jurisdictional Ditch Assessment for the Gilliam Creek Culvert Replacement at 42nd Avenue S 9. Applications that are pending for governmental approval of other proposals directly affecting the property covered by the proposal: n/a 10. List of governmental approvals or permits that will be needed for the proposal: • U.S. Army Corps of Engineers (USACE), Section 404 Permit • WDFW, Hydraulic Project Approval (HPA) • Washington State Department of Ecology (Ecology), Section 401 Water Quality Certification • Washington State Department of Ecology National Pollution Discharge Elimination System (NPDES) General Construction Permit • City of Tukwila Special Permission Permit 11. Brief, complete description of the proposal, including the proposed uses and the size of the project and site: The project includes the replacement of a non -fish passable, 92 -foot long, 3 -foot diameter concrete culvert with a 146 -foot long, 16 -foot wide by 8 -foot, 4 -inch rise single radius, corrugated metal pipe (CMP), fish passable culvert, which will be constructed as part of the 42nd Avenue S road widening project. Construction of the road widening project would occur from Southcenter Boulevard to S 160th Street. The Gilliam Creek limits are assumed to extend approximately 200 feet upstream and downstream of the existing culvert under 42nd Avenue S. The proposed culvert location would be shifted approximately 17 feet south of the existing culvert to minimize impacts to the existing rockery wall on the north side of the existing culvert inlet, and the very large boulders on the north side of the existing culvert outlet. Approximately 25 feet of upstream channel and 50 feet of downstream channel will be reconstructed because of the shifted position of the new culvert. The new culvert would have a slope of 3.8 percent. The multi -plate CMP culvert would be supported by concrete footings that will be 2 feet square and 2 feet deep. The footings were sized to provide adequate support to the load from the soil on top of the culvert, and deep enough to protect the footings from being undermined by the stream flow. The existing bankfull width downstream of the culvert was measured at about 11.5 feet. The proposed culvert bed width would be about 16 feet wide under the new culvert. Construction of the road widening project includes asphalt overlay and replacement, curb, gutter, bike lane/sharrow, sidewalks, lighting, storm drainage facilities, and utility relocations as well as the culvert replacement described above. Both northbound and southbound lanes of 42nd Avenue S will have a 14 -foot wide shared lane for vehicles and bicycles. Both sides of the roadway would have new curbs and gutters, 4 -foot wide amenity zones, and sidewalks with a minimum width of 5 feet. 2 A new storm drain collection, conveyance, treatment and flow control system is proposed. Stormwater treatment consisting of either a pond or vault would be constructed within City owned property. Stormwater pretreatment units are proposed to provide some water quality treatment prior to discharge of stormwater runoff to Gilliam Creek. The proposed conveyance and detention system include an outfall to Gilliam Creek. The existing roadside ditches on the southeast and southwest sides of 42nd Avenue S will be filled and the existing stormwater flows will be piped. The existing stormwater flow pattern will not be altered. The road widening project will require the relocation of existing utility lines located within 42nd Avenue S. 12. Location of the proposal, including the street address, if any, and section, township and range, if known; a legal description, site plan, vicinity map and topographic map, if reasonably available: Within existing 60 foot wide right of way for 42nd Avenue S from Southcenter Boulevard to S 160th Street. The project is generally limited to public Right of Way and City owned property. B. ENVIRONMENTAL ELEMENTS 1. EARTH a. General description of the site (underline one): flat, rolling, hilly, steep, slopes, mountainous, other (describe). Steeply sloping b. What is the steepest slope on the site (approximate slope percentage)? Roadway: 14% Gilliam Creek channel banks: 55% c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? Specify the classification of agricultural soils and note any prime farmland. Glacial Till and roadway fill materials. No agricultural soils or prime farmland. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. No. e. Describe the purpose, type and approximate quantities of any filling or grading proposed. Indicate source of fill. This project requires excavation and backfill to widen the roadway, including some grade adjustments of existing intersections to meet ADA requirements, adjusting/replacingexisting underground utilities, construction of the retaining wall, and installation new storm drain pipe and catch basins. Excavation will also be required to replace the culvert and install the new larger fish -passable culvert. Excavated material that is not suitable for backfill will be replaced with clean fill from a WSDOT approved pit source. f. Could erosion occur as a result of clearing, construction or use? If so, generally describe. Soils exposed during construction could result in erosion during construction. Proper construction and Best Management Practices (BMPs) including covering of stockpiles/exposed soils, and control of stormwater runoff would be implemented to control 3 g. and minimize any short-term erosion.Erosion is not anticipated to be an issue under normal use of the completed project. About what percentage of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? Approximately 90%+ h. Proposed measures to reduce or control erosion or other impacts to the earth, if any. Temporary Erosion and Sediment Control (TESC) Best Management Practices (BMP's) will be implemented prior to any land disturbing activities. These practices could include silt fencing, catch basin inserts, erosion control blankets, storm flow bypass, and other measures as necessary. A Stormwater Pollution Prevention Plan (SWPPP) would be prepared prior to construction of the project. 2. AIR a. What types of emissions to the air would result from the proposal (i.e. dust. Automobile, odors, industrial wood smoke) during construction and when the project is completed? Generally describe and give approximate quantities, if known. During construction, activities will generate onsite dust and emissions from equipment operation. The dust will be created from excavation, backfill, and restoration of the areas. These effects are anticipated to be temporary, minor, and largely contained at and within short distances from the proposed project site. There are no impacts to the air after project completion. b. Are there any off-site sources of emissions or odors that may affect your proposal? If so, generally describe. No off site sources of emissions or odor have been identified that will affect the proposed project. c. Proposed measures to reduce or control emissions or other impacts to the air, if any: The construction contractor will be required to comply with Puget Sound Clean Air Agency (PSCAA) Regulation I, Section 9.15 requiring reasonable precautions to avoid dust emissions. Construction -industry BMPs will be incorporated into construction plans and contractor specifications. 3. WATER a. Surface: 1) Is there any surface water body on or in the immediate vicinity of the site, including year-round and seasonal streams, saltwater, lakes, ponds, wetlands? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. Gilliam Creek, type 3 stream with a type 3 wetland/buffer, is located within the culvert replacement project and within the immediate vicinity of the road widening portion of the project. There are two roadside stormwater ditches; one on either side of 42nd Avenue S that drain to Gilliam Creek and are located within the road widening project. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. 4 Yes. The existing culvert conveying Gilliam Creek be replaced with a larger fish -passable culvert. 3) Estimate the amount of dredge and fill material that would be removed from or placed in surface water or wetlands, and indicate the area of the site that would be affected. Indicate the source of fill material. Materials would be removed from and placed within Gilliam Creek as part of the culvert replacement project. Fill materials would be placed within the roadside stormwater ditches as discussed in the project description above for the road widening portion of the project. Activity (clear, dredge, fill, pile drive, etc.) Waterbody name' Amount of material (cubic yards) to be placed in or removed from waterbody Area (sq. ft. or linear ft.) of waterbody directly affected Fill (streambed) Gilliam Creek Approx. 356 Approx. 3,200 sq. ft. Fill (Footings) Gilliam Creek Approx. 0.3 Approx. 4 sq. ft. Excavation (Streambed) Gilliam Creek Approx. 3,600 Approx. 135 If Backfill around new culvert Gilliam Creek Approx. 1,500 Approx. 135 If Fill Southeast Ditch Approx. 1,460 Approx. 385 If Fill Southwest Ditch Approx. 18 Approx. 20 If Nearby wetlands are located outside of the project area and would not be affected by the project. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose and approximate quantities, if known. No permanent withdrawals or diversions will be made. Work will be completed during the drier summer months; however, base flows within Gilliam Creek will be temporarily diverted around the active work zones during culvert replacement activities. 5) Does the proposal lie within a 100 -year flood plain? If so, note location on the site plan. No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. No. b. Ground 1) Will ground water be withdrawn or will water be discharged to ground water? Give general description, purpose and approximate quantities, if known. Yes, groundwater, where encountered will be withdrawn as necessary for trenching and pipe installation activities. 2) Describe any waste material that will be discharged into the ground from septic tanks or other sources (e. g., domestic sewage, industrial, agricultural, etc.). Describe the 5 general size of the system, the number of such systems, the number of houses to be served, or the number of animals or humans the system(s) are expected to serve. None. c. Water Runoff (including storm water) 1) Describe the source of runoff (including storm water) and method(s) of collection and disposal, if any (include quantities, if known). Will this runoff water be discharged or flow into surface waters or ground water? If so, describe. This project includes widening of an existing roadway, which currently provides collection and conveyance for stormwater generally using open ditches and pipes, which discharge into Gilliam Creek. Storm water treatment and detention of runoff generated by the new surface area will be added as part of the project. Runoff is from the 42nd Avenue S roadway and adjacent residential properties. 2) Could waste materials or toxic materials enter ground or surface waters during or as a result of this proposal? If yes, generally describe. Release of waste material could potentially occur from accidental fuel leaks or spills from construction machinery. A Spill Prevention and Control and Countermeasure (SPCC) Plan will be in place for this work. d. Proposed measures to reduce or control surface, ground and runoff water impacts, if any: During construction, standard BMPs may include, but are not limited to temporary sediment and erosion control measures such as installation of catch basin inserts, silt fences, straw bale check dams, straw mulching, and plastic covering, as well as other requirements imposed by City of Tukwila, Federal, and state agency regulations. A SWPPP will be prepared per the Washington State Department of Ecology guidelines prior to construction. 4. PLANTS a. Underline types of vegetation found on the site: b. What kind and amount of vegetation will be removed or altered? Vegetation will be removed as part of the road widening and culvert replacement project. Appropriate native plantings will be installed in the stream buffer area. No streetside vegetation is proposed as part of this project. 6 Deciduous tree: alder, maple, aspen, other cottonwood Evergreen tree: fir, cedar, pine, other Shrubs Grass Pasture Crop or grain Wet soil plants: cattail, buttercup, bulrush, skunk cabbage, other Water plants: water lily, eelgrass, milfoil, other Other types of vegetation: b. What kind and amount of vegetation will be removed or altered? Vegetation will be removed as part of the road widening and culvert replacement project. Appropriate native plantings will be installed in the stream buffer area. No streetside vegetation is proposed as part of this project. 6 c. List threatened or endangered species or critical habitat known to be on or near the site: The Section 7 ESA Consultation No -Effect Letter (CH2M HILL, 2014) states that there are no listed species or designated critical habitat areas within the action area of the proposed project. d. Proposed landscaping, use of native plants or other measures to preserve or enhance vegetation on the site, if any: Ground disturbance and clearing will be mitigated by planting native plant species over all disturbed areas. Restoration will include placement of fine mulch, temporary erosion control blanket, and planting of live stakes. 5. ANIMALS a. Underline any birds and animals that have been observed on or near the site, or are known to be on or near the site: Birds: Hawk, heron, eagle, songbirds, other: Mammals: Deer, bear, elk, beaver, other: Fish: Bass, salmon, trout, herring, shellfish, other: Other: b. List any threatened or endangered species or critical habitat known to be on or near the site. None known. c. Is the site part of a migration route? If so, describe. No. d. Proposed measures to preserve or enhance wildlife, if any. The proposed culvert would help to improve fish passage within Gilliam Creek. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. n/a b. Would the project affect the use (potential or actual) of solar energy by adjacent properties? If so, generally describe. n/a c. What kinds of energy conservation features are included in the plans for this proposal? List any other proposed measures to reduce or control energy impacts, if any. n/a 7 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals or hazardous wastes, risk of explosion or fire that could occur as a result of this proposal? If so, describe. Subsurface work could come into contact with underground utilities, such as Puget Sound Energy (PSE) gas or Seattle City Light (SCL) lines, and water and sewer mains located under the roadway, if not property located prior to construction. 1) Describe special emergency services that might be required. Construction of the proposed project may require services from the City of Tukwila Fire Department and/or PSE emergency response. 2) Proposed measures to reduce or control environmental health hazards, if any: Coordination with PSE and the City's contractor to protect the gas mains, as well as potholing to locate existing utilities prior to construction. b. Noise 1) What types of noise exist in the area which may affect the project (e.g., traffic, heavy equipment, operation, industrial, other)? n/a 2) What types and levels of noise would be created by, or associated with the project, on a short-term or a long-term basis (for example, traffic, construction, operation, other)? State what hours noise would come from the site. Short term construction would increase the ambient noise during normal construction hours, but long term the traffic noise level will remain the same. Construction would occur during daytime hours as allowed by the City of Tukwila Municipal Code, Title 8.22. 100 and 8.22.110. 3) Proposed measures to reduce or control noise impacts, if any: Construction equipment would be equipped with operating mufflers and construction would take place during typical daytime construction hours during daytime hours per City of Tukwila code as stated above. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? Public roadway with adjacent properties with single and multifamily homes. b.Has the site been used for agriculture? If so, describe. Unknown. c. Describe any structures on the site. Existing above ground structures include the 42nd Avenue S roadway, a single family residence owned by the City of Tukwila, overhead utilities, and elevated structures 8 associated with SR 518 and the Sound Transit Link light rail guideway, and the existing culvert. d. Will any structures be demolished? If so, what? No. e. What is the current zoning classification of the site? LDR, HDR. f. What is the current comprehensive plan designation of the site? LDR, HDR g. What is the current shoreline master program designation of the site, if any? n/a. h. Has any part of the site been classified as an environmentally sensitive area? If so, specify. No. i. Approximately how many people would reside or work in the completed project? n/a. j. Approximately how many people would the completed project displace? None. k. Proposed measures to avoid or reduce displacement impacts, if any. n/a I. Proposed measures to ensure the project is compatible with existing and projected land uses and plans in the area. n/a. 9. HOUSING a. Approximately how many housing units would the project provide, if any? Indicate whether high, middle or low income housing. n/a. b. Approximately how many housing units would be eliminated, if any? Indicate whether high, middle or low income housing. None. c. Proposed measures to reduce or control housing impacts, if any: n/a. 9 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? n/a. b. What views in the immediate vicinity would be altered or obstructed? None. c. Proposed measures to reduce or control aesthetic impacts, if any: n/a 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur? No new lighting or glare sources would be produced. b. Could light or glare from the finished project be a safety hazard or interfere with views? No. c. What existing off-site sources of Tight or glare may affect your proposal? n/a d.Proposed measures to reduce or control Tight and glare impacts, if any. n/a 12. RECREATION a. What designated or informal recreational opportunities are in the immediate vicinity? n/a b. Would the project displace any existing recreational uses? If so, describe. No. c. Proposed measures to reduce or control impacts on recreation including any recreational opportunities to be provided by the project or applicant. n/a 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any sites, structures or objects listed on, or proposed for national, state or local preservation registers known to be on or near to the site? If so, generally describe. No. 10 i . b. Generally describe any landmarks or evidence of historical, archaeological, scientific or cultural artifacts of importance known to be on or near the site. None known. c. Proposed measures to reduce or control impacts, if any. n/a 14. TRANSPORTATION a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. 42nd Avenue S can be accessed from Southcenter Boulevard to the north and S 160th Street to the south. b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? No. • Route 156 runs along S 164th Street with a transit stop at 44th Avenue S, about one- half mile southeast of the project. • Route 128 runs along Southcenter Boulevard with a transit stop located about 200 feet to the west of the project, • The Link Light Rail Station is located at the southeast corner of Southcenter Boulevard and International Boulevard, less than one-half mile to the west of the project location. c. How many parking spaces would the completed project have? How many would the project eliminate? No parking spaces will be provided as part of the project. No public parking spaces will be eliminated but it is possible that some informal parking spaces on private property will be impacted. Some of the potentially impacted parking spaces may or may not be in public right of way. d. Will the proposal require any new roads, streets or improvements to existing roads or streets (not including driveways)? If so, generally describe, and indicate whether public or private. n/a e. Will the project use (or be in the immediate vicinity of) water, rail or air transportation? If so, generally describe. No. f. How many vehicular trips per day would be generated as a result of the project? Indicate when peak traffic would occur, if known. g. None. Proposed measures to reduce or control transportation impacts, if any. n/a 11 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (e.g., fire and police protection, health care, schools, other)? If so, generally describe. n/a b. Proposed measures to reduce or control direct impacts on public services, if any. n/a 16. UTILITIES a. Underline utilities currently available at the site: electricity, natural gas, water, telephone, refuse service, sanitary sewer, septic system, other. Electricity, natural gas, water, telephone, stormwater, sewer, cable. b. What utility service will be needed by the project? Who (which utility) will provide the service, and what utility construction will be required on or in the immediate vicinity of the site? No utility service is needed by the project. C. SIGNATURE The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its •ecision. Signature. Date submitted:/ 12 fl —1 n • ri n —J { fl ._J • • • ♦ • TREE REE REE TREE ROCKERY WALL TREE REE ROCKERY WALL MAILBO REE I OLLARD ROCKERY WALL 71+16.82 SAWCUT SITE PREPERATION CONSTRUCTION NOTES: OINSTALL INLET PROTECTION IN CATCH BASIN ODO NOT DISTURB O3 REMOVE EXTRUDED CURB 0 REMOVE AND RESET OS REMOVE 3 0 drooro ,go,,r./A AVAC.40/ ILII/�APIWIXOT//JlV AirArir 67+00 68+00 69 MATCH LINE 42ND AVE S. RIDGE COLUMN, TYP 68+00.00 d SAWCUT S 69+00.00 END SAWCUT FENC ARRIER • 42ND 69+44.64, 31.00' RT, BEGIN( FENCE TRE 42ND 70+13.97 79.74' RT END FENCE TRE TRE rt C; C REE TREE LEGEND — SAW — SAWCUT PAVEMENT, FULL DEPTH SILT FENCE HIGH VISIBILITY FENCE 0 INLET PROTECTION inn foAr. REMOVE REMOVE HMA PAVEMENT REMOVE CEMENT CONCRETE PLANING CLEARING AND GRUBBING EXISTING RIGHT OF WAY 0 20 40 SCALE IN FEET L • L PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by dale MRK KIM cbeck ed MGI qM long rire• CH2M H I LL® CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DEMOLITION AND EROSION CONTROL PLAN Oft revisions 8 file no scab 1'=20' 52, DM -5 date 8/1912014 a X - > 1 •••1VARIES 16'-31' W SEE ALTERNATE L, SECTIONS L1 L2, L3 AND L6 • VARIES VARIES • -.7'-11' 0'-4' 4„ ©\`• SIDE- PAVER AI • WALK 2% ` MAX Ng'( ?'7 21 • • 51+78 TO 52+40 57+08 TO 57+35 53+12 TO 53+40 57+64 TO 63+19 53+78 TO 55+40 63+74 TO 69+35 56+03 TO 56+12 70+05 TO 70+60 ALTERNATE SECTION L1 SEE ALTERNATE SECTIONS L1, L3, L4 AND L6 42ND 14' 14' VARIES 16-26' SEE ALTERNATE SECTIONS R1,R2 AND R5 SB -LANE WITH SHARROW NB -LANE WITH SHARROW VARIES VARIES 0,-4' 5-9, O O 2% 2% MAX O0 PAVER SIDE- 4" 2% WALK .L MAX NSA unmugl!! r1!nuuRM 0 2 50+50 TO 53+00 0 69+00 TO 69+85 TYPICAL SECTION A FULL DEPTH PAVEMENT I r RETAINING WALL WITH FENCE, SEE NOTE 3 DRAINAGE DITCH, SEE NOTE 4 16' VARIES 14' TO 19' SB -LANE WITH SHARROW 42ND 2% MAX VARIES 14' TO 19' NB -LANE WITH SHARROW 3" 53+25 TO 56+12 57+08 TO 57+20 57+85 TO 58+10 58+30 TO 61+70 ALTERNATE W - 2'7 © 2 62+30 TO 63+05 63+35 TO 69+55 70+25 TO 71+16.82 SECTION R1 SEE ALTERNATE SECTIONS R1, R2 AND R5 2% MAX X wl VARIES 7-8' VARIES' 0'-4' MEI uuumui1. SIDE- WALK PAVER 2" 50+50 TO 51+40 ALTERNATE SECTION L2 16' © O DRAINAGE DITCH/FENCH DRAIN, SEE NOTE 4 VARIES VARIES VARIES 7-11' 0'-4' SIDE- PAVER WALK 2% MAX 2" nnurum� © 0 51+40 TO 51+78 55+40 TO 56+03 52+40 TO 53+12 57+35 TO 57+64 ALTERNATE SECTION L3 RETAINING -- WALL WITH FENCE, SEE NOTE 3 VARIES 11' TO 16' VARIES 7-8.7' OMB �e�reuunrum� VARIES 0'-4' SIDE- PAVER WALK 2% MAX 2' © O 53+40 TO 53+78 70+60 TO 71+16.82 ALTERNATE SECTION L4 O O 53+00 TO 54+80 69+85 TO 71+16.82 " VARIES VARIES 0' 4' 5'-9' PAVER SIDE- WALK TYPICAL SECTION B FULL DEPTH PAVEMENT WITH OVEREXCAVATION EXCAVATE 24" BELOW EXISTING GRADE 3" VARIES O 2% MAX 16' O 5' • LAND- SCAPING ZONE 4" ST 2" y 50+50 TO 53+25 63+05 TO 63+35 ALTERNATE SECTION R2 16' RETAINING WALL WITH FENCE, SEE NOTE 3 RETAINING WALL WITH FENCE, SEE NOTE 3 61+70 TO 62+30 ALTERNATE SECTION R3 PAVER SIDE- WALK 57+20 TO 57+85 58+10 TO 58+30 ALTERNATE SECTION R4 x w DRAINAGE FRENCH DRAIN, SEE NOTE 4 r RETAINING W I WALL WITH 1 FENCE, SEE NOTE 3 SEE ALTERNATE SECTIONS L1, L3 AND L5 14' SB -LANE 16' VARIES 3' TO 6' LAND- CAPIN ZONE r 3' VARIES 7'-11' SIDE- WALK VARIES 0'-4' PAVER H y 2% MAX 42ND Q SEE ALTERNATE 14' SECTIONS R1, R2, R3 AND R4 2" 63+19 TO 63+74 ALTERNATE SECTION L5 SEE ALTERNATE SECTIONS L1 VARIES 15.6'-16' 4' 7' SIDE- WALK 2% MAX F 7 W 2% MAX 2" 69+35 TO 70+05 AT CULVERT ALTERNATE SECTION L6 PAVING CONSTRUCTION NOTES: O HMA CL.'/ -INCH PG 64-22 OHMA CL. 1 -INCH PG 64-22 O CRUSHED SURFACING BASE COURSE 11' OVERLAY _VARIES NB -LANE WITH SHARROW 3" 10.5' OVERLAY VARIES 2" MIN 54+80 TO 56+12 3" 57+08 TO 68+00 TYPICAL SECTION C OVERLAY AND WIDENING 14' SB -LANE 0 0 0 42ND 14' H 2% MAX SEE ALTERNATE ,SECTIONS R1 NB -LANE WITH SHARROW 11' OVERLAY 3" 6" 68+00 TO 69+00 TYPICAL SECTION D OVERLAY AND WIDENING FULL DEPTH RIGHT OF CENTERLINE 13' VARIES 3" 2" MIN 3" CEMENT CONCRETE CURB AND GUTTER SEE CURB DETAIL PER CITY OF TUKWILA STD PLAN DRAWING NO RS -08C. CEMENT CONCRETE SIDEWALK ®CONCRETE PAVER, SEE DETAIL M PVD -1 OSINGLE -SLOPE CONCRETE BARRIER (PRECAST), PER WSDOT STD PLAN C-70.10-00 6" 4" 1 69+55 TO 70+25 AT CULVERT ALTERNATE SECTION R5 GENERAL NOTES: 1. ROADWAY SECTIONS ARE FOR GENERAL INFORMATION ONLY REGARDING ROADSIDE APPURTANCES SUCH AS SIDEWALKS, CURB AND GUTTER, RETAINING WALLS, ETC. FOR EXACT LOCATIONS, SEE PLAN AND PROFILE PLANS. 2. 42ND 50+02.02 TO 42ND 50+50.00 AND 42ND 56+12.00 TO 42ND 57+08.00 REFER TO DWGS IG -1 AND IG -2 FOR INTERSECTION GRADING. 3. FOR WALL LOCATIONS, PROFILES, DETAILS AND LIMIT OF FENCE, REFER TO DWGS RT -1 TO RT -5. 4. FOR DRAINAGE DITCH OR FRENCH DRAIN LOCATIONS AND DETAILS, REFER TO DWGS DR -1 TO DR -5 AND DRD-1. 5. FOR FLOWLINE ELEVATIONS, SEE PAVING PLAN AND PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- dr desired I01W docked pol told bit no CH2MH1LL. CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III TYPICAL ROADWAY SECTIONS as revisions PROFILE. 52 , file no RS -1 scale date 8/1912014 • J . J r .J fl • j -J GENERAL NOTES: 1. EXISTING UNDERGROUND UTILITIES ARE SHOWN FOR THE CONVENIENCE OF THE CONTRACTOR ONLY AND ARE BASED ON INFORMATION PROVIDED BY THE UTILITY COMPANIES AND FIELD SURVEY OF EXISTING FEATURES, AND ARE THEREFORE APPROXIMATE. THE CONTRACTOR SHALL VERIFY THE EXACT LOCATION OF ALL UTILITIES PRIOR TO BEGINNING WORK. 2. FOR RETAINING WALL ELEVATIONS AND DETAILS, SEE DWGS RT -1 TO RT -5. 3. CONTRACTOR SHALL BE RESPONSIBLE FOR CLEARLY MARKING SEWER AND WATER APPURTENANCES PRIOR TO PAVING OVER THEM. 4. CLEARING LIMITS SHOWN ON DWGS DM -1 TO DM -5. 5. FOR DRIVEWAY PAVING DETAILS, SEE PVD -1 ' 6. FOR ALIGNMENT CONTROL DATA, SEE SURVEY CONTROL DWG SV -1. 7. FOR DRAINAGE AND UTILITY PLAN AND PROFILE, SEE DWGS DR -1 TO DR -5. 8. DIMENSIONS ARE TO THE PROPOSED FACE OF CURB UNLESS OTHERWISE NOTED. 9. FOR LANDSCAPING PLAN, SEE DWGS LA -1 TO LA -5. CONSTRUCTION NOTES: 11 12 CONSTRUCT CEMENT CONCRETE CURB RAMP, SEE CITY OF TUKWILA STANDARD PLAN DWG NO. RS -12. STATION AND OFFSET CALLOUT TO THE CENTER OF RAMP LANDING CONSTRUCT CEMENT CONCRETE CURB RAMP TYPE PARALLEL A, SEE WSDOT STANDARD PLAN NO. F-40.12-01. STATION AND OFFSET CALLOUT TO THE CENTER OF RAMP LANDING CONSTRUCT AC CURB RAMP, SEE DETAIL CONSTRUCT CONCRETE PAVER, SEE DETAIL PVD -1 CONSTRUCT CEMENT CONCRETE SIDEWALK, SEE CITY OF TUKWILA STANDARD PLAN DWG NO. RS -11 CONSTRUCT CONCRETE CURB AND GUTTER, SEE CITY OF TUKWILA STANDARD PLAN DWG NO. RS -08B FOR CURB DETAIL CONSTRUCT 3" OF HMA CL 'A" PG 64-22 OVER 3" OF HMA CL 1" PG 64-22 OVER 6" CRUSHED SURFACING BASE COURSE CONSTRUCT 3" OF HMA CL 'A" PG 64-22 OVER 3" OF HMA CL 1" PG 64-22 OVER MINIMIUM OF 18" CRUSHED SURFACING BASE COURSE CONSTRUCT 2" OF HMA CL 'A" PG 64-22 FOR OVERLAY CONSTRUCT EXTRUDED CURB, TYPE 6, SEE WSDOT STANDARD PLAN NO. F-10.42-00. STATION AND OFFSET CALLOUT TO THE FACE OF CURB CONSTRUCT SINGLE -SLOPE CONCRETE BARRIER (PRECAST), SEE WSDOT STANDARD PLAN DWG NO. C-70.10-00. STATION AND OFFSET CALLOUT TO THE CENTER OF BARRIER INSTALL BLACK VINYL COATED CHAIN LINK FENCE TYPE 4, SEE WSDOT STD PLAN L-20.10-02. LEGEND (XX //, FULL DEPTH HMA PAVEMENT FULL DEPTH HMA PAVEMENT WITH 12" OVER - EXCAVATION HMA OVERLAY 2" MINIMUM DRIVEWAY 4" HMA CEMENT CONCRETE SIDEWALK CONCRETE PAVER CEMENT CONCRETE DRIVEWAY APPROACH PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by m drown IGIW checked MG1 wq-e RIM etel field Olt ro CH2MH I LL® CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING LEGEND AND NOTES 10, 52 , file no PVN -1 dMb tevisions scale date 8/1912014 n fl r1 1 n J �.1 J • .J 440 430 420 410 400 390 380 370 360 I 49+00 BEGIN .. CONSTRUCTION 42ND 50+0202 BEGIN(MATCH EXIST) r 1 1 1 42ND 51+72.70, 22.00' LT 42ND 50+7 .84, 14.50' LT 42ND 51+69.70 25.00' LT CUT UT 42ND LINE 5 - -tom- 3 CSP' SEE DWG ID -1 FOR INTERSECTION DETAILS v 42ND 50+84.51 18.00' LT= WALL RVr✓1 L, CUT SEED DWG-. RT -1 1- O .ff. JIIIIFitt I 15100 I 42ND 51+78.70, 22.00' LT 42ND 51+81.70 25.00' LT 42ND 53+28.00 22.00' LT 50.00' LT MATCH EXIST -CU 42ND 53+22.00, 22.00' LT 42ND 53+19.00 23.00' LT v *0 A 2 I j ��� Is -III -I -I 7 1111.14 Aht If at/ I I no LL SEE NOTE 2 42ND 50+56.62, 18.00' RT 42 i 50+5 2, 14.50' RT 0 WALL RW -1R, SEE DWG RT -3 r�1 42ND 51+911.70= WALL RW -2R, DWY1-2 170+00.00 SEE DWG RT -4 75.00' RT MATCH EXIST 42ND 53+00.00 0.00' LT END 0 BEGIN M N d w z J 2 NOTES: 1. FOR GENERAL NOTES, CONSTRUCTION NOTES, AND LEGEND SEE DWG PVN -1. 2. SEE DWG IG -1 FOR INTERSECTION GRADING WITHIN THE FULL DEPTH PAVEMENT LIMIT, THE PAVEMENT SECTION SHALL BE THE SAME AS SHOWN IN SECTION 400 3. FOR CURVE DATA, CURB RAMPS AND CURB RETURN ELEVATIONS, SEE INTERSECTION DETAILS DWG ID -1 DRIVEWAY # STATION OFFSET WIDTH CITY OF TUKWILA STD DWG DWY1 - 1 42ND 51+93.20 LT 15' RS -08B DWY1 - 2 42ND 51+91.70 RT 20' RS -088 LEFT FLQWLINE ELEVATION, TYP - 00 PI "e- 0 0 V EXISTING GROUND of V RIGHT FLOWLINE ELEVATION, TYP N N N o,o r 0.0 O a;a v A a M M res ins 0'. M M1' M A P r V1 u1 NN 03 CO E11 E11 CO; ED n1 el MSM • u i ui a CO CO EDGED 1- M;M 49+00 50+00 PUBLIC WORKS DEPT. 51+00 -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- bY dram KRW checlud MGJ PW -Y FAM Roy Mr Addbk no 52+00 CH2M H I LL® 53+00 MATCH LINE PV2 42ND 53+30 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING PLAN AND PROFILE 0 20 40 SCALE IN FEET dna revisions 11 52, file no PV -1 scale 1'=20' • L w L date 6/19/2014 n • • ti J LJ 43.00 LT 42ND 53+31.00, 25,00' LT 0 WALL RW -2L, SEE DWG RT -1 1� .73 22 1 0' T 42ND 54+74.73 25.00' LT 32.00' LT MATCH EXIST i�• 42 g .NMD7. IIIIIIIIIIIIMMENtftfillik 0 a W z J 400 390 380 370 360 d W z J 350 F 2 340 330 320 42ND 54+83.73 22.00' LT 42ND 54+86:73 25.00' LT 50.00' LT MATCH EXIS 0 0 6+16.07, 25.07' LT 42ND 56+13.00, 22.00' LT 42ND 56+07.00 22.00' LT 42ND 56+04.00 25.00' LT _FJLL---CUT GLLT_ - v F' 0 =J !®r Miff= ®118* q ®!r ism* it ,,alt ir 1'` FILL FILL - 0 "'kxxx--"•xxx� i � I 1 111 I -I -I XI -I -I I -.1-I 1iiii - 4 1 I f t o `i� I I I 1-I�1�1�1�1�1�1�1-I ---_-----� 1. 1-1-1- 1 ., I - I i� tl 2ND 57+15.64 18. Ifi ' RT n T � 1-1-o 1 2ND 57+12.14 14.50' R fi I t 42ND 56+92.29, 29.48' RT + ��i END 12 t I t 1 42ND 56+82.77 39.72' RT �!� _i of BEGIN 12 I ;GTI L FIL TI SEE DWG ID -2 FOR 11 r� INTERSECTION DETAILS 2ND 57+15.46 14.50' LT I 1 42ND 57+18.96 18.00' LT` 1 1 1 1 + - GUT O FI• �fflanigaigi 2ND 53+30.90= DWY2-1 210+00.00 0 H 42ND 53+62.42= DWY2-3 230+00.00 48.00' RT 50.00' RT MATCH EXIST MATCH EXIST 42ND 54+11.43= DWY2-4 240+00.00 46.00' RT MATCH EXIST SEEM PVD -1 FILL FILL FIL 2ND 54+80.00 END BEGIN 00 42ND 55+66.82 DWY2-7 270+00.00 38.00' RT MATCH EXIST FILL 42ND 56+ '6.43 14.50' R' 42ND 56+19.89 29.24' RT BEGIN 42ND 56+29.45 38.63' RT ENDS 0 FL 1 1 WE NOTE 2 0 0. :.1 PROFILE GRADE L=300.00' EXISTING GROUND LEFT FLOWLINE ELEVATION, TYP In+1 1+^1 (11 1 - RIGHT FLOWLINE ELEVATION, TYP 10'10 D. M M 0 + 1t 10 to TLJ ‘41.. sD P1 0 N If N -9.03% > O N 3 .n[1 1 W W Q Al01 + n �A + LIA -7.30% > W -6.83% > n t0 0 J W O G O 7.44% > 0 f�1 '4* 10 0, O Ian 4a M fin M f•1 54+00 55+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by 014 JAW decked MGI PG Mq field Gro 56+00 CH2MH 1 LL® 57+00 42.00' LT MATCH EXIST NOTES: • 1. FOR GENERAL NOTES, CONSTRUCTION NOTES, AND LEGEND SEE DWG PVN -1. 2. SEE DWG IG -2 FOR INTERSECTION GRADING a WITHIN THE FULL DEPTH PAVEMENT LIMIT, THE PAVEMENT SECTION SHALL BE THE SAME AS SHOWN IN SECTION 40 3. FOR CURVE DATA, CURB RAMP, AND CURB RETURN ELEVATIONS, SEE INTERSECTION DETAILS DWG ID -2. W z J _ 1- DRIVEWAY # STATION OFFSET WIDTH CITY OF TUKWILA STD DWG DWY2 - 1 42ND 53+30.90 RT 10' RS -08B DWY2 - 2 42ND 53+88.44 LT 20' RS -08B DWY2 - 3 42ND 53+62.42 RT 20' RS -08B DWY2 - 4 42ND 54+11.43 RT 27' RS -08B DWY2 - 5 42ND 54+63.24 LT 15' RS -08B OWY2 - 6 42ND 55+24.10 LT 15' RS -08B OWY2 - 7 42ND 55+66.82 RT 18' RS -08B DWY2 - 8 42ND 57+76.26 LT 12' RS -08B MATCH LINE PV3 42ND 57+80 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING PLAN AND PROFILE 0 20 40 SCALE IN FEET aw revisions 12 52) file no PV -2 scab 1'=20' L• rT . 0 L data 911912014 • P • L -J 42ND 57+98.00, 25.00' LT 42ND 57+95.00, 22.00' LT 42ND 57+89.00, 22.00' LT 42ND 57+86.00, 25.00' LT II 11 11 11 42ND 58+39.18, 39.00' LT 42ND 58+46.10, 28.48' LT 39.00' LT MATCH EXIST, SEE1\ 42ND 58+91.67 29.64' LT 42ND 58+91.83, 25.00' LT /BEGIN 10 11 42ND 59+59.81, 22.00' LT 42ND 59+65.81, 22.00' LT 42ND 59+68.81, 25.00' LT SEE DWG DVD -1 FOR ENLARGEMENT SEE DWG DVD -1 FOR ENLARGEMENT 42ND 61+29.25, 22.00' LT END TAPER 42ND 61+80.25, 22.00' LT BEGIN TAPER 42ND 61+90.25, 25.00' LT END TAPER 40.00' RT MATCH EXIST 350 340 330 320 310 300 290 280 270 MATCH LINE PV2 42ND 57+80 35.00' RT MATCH EXIST 34.00' RT MATCH EXIST 30.00' RT MATCH EXIST 27.00' RT MATCH EXIST NOTES: a H WALL RW -3R, SEE DWG RT -2 O 0 0 + '9.06% > O J w 0 In '9.46% > M W -10.39% > 0 en 5; M 01 I0 5 01 >n E. 0.61%> 0 t LEFT FLOWLINE ELEVATION, TYP N et r71 M CV M oro M M ROFILE GRADE 0 J W RIGHT FLOWLINE ELEVATION, TYP N N,1- N N M:m N M 66+1,'4 O r N -12.78% > «4 ui J w 0 O -13.1 N b+ 0. 0 + w 18%> EXISTING GROUND , 3 vi co i0 M`� u•;, N 0 0 1+1. 64 0 1.M J W -13.8 3 o J W 0 0 3,76% 0. N CO IN.f 001 N.N N Yf N J W + O O ID C1 N '13.7%> J W O O YI N f0 13 78% m N -J w a LsiN M N N N 0 A N 3 N0 1� N 58+00 59+00 PUBLIC WORKS DEPT. 60+00 -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- dab dabrbd KRW MGJ CVivg proide hid bl no 61+00 CH2MH I LL® 62+00 1. FOR GENERAL NOTES, CONSTRUCTION NOTES, AND LEGEND SEE DWG PVN -1. DRIVEWAY # i' PVD -1' I I 42ND 61+19.25, 25.00' LT i OFFSET 42ND 59+56.81 25.00' LT' :0 BEGIN TAPER CITY OF TUKWILA STD DWG 11 ; 42ND 57+96.53 O 14' O 0 DWY3 - 2 a = 1 RT 15' RS -08B DWY3 - 3 42ND 58+56.10 LT 20' RS -08B + ,7,_� #IL " 'EJ RT 24' CUT va � - --_FILL--- ---TIP :_ RS -086 „. ` LT 34' 511.1.1111441 42ND 60+05.93 _ 20' RS -08B DWY3 - 8 111116 LT 30' RS -09 0/1y) / /(7 / ///' 94 1( A /I ///2") / ' I . /447/ if, I . /74 1r // 9 149 72,1/ .. ��. ' -C irk • ..'.•,. -y'- J. • - .,. _ _• n - - .�. - v-' Lw ::t a � '• -.• _ '• .. -:• M FILL � 3 , tT FILL PI FRL 1 -ILL (LL M O 1. F' i O I O M1 0 aw.+- 40.00' RT MATCH EXIST 350 340 330 320 310 300 290 280 270 MATCH LINE PV2 42ND 57+80 35.00' RT MATCH EXIST 34.00' RT MATCH EXIST 30.00' RT MATCH EXIST 27.00' RT MATCH EXIST NOTES: a H WALL RW -3R, SEE DWG RT -2 O 0 0 + '9.06% > O J w 0 In '9.46% > M W -10.39% > 0 en 5; M 01 I0 5 01 >n E. 0.61%> 0 t LEFT FLOWLINE ELEVATION, TYP N et r71 M CV M oro M M ROFILE GRADE 0 J W RIGHT FLOWLINE ELEVATION, TYP N N,1- N N M:m N M 66+1,'4 O r N -12.78% > «4 ui J w 0 O -13.1 N b+ 0. 0 + w 18%> EXISTING GROUND , 3 vi co i0 M`� u•;, N 0 0 1+1. 64 0 1.M J W -13.8 3 o J W 0 0 3,76% 0. N CO IN.f 001 N.N N Yf N J W + O O ID C1 N '13.7%> J W O O YI N f0 13 78% m N -J w a LsiN M N N N 0 A N 3 N0 1� N 58+00 59+00 PUBLIC WORKS DEPT. 60+00 -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- dab dabrbd KRW MGJ CVivg proide hid bl no 61+00 CH2MH I LL® 62+00 1. FOR GENERAL NOTES, CONSTRUCTION NOTES, AND LEGEND SEE DWG PVN -1. DRIVEWAY # STATION OFFSET WIDTH CITY OF TUKWILA STD DWG DWY3 - 1 42ND 57+96.53 RT 14' RS -08B DWY3 - 2 42ND 58+42.45 RT 15' RS -08B DWY3 - 3 42ND 58+56.10 LT 20' RS -08B DWY3 - 4 42ND 59+04.44 RT 24' RS -08B DWY3 - 5 42ND 59+60.54 RT 20' RS -086 DWY3 - 6 42ND 59+91.64 LT 34' RS -08B DWY3 - 7 42ND 60+05.93 RT 20' RS -08B DWY3 - 8 42ND 61+59.25 LT 30' RS -09 MATCH LINE PV4 42ND 62+30 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING PLAN AND PROFILE 0 20 40 SCALE IN FEET dm revisions • 13 52• , fib no PV -3 scale 1•=20' • ;.1.4 date 8119/2014 • . `.l LI 42ND 62+82.98, 22.00' LT END TAPER 42ND 62+72.98 25.00' LT BEGIN TAPER 300 290 280 270 260 250 240 230 220 42ND 63+39.46, 25.00' LT END TAPER 42ND 63+29.46, 22.00'.LT BEGIN LTARER.____._J SEE DWG DVD -1 FOR ENLARGEMENT —\ • • • ♦ ♦ 42ND 63+84.'27= ♦DWY4-3 430+00•.00 ♦ ♦ 42ND 65+50:Q0, 25.00' LT BEGINTAPER.., 412ND 65+50.00, 18.00' LT ND 65+53. 44.50' LT 42ND 65+65.00 21.00'LT END TAPER M N 91 0. W Z J 2 1- MY . 0 WALL RW -4R, SEE DWG RT -2 11131111125MIN IMINIMILMEIREINEM - ? W PILL1111, 6'' FILL II 42ND 63+92.94= DWY4-4 440+00.00 42ND 65+25.82= ii DWY4-5 450+00.00; If: ; 42ND 63+42.59= DWY4-2 420+00.00 ♦ • `♦ 42ND 66+1000 2f 0' A- . • END TAPER: ♦ 50.00' RT MATCH EXIST 50.00' RT MATCHI EXIST, SEEM PVD -1 0 A N fo -14.205‘g:- a 0 O 1- O N J C n W f0 N "144096 > w 0 • • 42ND 65+943.50 14.50' RT 42ND 65+95.00, 18.00' RT 42ND 65+95.00, 23.00' RT BEGIN TAPER ' Io 0 z H LINE PV3 N LEFT FLOWLINE ELEVATION, TYP CO N + ID 3-11%-> 8 N .13 07% EXISTING GROUND tel O0 N'• N ID N -1370% 3 CO Ifs CO a N -13 8 > PROFILE GRADE N O A D. O N 0 DI O D.J N4 Nco in -13.79,> w 4,N 12.4996 > w RIGHT FLOWLINE ELEVATION, TYP 10 N ID N V ID N 0 ID N N N N N N M 0 O X to N 0:1 in N ± 1.45.% >.. l fo > -9.54% ------------------- SR 518 + NOTES: 1. FOR GENERAL NOTES, CONSTRUCTION NOTES, AND LEGEND SEE DWG PVN -1. DRIVEWAY # STATION OFFSET WIDTH CINOF TUKWILA STD DWG DWY4 - 1 42ND 63+07.98 LT 20' RS -08C DWY4 - 2 42ND 63+42.59 RT 12' RS -08B DWY4 - 3 4211D 63+84.27 LT 20' RS -08B DWY4 - 4 42ND 63+92.94 RT 12 RS -08B DWY4 - 5 42ND 65+25.82 RT 31' RS -08B W Z J x CO 9,1 N to O O N meri N 7.97% 10 1+1 enN M N O A.O N O t0 N N E. J O -7.92% > tD Cri N 100.81/1 1 NDN N N 63+00 64+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by 4� 4.4 KRW decked �.6I FUM vel en 65+00 CH2MHILL. 66+00 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING PLAN AND PROFILE 0 20 40 SCALE IN FEET 41de revisions ' 14 52 fib no PV -4 scale 1"=.20' 4e 0.4 w L . EL dale 9119/2014 -`l 42ND 67+10.00 18.00' LT 42ND 67+06.50, 14.50' LT 42ND 67+00.00 21.00' LT BEGIN TAPER §3 S 280 270 260 250 0 z N 240 d 230 220 210 200 MATCH LINE 42ND 67+10.00, 23.00' LT ND TAPER 42ND 67+70.00 00' LT -.-N...TAI'ER 42ND 67+70:00 18.00`'-.T' 42ND 67+73.50 14.50' LT 42ND 67+80.00, 21.00' LT END TAPER 24.00' LT MAT H EXIST 42ND 69+34.68 24.00' LT BEGIN m 42ND 69+00.00, 11.00' LT END 1 42ND 69+94.81 24.00' LT AP 42ND 69+94.81, 21.00' LT BEGIN TAPER 42ND 70+04.63 24.93' LT END CD z rc� i•. � ia3.. 42ND +94 L u7 ��, — — — — --s, ` °` \ �Y Ftit .• i 44 o ° liii* 'I • FILL FILL FILL 42ND 68+00.00'-10.50' RT END O LL FILL FILL FILL FILL Q L.J 42ND 69+55.21 23.00' RT BEGIN m FILL 42ND 69+65.11 22.00' RT AP P1 42ND 69+85.00 0.00' LT END O BEGINO n 96 14.00' LT .t WALL RW -4L, SEE DWG RT -2 42ND 70+81.20 24.54' LT AP 3144 Com. SEE DWG CV -1 FOR CULVERT PLAN AND PROFILE SR 518 0 0 N SD -6.42% > 0 N N 0 O N w a -5.66% > M G t0 N + s+i sO N —111 W -4.79%>w -4.45% O PROFILE GRj4DE a O N N O+p N sp a. w -3.15% > 001 Ill N LEFT FLOWLINE ELEVATION, TYP 00 V1 N A v v v N N M N RIGHT FLOWLINE ELEVATION, TYP N tai N O 4N N I0 O O te to NCO 40 -J w -1.84% r NDN 140 Cal (00 000 0D N O O ot:0l Ol N ONVIN N N 4V 4V N 00 00 N J O p OCP VP cr. cn O N O N t0 0 -1.7.1.%. w--7,66% > 0 0i N O O. . °D te co ro N t0 %- 0 0 + 01 k0 J • wLLI 00 0'. in 001 0G 00 NN N f � 1 I � 1nJ M 1 - 42ND 70+25.33 22.00'RT END( (3 , NOTES: 1. FOR GENERAL NOTES, CONSTRUCTION NOTES, AND LEGEND SEE DWG PVN -1. 42ND 71+16.87 19.00' LT END OTOV (MATCH EXIST) 42ND 71+16.77 END CONSTRUCTION 42ND 71+16.82 END( (MATCH EXIST) 18.91' RT END GOTO 42ND 70+93.73 24.61' RT END TAPER 42ND 70+30.48 21.00' RT BEGIN TAPER (MATCH EXIST) DRIVEWAY # TI STAON OFFSET WIDTH CITY OF TUKWILA STD DWG DWY5 - 1 42ND 68+01.25 LT 18' RS -08C 0 O .o. n CO O p.:G N A N r•- ...Ia. Jy� d J d =0.60°/0 >. w -0.734 O 040 40 O °' 000 A ► +a A G O p A N N N N W C J 00 y.1.i. 0h. ..1.4 9%.. ._.W.. -- ° 03°0 413N - > s0 0 1- N 0D N 00 N A N 67+00 68+00 PUBLIC WORKS DEPT. 69+00 -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by d-ip-d atw checked MGI FOR maw RAM PROPOSED CULVERT, SEE DWG CVA FOR PROFILE 10010 ,n u, n1A n• r• h A n: r: 00 N .N N N N N N 70+00 EXISTING GROUND CH2M H I LL® te 00 N O 01 N N 01 N 71+00 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING PLAN AND PROFILE 0 20 40 SCALE IN FEET revisions 15" 52, Se rro PV -5 scale 1'=20' date 8/19/2014 PROVIDE SEAL AND SAND COVER OVER JOINT, EXTEND 6" EACH SIDE OF JOIN EXISTING ROAD 2" MIN TO 3" MAX LENGTH VARIES PLANING BITUMINOUS PAVEMENT/ OVERLAY JOINT DETAIL NTS PROVIDE SEAL AND SAND COVER OVER JOINT 12" PV -2 SAWCUT EXISTING AC BACK TO REVEAL 12" MIN UNDISTURBED EXISTING BASE 4" HMA CL VY' PG 64-22 UNDISTURBED EXISTING BASE COURSE MATCH LINE AS CALLE OUT IN ALIGNMENT AND PAVING SHEETS 2" MIN OVERLAY 6" CRUSHED SURFACING BASE COURSE DRIVEWAY PAVEMENT MATCH DETAIL ( NTS PV -2 TO PV -4 EXTRUDED CURB, TYPE 6 SEE WSDOT STD PLAN F-10.42-00 4" HMA CL l'2" PG 64-22 1.5' (MIN.) SEE PAVING PLAN AND PROFILE FOR TREATMENT OF PLANTER AREAS 6" CRUSHED SURFACIN BASE COURSE EPDXY ADHESIVE ANCHORING METHOD SHALL BE USED DRIVEWAY PAVING SECTION NTS PV -1 TO PV -5 SIDEWALK END POINT SHOWN IN ALIGNMENT, PAVING AND GRADING PLANS CEMENT CONCRETE SIDEWALK HMA CL 14" PG 64-22 1111E- 111____ y 1= EXISTING SURFACE 12 AC CURB RAMP DETAIL NTS TO BE DEVELOPED IN 90% PAVER DETAIL (-11 PV -1 AND PV -2 NTS PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by d. drignod MNK KRW Fwi RAM fifdbkno PV -1 AND PV -5 CH2M H I LL® Y-4" SHARROW SYMBOL r NOTES: ALL ROUNDED CORNERS SHALL HAVE A 1" L RADIUS NTS CH -1 AND CH -6 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING AND GRADING DETAILS EkY revisions L CM) 16, 52, Se no PVD -1 scale date 8119/2014 L N 42ND o 375 370 36A0+00 L =20.00' G1 =-7.00% z G2 =11.13%a c, i= c! u) IA It; (0X evi 71 in I 24 w a; A IJJ Ill 380 -i 375 fral 0 co IC >w EXISTING ; PROFILE GROUND GRADE ; 230+25 230+50 DRIVEWAY 2-3 Y L. =10.00' G1=-8.50% 11 0 G2 =1.34% iiiz 0 a o a a a a C! 2 a a 42ND co c± eiri m0 0 X e'4! co : I 0., r; a ul+ 4 ui c. LL 04 en 0 t '4 Oii 0(1 co 385 380 1; us-ImA3.50% ';:i >ea -l- ilijmN.P- 111: 114;4- ; -1>B:c4 u3:12Z4 -------- *IC- --------------- ---------- PROFILE _6.46% 375 GROUND 370 GRADE 210+00 210+25 210+50 DRIVEWAY 2-1 _1 g it 0 a 42ND RI a, 0 q U. el P.I cn PROFILE c‘i w GRADE a P c= • w D 405 ; in I? 4 O. —t O. _i 400 10 SO e— el ‘— eft e— ves 19 395 ----------- ----- - -3- - - - _ --------------- ; ---------- E -I Fr- 6.71: "is -°°4••• . - - ---- • • › 111> eig 395 390 - \- EXISTING ; -10.00% - 390 - 385 . GROUND 110+00 120+25 120+50 120+75 DRIVEWAY 1-2 370 365 230+75 385 380 375 210+n0 L. =10.00' 4 G1 =-8.50% G2 =1.09% 42ND op o co q c. CO q M R coo 3 +1.. 275 °gal,- cti A 1 270 I o €'• it LI- t.,CtIL If N in >_.II a.- -Jel 265 }...---__ .....—„-_,-_,......:- 260 • ••EXISTING PROFILE GROUND GRADE 25410'+00 1- 0 co 42ND N 0 t, 420+25 420+50 DRIVEWAY 4-2 a In 0 z vi a o • cd t-• ,n DILI • + 0, Q_•_• 360 i -4—T"T 0. _r - > LIJ a. ...I N A 0 p... co w 1— \- 350 EXISTING PROFILE i GROUND ' GRADE 3S0'+00 270+25 270+50 DRIVEWAY 2-7 42ND c. 380 375 370 L. =10.00' G1 =1.00% G2 =13.06% a 365 ---- EXISTING 360 GROUND 240+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by deb 240+25 dram K R W Mocked EWH FR KKR 0010 PROFILE GRADE : - — ' 360 275 42ND 270 250 265 245 260 240 '— EXISTING 231 GROUND 450+00 450+25 L. =10.00' G1 =2.00% G2 =12.52% Y 0 _1 z ..si 1= a a a a . U) 0 00 0 et at la (0q� o m pnw44 o s 7t. YI + zi;...' m V ,^j. S g ii ('1 0 SC et .4' -,t NI• le t) rc g; ""1 w 2 r ecc) a- -E >J 0._j W> Ili 'mw»» al in 0° 1 420J+R5 250 245 PROFILE GRADE /35 450+50 450+75 DRIVEWAY 4-5 Y J g It 0 a 0 CO q z 42ND0en pi m o 1; ul PROFILE ca 6 ra x 360 265 3 fi I O GRADE Mu.; 5 03 ▪ > al cv i 1— 355 260 -15.00% a. ...1 < • i - - --------- ----- > tu 2 --; 350 255 --- EXISTING , 5 250 GROUND 44 ; 270+g 440+00 ...1. 0+25 440+50 380 375 370 365 240+50 240+75 DRIVEWAY 2-4 CH2MH1LL. DRIVEWAY 4-4 L. 2742ZD 265 01.N 03 reE O. —I CO> W ° C4 git 0 G2 =-:::121:9.0050' 0 :000%%GI : Etn3 Tr?, 265 270 0 w IA RW - -15 WW 260 260 • 265 r • 260 ' 255 440+R° 111.11. 255 - 2Q00 EXISTING - PROFILE 255 GROUND GRADE 230 430+75 430+25 430+50 DRIVEWAY 4-3 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRIVEWAY PROFILES I 17 1/4.. 52, fle na DV -1 L revisions scale 11.20' date 8/19/2014 7 j "-1 j a 42ND 59+62.28, 42.00' LT 42ND 59+62.28, 29.77' LT END 10 42ND 59+69.28 30.27' LT PT 42ND 59+74.64, 25.00' BEGIN 10 PC 42.00' LT MATCH EXIST, SEE M PVD -1 7' R 5' R 0 42ND 60+15.64, 35.30' LT 42ND 60+22.08, 42.00' LT ° +00 42ND 62+99.64, 28.33' LT 42ND 62+93.63, 29.00' LT BEGIN 42ND 62+69.52, 29.00' LT END( 10 42ND 62+69.67, 25.00' LT -;,. BEGIN 10 NOTES: 1. FOR GENERAL NOTES, CONSTRUCTION NOTES, AND LEGEND SEE DWG PVN -1. 2. FOR PAVING INFOMATION, SEE PAVING PLAN AND PROFILE PLAN SHEETS. 42ND 60+22.08, 35.30' LT END 10 42ND 60+08.64 28.30' LT PC 42ND 60+08.64 25.00' LT BEGIN 42ND 63+04.30, 46.00' LT END • 42ND 63+17.98, 22.00' LT BEGIN 10 46.00' LT 42ND 61+40.18 32.44' LT PT 42ND 61+38.54, 35.00' LT 42ND 61+38.54, 32.75' LT END 10 42ND 61+44.25, 27.53' LT PC 42ND 61+44.25, 22.00' LT BEGIN( l 10 rj 5'R a 35.00' LT , MATCH q(IST, SEEM PVD -1 5' R 42ND 61+83.94, 35.00' LT 42ND 61+79.25, 29.21' LT PT 42ND 61+83.94, 29.21' LT MATCH EXIST 42ND 63+04.30, 46.00' LT 42ND 63+69.27 34.95' LT PT 0 END 10 WALL RW -3L SEE DWG RT -1 42ND 63+39.17, 50.00' LT /5c5 42ND 63+39.17, 34.95' LT END i o 50.00' LT MATCH EXIST, SEE M PVD -1 I I I 5' R 42ND 63+74.27, 29.95' LT PC 42ND 64+07.96 50.00' LT 42ND 64+11.46 37.51' LT 42ND 63+74.27 25.00' LT BEGIN(10 4 " a a PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by Ole dawn Bladed MGI renaea pIu renal eyM bk no CH2MH 1 LL® /4 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRIVEWAY DETAILS END 10 42ND 61+74.25, 24.21' LT PC 42ND 61+74.25 22.00' LT BEGIN 42ND 64+43.94, 35.07' LT 42ND 64+43.94, 25.00' LT no revisions 18-\ 52 Ne no DVD -1 scale 1•=20' dale 8/19/2014 k.3 42ND 50+14.02, 65.59' LT BEGIN (MATCH EXIST) BEGIN®(MATCH EXIST) 11.76' 8' S.160TH ST 42ND 50+14.65 38.6 CURB RAMP 1 -x- CURVE A _42ND 5n+35,9 5000 42ND 50+$3.71 17.8 B RAMP 211 RAMP 31 CURVE B 42ND 50+56.62 23.00' RT END TAPER 42ND 50+44.62 20.44' RT BEGIN TAPER 42ND 50+15.17 43.06' RT 42ND 50+13.80 60.05' RT_- END BEGIN 0 10 20 SCALE IN FEET 11.67' RB RAMP 4 42ND 50+13.44, 66.04' RT BEGIN(?)(MATCH EXIST) BEGIN (MATCH EXIST) N PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- War o-. s q8W checked pro] ging RAA w fl dbkno CURB RAMP 1 - TOP OF CURB ELEVATIONS LOCATION STATION OFFSET ELEV DESCRIPTION O 50+14.09 55.59' LT 421.20 TOC WING O 50+14.36 40.60' LT 419.77 TOC RAMP BOTTOM 0 50+15.08 36.66' LT 419.69 TOC RAMP BOTTOM 0 50+17.82 29.65' LT 419.19 TOC WING OS 50+24.84 33.48' LT 419.34 BACK OF WING O6 50+22.97 38.10' LT 419.73 BACK OF RAMP O 50+22.25 42.04' LT 419.81 BACK OF RAMP 0 50+22.09 55.64' LT 421.24 BACK OF WING CURB RAMP 2 - TOP OF CURB ELEVATIONS LOCATION STATION OFFSET ELEV DESCRIPTION O9 50+21.73 24.09' LT 418.44 TOC WING 10 50+34.02 15.77' LT 416.46 TOC RAMP BOTTOM 71 50+37.87 14.67' LT 416.38 TOC RAMP BOTTOM 12 50+44.16 14.00' LT 416.09 TOC WING 13 50+27.71 29.40' LT 418.48 BACK OF WING 14 50+36.22 23.48' LT 416.61 BACK OF RAMP 15 50+40.07 22.38' LT 416.53 BACK OF RAMP 16 50+44.16 22.00' LT 416.41 BACK OF WING CURB RAMP 3 - TOP OF CURB ELEVATIONS LOCATION STATION OFFSET ELEV DESCRIPTION 17 50+43.57 14.54' RT 416.09 TOC WING 18 50+35.51 16.99' RT 416.52 TOC RAMP BOTTOM 19 50+31.95 18.81' RT 416.60 TOC RAMP BOTTOM 20 50+21.25 28.57' RT 418.27 TOC WING 21 50+26.12 32.07'RT 418.30 BACK OF WING 22 50+34.70 24.16' RT 416.72 BACK OF RAMP 23 50+38.26 22.34' RT 416.64 BACK OF RAMP 24 50+44.62 20.44'RT 416.20 BACK OF WING CURB RAMP 4 - TOP OF CURB ELEVATIONS LOCATION STATION OFFSET ELEV DESCRIPTION 25 50+18.20 33.68' RT 418.82 TOC WING 26 50+15.57 41.10' RT 419.21 TOC RAMP BOTTOM 27 50+14.89 45.04' RT 419.29 TOC RAMP BOTTOM 28 50+14.04 56.06' RT 420.10 TOC WING 29 50+20.03 56.42' RT 420.13 BACK OF WING 30 50+20.82 46.06' RT 419.32 BACK OF RAMP 31 50+21.49 42.12' RT 419.24 BACK OF RAMP 32 50+23.59 36.31'RT 418.85 BACK OF WING CH2MHILL. CURB RETURN "A" - FLOWLINE ELEVATIONS LOCATION STATION OFFSET ELEV PC 50+14.16 43.80' LT 420.00 1/4 50+16.51 32.38'LT 419.19 1/2 50+23.02 22.72'LT 417.90 3/4 50+32.73 16.27' LT 416.60 PT 50+44.16 14.00' LT 415.59 CURB RETURN "B" - FLOWLINE ELEVATIONS LOCATION STATION OFFSET ELEV PC 50+14.79 46.07' RT 419.34 1/4 50+18.24 33.60' RT 418.48 1/2 50+25.98 23.24' RT 417.28 3/4 50+36.95 16.39' RT 416.34 PT 50+49.67 14.00' RT 414.91 • CURVE DATA CURVE # DELTA RADIUS TANGENT LENGTH CURVE A 89°37'10" 30.00' 29.80' 46.92' CURVE B 85°11'60" 35.00' 32.18' 52.05' NOTES: 1. FOR GENERAL NOTES, CONSTRUCTION NOTES, AND LEGEND SEE DWG PVN -1. 2. FOR ALIGNMENT INFORMATION, SEE SURVEY CONTROL PLAN SHEETS. 3. FOR GRADING INFOMATION, SEE INTERSECTION GRADING PLAN SHEETS. CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III INTERSECTION DETAILS revisions 19 52, file no I2-1 scale 1'=20' date 8119/2014 r� .�J ._ r • • _J .r 71.00' LT END® (MATCH EXIST) 42ND 56+46.37, 58.29' LT END Op® , BEGIN®, SEE Qt �J PVD -1 42ND 56+46.42, 44.00' LT END ®® , BEGIN 3 0 42ND 56+44.12, 32.49' LT© C RB RAMP 5 42ND 56+70.42 58.29' LT BEGIN 3 7 9 , SEEM PVD -1 11.95' N H a Ln u) m 19 CURVE CURVE C# 42ND 56 ENDS® BEG Ni, 12-00-0-00 LT CURVE DATA CURVE # DELTA RADIUS TANGENT LENGTH CURVE C 90°00'19" 30.00' 30.00' 47.13' CURVE D 90°00'00" 30.00' 30.00' 47.12' CURVE E 90°00'00" 30.00' 30.00' 47.12' CURVE F 89°59'41" 30.00' 30.00' 47.12' .42ND 56+70.42, 49.29' LT 0 EN9®' BEGINC9 6 42ND 56+72.02, 34.35' LT CURB RAMP 7 �\_ 37 Mt. 43 0 kill* 0 4171 42ND 55+94.66, 14 56' L PAMQ-B- 57 0 42ND 57+03.64, 22.00' LT BEGIN TAPER �,,t,„,' 29 42ND 57+14.64, 25.00' LT /END TAPER `a e d l 0 42N A CURVE 42ND 56+44.14 CJJRB RAMP 6 co +I `'z®n 32.50' RT ® umm co ® r 42ND 56+46.43 44.00' RT END BEGIN® 42ND 56+46.43, 57.00' RT END(()7 BEGIN®, SEE Qt PVD -1 0 10 20 SCALE IN FEET 42ND 56+95.16, 4.47 T CURVE F 0 01111 0 440, thri m0 m�m 42ND 56+72.07, 34.20' RT RB RAMP 10 RAMP -9 r- - 42ND 56+70.42 49.00' RT END BEGIN 00 42ND 56+70.42 57.00' .00' RT BEGIN�iY, o 85.00' RT ENDO SEE MATCH EXIST PVD -1 42ND 57+08.00 0.00' LT END O BEGIN® 42ND 57+15.64 23.00' RT END TAPER 42ND 57+03.64 21.50' RT BEGIN TAPER NOTES: 1. FOR GENERAL NOTES, CONSTRUCTION NOTES, AND LEGEND SEE DWG PVN -1. 2. FOR ALIGNMENT INFORMATION, SEE SURVEY CONTROL PLAN SHEETS. 3. FOR GRADING INFOMATION, SEE INTERSECTION GRADING PLAN SHEETS. PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by d. deiGoad tram cheated MGI ore .0 poi ds RIM CURB RAMP 5 - TOP OF CURB ELEVATIONS LOCATION STATION OFFSET ELEV DESCRIPTION O1 56+46.21 40.43' LT 346.27 TOC WING ® 56+38.83 36.86' LT 346.40 BACK OF RAMP ® 56+35.13 38.39' LT 346.47 SIDEWALK AP ® 56+33.60 34.70' LT 346.54 SIDEWALK AP ® 56+37.29 33.16' LT 346.47 BACK OF RAMP ® 56+33.61 19.41' LT 347.68 TOC WING O7 56+43.29 30.67' LT 346.06 TOC RAMP BOTTOM ® 56+44.83 34.36' LT 345.98 TOC RAMP BOTTOM CURB RAMP 6 - TOP OF CURB ELEVATIONS LOCATION STATION OFFSET ELEV DESCRIPTION ® 56+33.63 19.42' RT 347.63 TOC WING 10 56+37.30 33.17' RT 346.46 BACK OF RAMP 11 56+33.61 34.71' RT 346.53 SIDEWALK AP 12 56+35.14 38.40' RT 346.46 SIDEWALK AP 13 56+38.84 36.87' RT 346.39 BACK OF RAMP 14 56+46.22 40.45' RT 346.08 TOC WING 15 56+44.84 34.38' RT 345.91 TOC RAMP BOTTOM 16 56+43.31 30.68' RT 346.00 TOC RAMP BOTTOM CURB RAMP 7 - TOP OF CURB ELEVATIONS LOCATION STATION OFFSET ELEV DESCRIPTION 17 56+70.42 45.29' LT 344.86 TOC WING 18 56+71.44 36.27' LT 344.47 TOC RAMP BOTTOM 19 56+72.72 32.48' LT 344.39 TOC RAMP BOTTOM 20 56+75.27 27.66' LT 344.46 TOC WING 21 56+81.98 32.01' LT 344.50 BACK OF WING 22 56+80.32 35.06' LT 344.52 BACK OF RAMP 23 56+79.04 38.85' LT 344.60 BACK OF RAMP O 56+78.42 45.29' LT 344.90 BACK OF WING CURB RAMP 8 - TOP OF CURB ELEVATIONS LOCATION STATION OFFSET ELEV DESCRIPTION 25 56+79.76 22.25' LT 344.15 TOC WING 26 56+92.71 15.01' LT 343.16 TOC RAMP BOTTOM 27 56+96.64 14.24' LT 343.08 TOC RAMP BOTTOM 28 57+03.64 14.00' LT 342.76 TOC WING 29 57+03.64 22.00' LT 342.90 BACK OF WING 30 56+98.18 22.11' LT 343.23 BACK OF RAMP 31 56+94.25 22.88' LT 343.31 BACK OF RAMP 32 56+85.27 28.05' LT 344.18 BACK OF WING CH2M H I LL® CURB RAMP 9 - TOP OF CURB ELEVATIONS LOCATION STATION OFFSET ELEV DESCRIPTION 33 57+03.64 14.00' RT 342.78 TOC WING O 56+97.14 14.18' RT 343.07 TOC RAMP BOTTOM 35 56+93.20 14.88' RT 343.15 TOC RAMP BOTTOM 36 56+80.13 21.91' RT 344.08 TOC WING 37 56+85.20 27.43' RT 344.12 BACK OF WING 38 56+94.52 22.29' RT 343.27 BACK OF RAMP 39 56+98.46 21.59' RT 343.19 BACK OF RAMP O 57+03.64 21.50' RT 342.92 BACK OF WING CURB RAMP 10 - TOP OF CURB ELEVATIONS LOCATION STATION OFFSET ELEV DESCRIPTION 41 56+75.64 27.10' RT 344.35 TOC WING 42 56+72.78 32.34' RT 344.26 TOC RAMP BOTTOM 43 56+71.48 36.12' RT 344.18 TOC RAMP BOTTOM O 56+70.42 44.00'RT 344.34 TOC WING 45 56+77.92 44.00' RT . 344.38 BACK OF WING 46 56+78.59 38.57' RT 344.25 BACK OF RAMP 47 56+79.89 34.79' RT 344.33 BACK OF RAMP O56+81.83 31.32' RT 344.39 BACK OF WING . CURB RETURN "C" - FLOWLINE ELEVATIONS LOCATION STATION OFFSET ELEV PC 56+16.42 14.00' LT 348.60 1/4 56+27.90 16.28'LT 347.68 1/2 56+37.63 22.79' LT 346.77 3/4 56+44.14 32.52' LT 345.97 PT 56+46.42 44.00' LT 345.68 CURB RETURN "D" - FLOWLINE ELEVATIONS LOCATION STATION OFFSET ELEV PC 56+70.42 44.00' LT 344.52 1/4 56+72.71 32.52' LT 344.38 1/2 56+79.21 22.79' LT 343.85 3/4 56+88.94 16.28' LT 343.32 PT 57+00.42 14.00' LT 342.63 CURB RETURN "E" - FLOWLINE ELEVATIONS LOCATION STATION OFFSET ELEV PC 56+16.43 14.00' RT 348.57 1/4 56+27.91 16.28' RT 347.64 1/2 56+37.64 22.79' RT 346.72 3/4 56+44.14 32.52' RT 345.91 PT 56+46.43 44.00' RT 345.41 CURB RETURN "F" - FLOWLINE ELEVATIONS LOCATION STATION OFFSET ELEV PC 56+70.42 44.00' RT 344.01 1/4 56+72.71 32.52' RT 344.25 1/2 56+79.21 22.79' RT 343.79 3/4 56+88.94 16.28' RT 343.32 PT 57+00.42 14.00' RT 342.67 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III INTERSECTION DETAILS date revisions • 20 • 52, file no ID -2 seeks 1"=20' r . L ' rTe L date 8/19/2014 1 J r� ,. r .-.1 n tiJ r� 0 10 20 SCALE IN FEET PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by dab �� d dew checked KM cob MGI AJM aa� bk- CH2MH 1 LL® INTERSECTION GRADING CONTROL POINTS LOCATION STATION OFFSET ELEV CP1 50+50.00 14.00' LT 414.88 CP2 50+50.00 7.00' LT 415.02 CP3 50+50.00 0.00' LT 415.16 CP4 50+50.00 7.00' RT 415.02 CP5 50+50.00 14.00' RT 414.88 CP6 50+44.18 7.00' LT 415.70 CP7 50+44.20 0.00' LT 415.78 CP8 50+27.92 8.13' LT 417.32 CP9 50+30.03 8.20' RT 417.15 CP10 50+12.52 11.36' LT 418.94 CP11 50+14.00 11.62' RT 418.66 CP12 50+02.03 0.00' LT EXIST CP13 50+02.26 65.51' LT EXIST CP14 50+08.11 65.55' LT EXIST CP15 50+02.19 43.86' LT EXIST CP16 50+08.18 43.83' LT 420.47 CP17 50+02.11 21.93' LT EXIST CP18 50+09.31 27.16' LT 419.44 CP19 50+01.94 23.02' RT EXIST CP20 50+10.09 28.31' RT 418.97 CP21 50+01.85 46.03' RT EXIST CP22 50+08.32 46.05' RT 419.69 CP23 50+01.77 65.99' RT EXIST CP24 50+07.60 66.01' RT EXIST CP25 50+23.11 0.00' LT 417.99 NOTES: 1. CONTOURS DISPLAYED AT 0.1' INTERVALS ARE APPROXIMATE AND ARE PROVIDED FOR REFERENCE ONLY. 2. FOR ALIGNMENT INFORMATION, SEE SURVEY CONTROL PLAN SHEETS. 3. FOR PAVING INFOMATION, SEE PAVING PLAN AND PROFILE PLAN SHEETS. 1 r L • w L 4. FOR CURVE DATA, CURB RAMPS, AND CURB RETURN ELEVATIONS, SEE INTERSECTION DETAILS DWG ID -1 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III INTERSECTION GRADING PLAN dMb revisions X21 52 , fle no IG -1 scale 1'=20' date 81192014 n r� n J LJ J J CP39 CP42 CP17 co o vi CP16 CP15' 6ria idaVallii4 PAW at*sittaritill \\ =s1-4 1,kilt\ , k k ; r e rim" if / A / 1:111 A 14 d illit'AVi 1111114fr 'ft I Arg 40 r. , •„.itks's limori , If * .eagliP 0 10 20 SCALE IN FEET CP26 CP27 r CP2 CP3 CP4 INTERSECTION GRADING CONTROL POINTS LOCATION STATION OFFSET ELEV CP1 57+08.00 14.00' LT 341.92 CP2 57+08.00 7.00' LT 342.11 CP3 57+08.00 0.00' LT 342.34 CP4 57+08.00 7.00' RT 342.12 CP5 57+08.00 14.00' RT 341.94 CP6 57+00.42 7.00' LT 342.78 CP7 57+00.42 0.00' LT 342.92 CP8 57+00.42 7.00' RT 342.81 CP9 56+88.94 8.14' LT 343.56 CP10 • 56+88.94 0.00' LT 343.78 CP11 56+88.94 8.14'RT 343.56 CP12 56+80.00 14.00' LT 344.02 CP13 56+80.00 0:00' LT 344.44 CP14 56+80.00 14.00' RT 344.02 CP15 56+70.43 58.29' LT EXIST CP16 56+58.40 58.29' LT EXIST CP17 56+46.37 58.29' LT EXIST CP18 56+58.42 44.00' LT 345.10 CP19 56+58.42 32.52' LT 345.19 CP20 56+58.42 22.79' LT 345.36 C P21 56+57.50 14.00' LT 345.59 CP22 56+57.50 14.00' RT 345.59 CP23 56+58.43 22.79' RT 345.31 CP24 56+58.42 32.52' RT 345.08 CP25 56+58.42 44.00' RT 344.71 CP26 56+46.43 57.00' RT EXIST CP27 56+58.42 57.00' RT EXIST CP28 56+70.42 57.00' RT EXIST CP29 56+35.00 14.00' LT 347.20 CP30 56+35.00 0.00' LT 347.62 CP31 56+35.00 14.00'RT 347.20 CP32 56+27.90 8.14' LT 347.91 CP33 56+27.90 0.00' LT 348.14 CP34 56+27.91 8.14' RT 347.89 CP35 56+16.42 7.00' LT 348.80 CP36 56+16.42 0.00' LT 349.00 CP37 56+16.42 7.00' RT 348.78 CP38 56+12.00 14.00' LT 348.94 CP39 56+12.00 7.00' LT 349.12 CP40 56+12.00 0.00' LT 349.34 CP41 56+12.00 7.00' RT 349.11 CP42 56+12.00 14.00' RT 348.93 CP43 56+57.50 0.00' LT 346.01 NOTES: 1. CONTOURS DISPLAYED AT 0.1' INTERVALS ARE APPROXIMATE AND ARE PROVIDED FOR REFERENCE ONLY. 2. FOR ALIGNMENT INFORMATION, SEE SURVEY CONTROL PLAN SHEETS. 3. FOR PAVING INFOMATION, SEE PAVING PLAN AND PROFILE PLAN SHEETS. 4. FOR CURVE DATA, CURB RAMPS, AND CURB RETURN ELEVATIONS, SEE INTERSECTION DETAILS DWG ID -2 PUBLIC WORKS DEPT. -ENG I N EERI NG -STREETS -WATER -SEWER -PARKS -BU I LD I NG- bY dr doiamd tram KRW checked MGI WWW kldeknu CH2MH 1 LL® CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III INTERSECTION GRADING PLAN 22 52 fide no IG -2 asr revisions scale 1'=20' date 811912014 42ND 50+20.9 54.9' LT GV RELOCATE WATER VAULT BY OTHERS 42ND 50+37, 22.3' LT O I . 1 : �- 1 I 42ND 50+49.2 flpti 1 123.0' LT i GUY ANCHOR Isi lif�11.,\ L� �U&. 23.O' LT 1 �+ a X1 0. A., i XCUT -X- -X- -X- -X Ili itom__- ---Ai 42ND 51+75.7 23.0' LT 0 42ND 51+66.7 17.5' LT 42ND 53+25.0 23.0' LT OP . OP OP,y, — O'vr, IA 0 - 53+00 42ND AVE S. (1 CC w z J x 1- 0 0 til) BEGIN CONSTRUCTION 42ND 50+02.02 MATCH EXISTING 440 430 420 410 400 390 380 370 360 �. IO !I/ I GV p tOD L�Il �' Y WALL ND 0+47.0 22.5' RT ii. II I I:7 m 0 J 0 of ui - W N-QZ r-re� II Z� 1I CO ' 0Z.W COMCAST ao 0 PROFILE GRADE EXISTING GROUND 12" DIA; 1.=24' @ 11.43% 50+00 c.-.......,_ . v , of ' ?ulzwing �000v '040 a in ari 0,0-u1 al mrn '. al II mMM Z� 11 N 11 11 0 V v - W W W W W J 0 Z03 03� �r 0303 N" -'ONO ILICO CO a m Z 2 u n u V W W W W 18" DIA; L=70' @ 101% 51+00 52+00 18" DIA; L=60' @ 14.15% SEWER 6" DIA 18" DIA; L=58' @ 12.98% 53+00 0 enM LINE DR2 42ND S 1 - UTILITY CONSTRUCTION NOTES: O1 REMOVE EXISTING MANHOLE OR CATCH BASIN 02 REMOVE EXISTING PIPE TO LIMITS AS SHOWN OREMOVE EXISTING STRUCTURE AS SPECIFIED OABANDON EXISTING PIPE AND/OR CATCH BASIN ©®©®® CONNECT EXISTING PIPE TO NEW CATCH BASIN/MANHOLE CONNECT NEW PIPE TO EXISTING CATCH BASIN/MANHOLE CONNECT WALL UNDERDRAIN TO CATCH BASIN ADJUST EXISITING CATCH BASIN OR MANHOLE TO FINISHED GRADE ADJUST EXISTING UTILITIES CASTING TO GRADE ADJUST EXISTING UTILITIES CASTING TO GRADE BY OTHERS RELOCATE TIMBER UTILITIES POLE BY OTHERS RELOCATE FIRE HYDRANT ASSEMBLY INSTALL NEW FIRE HYDRANT ASSEMBLY RELOCATE WATER METER PROTECT UTILITY IN PLACE CONNECT AND EXTEND EXISTING PIPE TO NEW CATCH BASIN/MANHOLE CONNECT/ADJUST EXISTING PIPE TO NEW/PROPOSED DITCH PROPOSED POTHOLE LOCATION, SEE DRD-1 0 20 40 SCALE IN FEET PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- kr KWH drew KRW checked woi -s W CH2MH 1 LL® CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE AND UTILITY PLAN AND PROFILE • 23 ` 52, file no DR -1 e.~ revisions scale 1`=20' date 8/18/2014 _J 0 z v 0 W z J 1- 4 390 380 370 g 1I 0 360 ' 0 350 11 x U 340 330 320 0 0 WAIL RW -2L 0 033 WV I I M, I; 0 1 1 42Iy[) 54+20.7 23.Q' LT —I 1� `Fitt —=—T _ 411.1 • U L 42ND 56+32.9 39.9' LT 42ND 56+10.0 23.0' LT ' 00 • HYDRA VVM CD *OWv 0 :,© Op "'DP _—ar--ar--aTA lu= FILL 211=1:1M=IIMMFAM11120��l1 1-14 \' I 0 L FILL — FILL FILL aD © D 01 1-0 II 11 II 0 Nr 111 O EXISTING oi GROUND •4; ZWU) C1 i co. aAAFAroi� } II rnmrn Z2 11 11 11 m UvN. awww� 0 PROFILE GRADE; 42ND 55+45.0 17.5' RT FILLIP t1 033) NApia V - CD 0 WV 42ND 56+28.0 30.0' RT iw ST ST S - — — ' , 57+00-1 O 12 -GV 2-12 ST ST ST STd0— S WV I 0 z e 0 W z J x 1- 2 ' 18" DIA; L=78' © 5.00% 18" DIA; L=58' @ 12.98% ,,, Sewer 6" Dia 18" DIA; L=45' © 12.15% ,,,Sewer ,r Dia 18" DIA; L=180' © 10.05% Sew& 6" Dia 18" DIA; L=14' @ 11.00% 18" DIA; L=86' @ 6.80% 54+00 55+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by d. donignod EWH MOW voi RIM rod - field bit no 56+00 CH2M HILL. ce ro -aW Nzcsi -" O N a 1 w D o tt.. 74i 0i " Na QLI]al1 jjen rrnnrr+1 Fr U g Z 2 II II a ❑ Ug LLVE W W W 57+00 4 z UTILITY CONSTRUCTION NOTES: O1 REMOVE EXISTING MANHOLE OR CATCH BASIN 0 REMOVE EXISTING PIPE TO LIMITS AS SHOWN O3 REMOVE EXISTING STRUCTURE AS SPECIFIED O4 ABANDON EXISTING PIPE AND/OR CATCH BASIN OS CONNECT EXISTING PIPE TO NEW CATCH BASIN/MANHOLE O CONNECT NEW PIPE TO EXISTING CATCH BASIN/MANHOLE OCONNECT WALL UNDERDRAIN TO CATCH BASIN ADJUST EXISITING CATCH BASIN OR MANHOLE TO FINISHED GRADE 09 ADJUST EXISTING UTILITIES CASTING TO GRADE 10 ADJUST EXISTING UTILITIES CASTING TO GRADE BY OTHERS ® O@®@®® RELOCATE TIMBER UTILITIES POLE BY OTHERS RELOCATE FIRE HYDRANT ASSEMBLY INSTALL NEW FIRE HYDRANT ASSEMBLY RELOCATE WATER METER PROTECT UTILITY IN PLACE CONNECT AND EXTEND EXISTING PIPE TO NEW CATCH BASIN/MANHOLE CONNECT/ADJUST EXISTING PIPE TO NEW/PROPOSED DITCH PROPOSED POTHOLE LOCATION, SEE DRD-1 NOTES: 1. SEE SHEET DR -6 FOR CONNECTION BETWEEN STRUCTURES DR2-11 TO DR2-12. CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE AND UTILITY PLAN AND PROFILE 0 20 40 SCALE IN FEET no revisions 24 52 , New DR -2 scale 1'=20' •-4 F r- . 0 L date 811812014 m 1- N z v 0 W 0 z J x 1- 350 340 330 0 320 0 z N 310 0 w z 300 5 Q 2 290 280 270 II II II 1 TIMBER POLE HYDRANT 42ND 61+82.2 0 I5 POLE 11 42ND 58+84.0�� — 3-17 0 TEL "••' " 11 1t.5' LTO I 0 0 O_ ® f� 0 — -.- t �.v _.� s.s §r� - 1�M x `-:c--%�---* � __ `yI�r---_ CUT Js f —,In ----6-IL FILL FILL - 1!✓ -- OP --- OP `fit 0P QR S�L� ©H Q ae>•►* f� O E "r`" ...� S• " �� �.i - _ c =' x 137 r` _.,�,. )t( .�,,., w.°• + n �_. ! s, , 58+Ob\— ' — _ s _ ss s 59+00_"' .�� —� , M II• _ —. _ 60+00 ! s _ _ — _ 61+00 ss i -� 315. 6 +00.. {r STt9 • \ 1 ST ST — ST STST ST ST • - r 3-9 ? �3-11 ST ST — ST — ST ST ST ST ST — ST — ST 42ND AVE S. C'z rizrU ST ST S •sr ®sr — 3-12 n -2 ., �# '•-=\ 4; .r-�. - - ""FILL v i :el FILL FlL� FILL FILL TILL o...00.. o. —� �. -------- —f . _�� = — ' w J1117iE9s'A7 INC'-Gt� - - - > r' . >,:,ray_,.4N..rfY"„ ".,..5�"...rt:'.A 3-2 3-3 1I d %AA/ re z uo 1111p > winrnz re 1Y II 15 \ TIMBER POLE WALL RW -3R N5 0�410N0 ° "NoNoab c+ -W- 1O vp>v v. WfZ O10inrnc+ic+f ��ceI.n" '1'n�U�LZII 11 II II N�Uvv D-5ct rn010o 0 orrorrulw cc 1.1J 11 �' ogz II II II OU3LLva:www PROFILE GRADE 58+00 ' Sewer 6" DIA re V" 0V.M n�z ry,UN_ +N,i01001 I._o1O 0-U °d n,� Clio; ��{.L�Q JI.P.IJ.7JCLl. 01 O] () 11 11 11 CA- pVw��www + EXISTING GROUND 18" DIA; L=46' @ 9.59% 18" DIA; L=81' @ 11.34% re 59+00 18" DIA; L=26' @ 14.75% 18" DIA; L=32' @ 12.26% PUBLIC WORKS DEPT. 24" DIA; L=170' © 13.73% 24" DIA; L=58' c 14.68% 60+00 -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by dw KRW checked wq«w Psi 61+00 CH2MH 1 LL® 24" DIA; L=131' @ 1t.55% 62+00 0 z a D W z J X 0 MATCH LINE DR4 42ND 62+30 UTILITY CONSTRUCTION NOTES: REMOVE EXISTING MANHOLE OR CATCH BASIN REMOVE EXISTING PIPE TO LIMITS AS SHOWN REMOVE EXISTING STRUCTURE AS SPECIFIED ABANDON EXISTING PIPE AND/OR CATCH BASIN CONNECT EXISTING PIPE TO NEW CATCH BASIN/MANHOLE CONNECT NEW PIPE TO EXISTING CATCH BASIN/MANHOLE CONNECT WALL UNDERDRAIN TO CATCH BASIN O8 ADJUST EXISITING CATCH BASIN OR MANHOLE TO FINISHED GRADE O9 ADJUST EXISTING UTILITIES CASTING TO GRADE 10 ADJUST EXISTING UTILITIES CASTING TO GRADE BY OTHERS 11 RELOCATE TIMBER UTILITIES POLE BY OTHERS 12 RELOCATE FIRE HYDRANT ASSEMBLY 13 INSTALL NEW FIRE HYDRANT ASSEMBLY 74 RELOCATE WATER METER 15 PROTECT UTILITY IN PLACE 16 CONNECT AND EXTEND EXISTING PIPE TO NEW CATCH BASIN/MANHOLE 17 CONNECT/ADJUST EXISTING PIPE TO NEW/PROPOSED DITCH PROPOSED POTHOLE LOCATION, SEE DRD-1 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE AND UTILITY PLAN AND PROFILE 0 20 40 SCALE IN FEET no 4W revisions 25 52 file ce DR -3 scale t"=20' L • rT . L date 8118x2014 1 rl j ern 42ND 63.0.3' 1______42NDj17.5' LT '�12ND-$3+31 23.5' LT R1 I< • \ '‘ • `\ ` r• WALL RW -3i POLE ` • •, POLE AND r - x- -x- x- -xGUI ANCJiO FILL`, to 0 LINE DR3 42 1- 300 290 280 270 w 0 z C.1 260 W z -I 250 ~ 240 230 220 4-10X 42ND 65+45.2' '47.5' LT .. /47/i nv: 7 FILL A.k.a.! L..••••••• SS 9 7 4-5 4-9 4-7 S 9 63+00 1 4'8S� i 64▪ +00 i 65+00 - ST ST - ST - ST ST T 47 ST "amST ST — S 42ND SpEf ST ST( s � 8 • ST T T WALL RW -4R c -71 f_ _NIMIERME•Cii =MOW a© CO X -X- -X- -x-'✓ -x-111 t 1 0 14 ©©m�� � \00 11: 0 I IZ CI Ul 0 CO10 to FILL FILL .:(:7 2 GUY POLE 42ND 63+30.0 24.0' RT WV • WQ PRETREAT UNIT A'•. 0 • • • • • • • u EXISTING GROUND 3 re Z W'43 8t�O W F-IZI Egg ev5 N1- t�r1Rt0 ODrn Lu�o�n+'1N to aD N: N Q., to t0 N L NNNC' N 1 N II (�.<Z� II II II II II s3=ti� uLULui�uru PROFILE GRADE 24" DIA; L=131 © 17.55% 24" DIA; L=185' I@ 11.70% 63+00 I- a F rn rn 7F z-446. >r ......z..... CCG z OI ^1 - e �tIW WaD +NV O1rn01 nn to vd 10 t+1 t-11040 01 NNzCn aswc+Fca�oa-1Z2T•mCYCK ��Z11 II II II II Wt+i1N,-,- 0 0�cew W W W W tp 0=10 r1m a II N N ix 02 II II r34,x-1±+ 24" OIA; L=47' © 1.00% 24" DIA; L=161 @ 8.69% 64+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- bY ma dram declEsd VON ICRW F.4 0. fold ekm 65+00 CH2MHILL. 66+00 MATCH LINE DR5 42ND 66+80 UTILITY CONSTRUCTION NOTES: 01 REMOVE EXISTING MANHOLE OR CATCH BASIN O2 REMOVE EXISTING PIPE TO LIMITS AS SHOWN OREMOVE EXISTING STRUCTURE AS SPECIFIED O4 ABANDON EXISTING PIPE AND/OR CATCH BASIN O CONNECT EXISTING PIPE TO NEW CATCH BASIN/MANHOLE O6 CONNECT NEW PIPE TO EXISTING CATCH BASIN/MANHOLE OCONNECT WALL UNDERDRAIN TO CATCH BASIN ADJUST EXISITING CATCH BASIN OR MANHOLE TO FINISHED GRADE ADJUST EXISTING UTILITIES CASTING TO GRADE ADJUST EXISTING UTILITIES CASTING TO GRADE BY OTHERS RELOCATE TIMBER UTILITIES POLE BY OTHERS RELOCATE FIRE HYDRANT ASSEMBLY INSTALL NEW FIRE HYDRANT ASSEMBLY RELOCATE WATER METER PROTECT UTILITY IN PLACE CONNECT AND EXTEND EXISTING PIPE TO NEW CATCH BASIN/MANHOLE CONNECT/ADJUST EXISTING PIPE TO NEW/PROPOSED DITCH PROPOSED POTHOLE LOCATION, SEE DRD-1 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE AND UTILITY PLAN AND PROFILE • 0 20 40 SCALE IN FEET ,e. • 26 52• , He no DR -4 scale r=20' L r."7" L dale 8/18/2014 42ND 67+20.0 17.5 LT E DR4 Ibr��l1 1Gd�G6.1� O�"V" 4 � ,ef FILL FILL FI 4 0 • 1 1 EXIST G 1 IL M 11 I EK 1 I ULVERT (36" CONC)O2 ' 47� 1 1 � 1 270 260 250 240 i re 230 ,,, x 220 210 200 4 i- %WERT SEE SH V-1 \ • CVr • • + + re z w , N o r o 0 0 NNNODmN w0°esIDN C'J' ' I� ' -a II ..14,44,44,4 CIN— UWWWW oc)LLva 1- 4- PROFILE GRADE EXISTING GROUND 1— 24" DIA; L=81' © 5.00% 24" DIA; L=95' @ 4.00% 67+00 68+00 69+00 70+00 • C UTILITY CONSTRUCTION NOTES: O7 REMOVE EXISTING MANHOLE OR CATCH BASIN O2 REMOVE EXISTING PIPE TO LIMITS AS SHOWN O3 REMOVE EXISTING STRUCTURE AS SPECIFIED 04 ABANDON EXISTING PIPE AND/OR CATCH BASIN OS CONNECT EXISTING PIPE TO NEW CATCH BASIN/MANHOLE O6 CONNECT NEW PIPE TO EXISTING CATCH BASIN/MANHOLE CONNECT WALL UNDERDRAIN TO CATCH BASIN ADJUST EXISITING CATCH BASIN OR MANHOLE TO FINISHED GRADE O9 ADJUST EXISTING UTILITIES CASTING TO GRADE ADJUST EXISTING UTILITIES CASTING TO GRADE BY OTHERS RELOCATE TIMBER UTILITIES POLE BY OTHERS RELOCATE FIRE HYDRANT ASSEMBLY INSTALL NEW FIRE HYDRANT ASSEMBLY RELOCATE WATER METER PROTECT UTILITY IN PLACE CONNECT AND EXTEND EXISTING PIPE TO NEW CATCH BASIN/MANHOLE CONNECT/ADJUST EXISTING PIPE TO NEW/PROPOSED DITCH PROPOSED POTHOLE LOCATION, SEE DRD-1 12 13 14 15 16 17 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III 0 20 40 SCALE IN FEET 1 • r L -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- 27, 52 De no DR -5 scale 1 20' dale a/18/2014 J r� r, j ._J •, J 440 430 420 410 400 390 380 440 430 420 410 400 390 PROFILE GRADE Gas Y2" DIA Tel 'Sewer 8" DIA Waley 8" DIA ' Tel Water 60" DIA 18" DIA; L=28' L 6.60% 18" DIA; L=25' @ 4.00% re re w N tvi m CO '^Z Oi'� 0Sul Lrt 03 ii XZ� II WaCL FINISHED GRADE Tel Water 60" DIA Tel EXISTING GRADE 18" DIA; L=23' -@ 11.88% 400 390 380 370 360 350 8.32% 370 360 350 340 330 re EXISTING GROUND J 0 N u, o N w ccc 111.1110111 flailliggifig°111 K 0 v rnogcl, o at W;c1;g u, u u PROFILE oaceLuW GRADE N 0 12" DIA; L=14' @ 1.00% Gas jr4" DIA Gases-- -Sewer- 12" DIA 8" DIA Tel Tel Water Sewer 8" DIA 12" DIA; L=15' @ 0.50% 6" Dia 12" DIA; L=56' @ 7.54% 12" DIA; L=24' @ 0.50% • N cc WN m ZNOgwfin Who W N060� >} C -FIFO 4tOo H+O ennVR . 1- Ad' in i+mirmm—AP'S. S. ,+, w a m _.. X CI II l'n 11 11 11 WU0I Eozrwww OXlW PROFILE GRADE EXISTING Gas GROUND 4"DIA Water Seewer 12" DIA 8" DIA Tel 8" DIA; L=5' @ 0,50/o ° Gas _. +Water ...,_.... 12" DIA 8" DIA Tel 12" DIA; L=13' @ 0.50% 12" DIA; L=24' @ 0.50% PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by m EWII dram KRW clwcked RAI MI di, b8no CH2MH1LL. 410 400 390 380 370 m o,oz ,own EXISTING W ,m o GROUND 'S' a_ to a al PROFILE z2 " GRADE oUaaW ,Sewer Tel 8" DIA Tel 12" DIA; L=105' @ 6.18% CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE PROFILES 8. revisions 4e L ft . O ' 28 52• , file no DR -6 scale 1"=20' date 8/182014 7 r� r-1 360 350 340 330 320 PROFILE GRADE Jce 1' Tel 'Gas 4" DIA J gmg N o �+r, WngO (. U 0 11 2 �.A .. .. __. .._.. OUvW EXISTING GROUND 10" DIA; L=8' © 0.50% Sewer 18" DIA; L=16' @ 4.00% - STORMWATER POND 12" DIA; L=13' @ 0.50% 12" DIA; L=11' @ 0.50% PROFILE - GRADE J z'- nOU,z N OwOf� srONQ1 Wa � '7 11 NIl N �^ Z, ...lt .. O 03 o Www EXISTING GROUND J J sr sr ON.NN N" ^N, w O N si sf w O N V V all>^ 11 NN ._._ '7 11 NN CC 03 Z�m11 n Ce i1 11_. 00V -01"A004. PROFILE GRADE 1- w Z W H W re Art Z 00 1— Zmuun OUsrwW W W EXISTING GROUND Gas 4" DIA 12" DIA; L=24' © 0.50% 12" DIA; L=7' © 0.36% 0 Gas 0 4" PIA Gas Gas 4" DIA 12" DIA' Tel 1— J — 001(n W O+ 04 �r II •N ZZm II a0 posriTIA Gas 14" DIA 12" DIA; L=69' © 2.38% 7'el H J J �w0WZ W OO M T 0 0 II NN re- . 0 0 Z 1111 postwww 0 Water 12" DIA Sewer 8" DIAL :PROP STORM Tel 12" DIA 12" DIA; L=70' @ 0.50% F Water 12".DIA .. 12" DIA; L=51' @ 0.50% 12" DIA; L=24' © 0.50% BP. 12" DIA; L=38' @ 7.99% Tel 12" DIA; L=68' © 1.03% 12" DIA; L=7' @ 0.36% PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by dale drawn —9 ad* kid Wino, CH2M H I LL® 240 230 220 210 200 190 240 230 220 210 200 190 240 230 220 210 200 190 EXIST SEWER 8" DIA GILLWM, CREEK 30" DIA; L=34' @ 0.50% r . L 6111 C1:1) PROFILE11111. GRADE EXISTING GROUND EXIST SEWER 24" DIA PROP:STORM 12" DIA 24" DIA; LL36' @ 1.60% CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE PROFILES dM revisions L ' 29 52, Ole no DR -7 scale 1'=20' date 8/18/2014 n ..J /� r -, .1 I j J POTHOLE DATA TABLE ID STATION OWNER SIZE PVMT DEPTH SOILCOND. DEPTH TO TOP DEPTH TO BOTTOM PIPE DIRECTION T -50A 50 Century Link 1-4" PVC, 1 -Direct Buried Cable T -50B 50 Century Link 2- 4" PVC T-53 53 Century Link 1-4" PVC, 1 -Direct Buried Cable T -56A 56 Century Link 1-4" PVC, 1 -Direct Buried Cable T -56B 56 Century Link 2-4" PVC . T -56C 56 Century Link 2-4" PVC T-57 57 Century Link 4-4" PVC, 1 -Direct Buried Cable T-59 59 Century Link 4-4" PVC, 1 -Direct Buried Cable T-62 62 Century Link 5-4" PVC, 1 -Direct Buried Cable T-63 63 Century Link 5-4" PVC, 1 -Direct Buried Cable T-68 68 Comcast(?) T-69 69 Comcast(?) T -70A 70 Comcast(?) T -70B 70 Comcast(?) W-508 50 Highline Water 8" DI 56" W -56B 56 Highline Water 8" DI 48" W -50A 50 Highline Water 60" 71" W-51 51 King County WD 125 8" DI 6" HMA SANDY/ROCKY 41" 49" SW & NE W-53 53 King County WD 125 12" DI 6" HMA SAND 38" 50" SE & NW W -56A 56 King County WD 125 12" DI 7" HMA SAND 50" 62" SE & NW W-57 57 King County WD 125 12" DI 8" HMA SAND 44" 56" SE & NW W-59 59 King County WD 125 12" DI 6" HMA SAND 33" 45" SE & NW W-62 62 King County WD 125 12" DI 7" HMA ROCKY 41" 53" SE & NW W-63 63 King County WD 125 12" DI 7" HMA SAND 40" 52" SE & NW W-65 65 King County WD 125 12" DI 6" HMA ROCKY 39" 51" SE & NW W-68 68 King County WD 125 12" DI DID NOT FIND - TOO MUCH DEBRIS W-69 69 King County WD 125 12" DI 8" HMA ROCKY 41" 53" SE & NW W-70 70 King County WD 125 12" DI -THRUST BLOCK 31" W -56C 56 King County WD 125(?) 2" W G -50A 50 PSE 12" STW IP 61" 73" G -SOB 50 PSE 4" STW IP 57" 61" G -53A 53 PSE 4" STW IP 60" 64" G -53B 53 PSE 12" STW IP 49" 61" G -56A 56 PSE 4" STW IP 43" 47" G -56A-1 56 PSE 6" STW (ABAND.) 7" HMA SAND 40" 46" SE & NW G -56B 56 PSE 12" STW IP 59" 71" G -57A 57 PSE 4" STW IP 43" 47" G -57B 57 PSE 12" STW IP 51" 63" G -59A 59 PSE 4" STW IP 36" 40" G -59B 59 PSE 12" STW IP 63" 75" G -63A 63 PSE 4" STW IP 48" 52" G -63B 63 PSE 12" STW IP 48" 60" G-65 65 PSE 12" STW IP 49" 61" G -69A 69 PSE 4" STW IP 39" 43" G -69B 69 PSE 12" STW IP 55" 77" G-70 70 PSE 12" STW IP 60" 72" P-70 70 SCL DUCTBANK AT CULVERT FTB encased Ductbank 22" 71" N & S T/P-65 65 SCL/Century Link/Comcast JT FTB encased Ductbank T/P-69 69 SCL/Century Link/Comcast JT FTB encased Ductbank PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- nY date dnsiOnnd clanked -w fold wno CH2MH I LLo CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE AND UTILITY DETAILS no do revisions • • L rT . 0 L ' 30 52 , fib no DRD-1 stale date 8/20/2014 J r� � J B LJ SPACE CHECK DAMS THE DISTANCE APART WHERE ' i�ti�si�•.... •:�i,f•� •� P • P --ti•� POINTS "A" AND "B" ARE THE SAME ELEVATIONV VN ler 14.11/.....;;;Aterlidi .1.4:1;34,tz • SPILLWAY EXTENDED SECTIONAO SIDE PROTECTION SPILLWAY 11 ".")4"�:i�.r4r a8" ,te.. • iii; VP.6%- ,�• �f,s:f,'.1 OrO .s'rO 8" EFFECTIVE DAM HEIGHT 16" ELEVATION L1 L2 A QUARRY SPALLS ROCK CHECK DAM SCALE: NTS o b°0 0 0 b c, PRo 0`1) o0 ocbQo DITCH INVER 00 0 o'o'o _cboo PLAN A C- PIPE AND DITCH w CONSTRUCTION GEOTEXTILE FOR PERMANENT EROSION CONTROL IF 2 LONGITUDINAL STRIPS OF GEOTEXTILE ARE REQUIRED, SEW SEAM INSTEAD OF OVERLAPPING tJ SECTION A -A SEE TABLE A FOR L2 AND W DIMENSIONS (TYP) B QUARRY SPALLS 12" THICK PAD TYP �i CI fi tint ri'.sr epZ SPILLWAY SECTIONAO TABLE A: DIMENS ONS FOR ROCK PAD PIPE DIAM. L2 W L1 12" 8' 7' 6' L2 FLOWLINE FLOWLINE BEVELED END SECTION SLOPE VARIES (MATCH DITCH SLOPE) O2 ROCK PAD AT OUTFALL SCALE: NTS PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- 0000 0 12" QUARRY SPALLS POND OR DITCH BOTTOM IF 2 LONGITUDINAL STRIPS OF GEOTEXTILE ARE REQUIRED, SEW SEAM INSTEAD OF OVERLAPPING SECTION B -B br dee checked cel er EYE bk no CH2MH I LL® TOP OF WALL 0 fV CONC GUTTER CL. 3000, 4" THICK ROAD EMBANKMENT CONSTRUCTION GEOTEXTILE FOR PERMANANT EROSION CONTROL (HIGH SURVIVABILITY) EXISTING GROUND QUARRY SPALL 12" THICK CONSTRUCTION GEOTEXTILE FOR PERMANANT EROSION CONTROL (HIGH SURVIVABILITY) CONCRETE ROUND WALL DITCH SCALE: NTS DITCH LIMIT (MATCH EXIST) EMBANKMENT QUARRY SPALLS 12" THICK EXISTING GROUND Miy ROCK LINED V -DITCH SCALE: NTS 2' PROPOSED ROAD EMBANKMENT PROPOSED SIDEWALK PROPOSED ROAD EMBANKMENT 2'-0" CONSTRUCTION GEOTEXTILE FOR PERMANANT EROSION CONTROL (HIGH SURVIVABILITY) DRAIN ROCK 8" DIAM REINFORCED PIPE FRENCH DRAIN DITCH SCALE: NTS PROPOSED SIDEWALK CONCRETE GUTTER CL. 3000, 4" THICK EXISTING GROUND OD CONCRETE LINED PARABOLIC DITCH SCALE: NTS CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE AND UTILITY DETAILS a.r revisions 31 52 , Re no DRD-1 scab r . L ' L ' date 8/18/2014 J .J • 7 J PROPOSED STRUCTURAL LATE- .CULVERT "- ;CC 21+97.37` BEGIN NEW CHANNEL.CONSTRUCTION k �, CONCRETE COLLAR \, `\ ,P. -43a34-22. ' 3 '�/.8 a. • y; 4.0 • �.e; f_- ,// BOULDERS (TYP) itC 2 5.00N\ -- EW CHANNEL! CONST EXISTING FALLEN LOG - ..- f BOULDERS (TYP) 220. 210 200 190 NOTES: Ei ST NG ;3fl° CUtVER f �-- ' '_ ----,DAM-- '"_-' !>____ __DO�NOT DISTURB -„_ ,� �` _ _ 't- -EXISTING-CONCRETE -, 0O NOTDISTURB � E tSTING'CONCRETE 1. CONTRACTOR SHALL DESIGN AND CONSTRUCT TEMPORARY CULVERT SHORING SYSTEM PER SPECIFICATION XX.XX. 2. CONTRACTOR SHALL PROTECT EXISTING ROCKERY WALL AND MONITOR MOVEMENT OF THE WALL. EXISTING BOULDERS 3. CONTRACTOR SHALL COORDINATE WITH FRANCHISE UTILITY PROVIDERS FOR THE REMOVAL, PROTECTION, TEMPORARY SUPPORT, RELOCATION AND REINSTALLATION OF UTILITY. 4. COARSE BAND SHALL CONSIST OF TWO MAN STREAM BOULDERS, AND FILL THE VOID SPACE WITH 12" COBBLES. CL 42ND U C7 BEVELED PIPE END WITH CONCRETE SLOPE COLLAR B 4" G r EXISTING ROCKERY WALL, SEE NOTE 2. A / + en N U 0 TEMPORARY CULVERT SHORING, SEE NOTE 1. BEVELED PIPE END WITH CONCRETE SLOPE COLLAR / / w 0� oV Np LL W U 0 10 20 SCALE IN FEET N W Q en 00 N CI <Z2Z i UJ T B CVD -2 COARSE BAND COARSE BAND, SEE NOTE 4 STREAMBED GRAVEL (36" THICK) A CVD -1 COARSE BAND 0 10 20 HORIZONTAL 0 5 VERTICAL 10 22+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- 23+00 deb designed dram E1 KRW checked RJEJ fold akro CH2MH 1 LL® 24+00 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CULVERT PLAN AND PROFILE 220 210 200 190 esb revisions • 32 5• 2, fie no CV -1 scale 1'=10' 0 L date 8118!2014 ivoo lb *yaw* ---6 .., :dp - . � yw F F / / � � 00 AW2 ° 47 / 9 1" � , �� �/' �' , :, 44.01 Tho p° ®��. '�w 14 40 � s lit D� C1s . % t%o ���� oj /Gcu3!,/s 53° 53'16.5"'r �k 4410• if"®t C -- EW CHANNEL! CONST EXISTING FALLEN LOG - ..- f BOULDERS (TYP) 220. 210 200 190 NOTES: Ei ST NG ;3fl° CUtVER f �-- ' '_ ----,DAM-- '"_-' !>____ __DO�NOT DISTURB -„_ ,� �` _ _ 't- -EXISTING-CONCRETE -, 0O NOTDISTURB � E tSTING'CONCRETE 1. CONTRACTOR SHALL DESIGN AND CONSTRUCT TEMPORARY CULVERT SHORING SYSTEM PER SPECIFICATION XX.XX. 2. CONTRACTOR SHALL PROTECT EXISTING ROCKERY WALL AND MONITOR MOVEMENT OF THE WALL. EXISTING BOULDERS 3. CONTRACTOR SHALL COORDINATE WITH FRANCHISE UTILITY PROVIDERS FOR THE REMOVAL, PROTECTION, TEMPORARY SUPPORT, RELOCATION AND REINSTALLATION OF UTILITY. 4. COARSE BAND SHALL CONSIST OF TWO MAN STREAM BOULDERS, AND FILL THE VOID SPACE WITH 12" COBBLES. CL 42ND U C7 BEVELED PIPE END WITH CONCRETE SLOPE COLLAR B 4" G r EXISTING ROCKERY WALL, SEE NOTE 2. A / + en N U 0 TEMPORARY CULVERT SHORING, SEE NOTE 1. BEVELED PIPE END WITH CONCRETE SLOPE COLLAR / / w 0� oV Np LL W U 0 10 20 SCALE IN FEET N W Q en 00 N CI <Z2Z i UJ T B CVD -2 COARSE BAND COARSE BAND, SEE NOTE 4 STREAMBED GRAVEL (36" THICK) A CVD -1 COARSE BAND 0 10 20 HORIZONTAL 0 5 VERTICAL 10 22+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- 23+00 deb designed dram E1 KRW checked RJEJ fold akro CH2MH 1 LL® 24+00 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CULVERT PLAN AND PROFILE 220 210 200 190 esb revisions • 32 5• 2, fie no CV -1 scale 1'=10' 0 L date 8118!2014 GC -LINE PROPOSED GRADE, SEE ROADWAY TYPICAL SECTION I I I I EX 12" G EX 4" G --- EX. 24" SS EXISTING GROUND R=96' L /— EX. JOINT ELECTRICAU COMM. DUCTBANK 16' SPAN CMP (10 GAUGE) STRUCTURAL PLATE ARCHES CULVERT, SEE NOTE 3 5'-0" FLOW LINE 10 1 STREAMBED GRAVEL (36" THICK), SEE NOTE 2 CONCRETE FOOTING (2'X2') GRAVEL BASE (6") i NOTES: GRAVEL BORROW (6") SEE NOTE 1. CULVERT SECTION A V- PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by 1 41e checked mi pro d, 2 foldbkro CH2M H I LL. EX 12" W EXISTING 36" CONC CULVERT 1. GRAVEL BORROW SHALL BE PER WSDOT STD SPECIFICATION 9-03.14(1). 2. STREAMBED GRAVEL SHALL CONSIST A WELL BLENDED MIXTURE OF 12" COBBLE (APPROX 80%), ONE MAN STREAM BOULDER (APPROX 10%), AND TWO MAN STREAM BOULDER (APPROX 10%), PER WSDOT STD SPECIFICATION 9-03.11(2) AND 9-03.11(3). 3. THE STRUCTURAL MULTI -PLATE ARCH CULVERT SHALL BE GALVANIZED STEEL WITH 6" PITCH AND 2" DEPTH CORRIGATION AND IN ACCORDANCE TO STANDARD SPECIFICATION SECTION 9-05.6(8)A. 4. BACKFILL AROUND CULVERT WITH GRAVEL BORROW UP TO 12" OVER THE TOP OF CULVERT. CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CULVERT DETAILS NEW ST Ell revisions 33 52, flan CVD -1 Stale date 8/1812014 n F� 7'-16' VARIES GC -LINE BOULDERS (TYP.) • • • • • PROFILE •• GRADE 1'- I 3 36" THICK STREAMBED GRAVEL SECTION PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- dais chritad inak bId bk no EXISTING GROUND CH2MH I LL® CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CULVERT DETAILS WY revisions 34 52 , file ne CVD -2 scale date 8/20/2014 • W n fl . J rl J ..J fl J y1 .J i • • ..J :J j :.i LJ ` J 49+00 50 0 TE) 00 42ND 50+53.60, 11.00'LT C3 42ND 53+13.77, 11.00' LT Q o C PAVEMENT MARKING NOTES: O1 12" PLASTIC STOP BAR, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -19 O2 DOUBLE SOLID YELLOW, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -13 O3 8" PAINTED WIDE LINE, SEE WSDOT STD PLAN M-20.10-02 04 PLASTIC TURN ARROW, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -18 OS SHARROW SYMBOL, SEE in PVD -1 SIGNING NOTES: (7) REMOVE EXISTING. SIGN INSTALL NEW SIGN RELOCATE SIGN tie 14' 14' 51+00 42ND AVE S. 52+00 53+00 42ND 50+62.94, 11.00' RT 42ND.: 50++35.65, 0.00' LT BEGIN PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by da. Miami EMI drawn MiW checked MGI PM -9 tea, hid M<- RJM CH2M HILL. F 2 42ND 53+25.00 14.00' RT CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN 0 20 40 SCALE IN FEET 9.s revisions ✓ 35 • 52, fde no CH -1 scab 1'=20' date 811912014 1 M In 0 42ND 56+58.42, 85.32' LT END PAVEMENT MARKING NOTES: 0 12" PLASTIC STOP BAR, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -19 O2 DOUBLE SOLID YELLOW, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -13 8" PAINTED WIDE LINE, SEE WSDOT STD PLAN M-20.10-02 O4 PLASTIC TURN ARROW, SEE CITY OF 42ND 56+47.21. 40.43' LT TUKWILA STD PLAN DWG NO. RS -18 BEGIN 42ND 6+58.42, 40.43' LT BEGIN , ENDO 42ND 56+10.19 11.00' LT r 42ND 57+04.73. 11.00' LT MATCH LINE CHI 42 I - IA 54+00 55+00 42ND AVE S. 56+00 57+00 •o 0 '2 14' E:3 1 42ND 5619.5 11.00' RT . _ 42ND 56+29.20, 0.00' LT PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- EI D ® 42ND 56+58.42, 40.4 RT 4 r: by BEGIN ( 1 42ND 56+58.42, 86.25f RT END (' 2 2 dale EWH MG! velem RAO Rd dr awaakno [0 CH2M H 1 LL+ 0 �49 42ND 57+14.07, 11.00' RT 2ND 56+94.50, 0.00' LT 2 BEGIN STREET NAME 42ND 56+69.63, 40.45' LT ENDO 14' z J x 0 O SHARROW SYMBOL, SEE PVD -1 SIGNING NOTES: O REMOVE EXISTING SIGN 2) INSTALL NEW SIGN 0 RELOCATE SIGN CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN 0 20 40 SCALE IN FEET no revisions • , • W • L 36 52 , Ne no CH -2 scale 1•=20' date 9119,2014 fl �J n J J LJ r .1 -J :J 3 J H LINE CH2 42ND 42ND 59+17.21, 11.00' LT 42ND 62+18.05, 11.00' LT 14' 58+00 59+00 14' 42ND AVE S. 60+00 61+00 62+00 1. 1 r ®. 42ND 59+26.55' 11.00' RT • PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- er an EINH drom decked MGJ p.l-7 ern re bald e«ao CH2MH 1 LL® MMI 42ND 62+27.39, 11.00' RT in H LINE CH4 4 PAVEMENT MARKING NOTES: 01 12" PLASTIC STOP BAR, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -19 2O DOUBLE SOLID YELLOW, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -13 8" PAINTED WIDE LINE, SEE WSDOT STD PLAN M-20.10-02 O4 PLASTIC TURN ARROW, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -18 0 SHARROW SYMBOL, SEE PVD -1 SIGNING NOTES: Cr) REMOVE EXISTING SIGN 2� INSTALL NEW SIGN 3 ) RELOCATE SIGN CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN 0 20 40 SCALE IN FEET dab revisions r 37, 52 , file no CH -3 scale 1"=20' date 8/192014 ._J -1 ..t LJ • H LINE CH3 42ND • • • \ • 42ND 65+12.50, 11.00' LT 14' 63+00 14' 64+00 42ND AVE S. 65+00 66+00 -I L • • • • • \ 42ND 65+21.84, 11.00' RT \\ 1 • • 0 z N 14' x 0 14' W z V PAVEMENT MARKING NOTES: O1 12" PLASTIC STOP BAR, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -19 O2 DOUBLE SOLID YELLOW, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -13 O3 8" PAINTED WIDE LINE, SEE WSDOT STD PLAN M-20.10-02 O4 PLASTIC TURN ARROW, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -18 OS SHARROW SYMBOL, SEE ni PVD -1 SIGNING NOTES: REMOVE EXISTING SIGN 2 ) INSTALL NEW SIGN cr) RELOCATE SIGN 0 20 40 SCALE IN FEET PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- w die trawn KRW chocked MGJ p w PAM pia ��- CH2MHILL. CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN daled.revisions ( 38 scale 1-.20'� 52 , Me no 4 date e/lB/19/2014B/19/2014 z J S • • ♦ • 42ND 68+22.97, 11.00' LT 14 67+00 14' r ;.42ND AVE S. l 0 Q 42ND 70+34.56 12.68' LT 42ND 71+20.2 . 16.02' LT 42ND 69+74.68, 0.00' LT 4 BEGIN TAPER —71 68+00 69+00 14' 14' 14 70+00 71100 2ND -68-1-32.11;"`11:00, RT ` " _ ", _ l` - 0 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by dere EWH drwm MGI RJM field nkno l 42ND. -70+29.17 11.00' RT 0 1 42ND 71+28.17, 15.96' RT 1 O i 1 � 1 i 1 ♦' 9 ♦ G, 1 9 1 OF 1 4.,0 1 CH2M H I LL® PAVEMENT MARKING NOTES: • 12" PLASTIC STOP BAR, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -19 O DOUBLE SOLID YELLOW, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -13 O 8" PAINTED WIDE LINE, SEE WSDOT STD PLAN M-20.10-02 • PLASTIC TURN ARROW, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -18 OSHARROW SYMBOL, SEE ni PVD -1 SIGNING NOTES: (T) REMOVE EXISTING SIGN C. 2) INSTALL NEW SIGN O RELOCATE SIGN + z e X 0 w z J 2 V F CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN 0 20 40 SCALE IN FEET d.M revisions 39 52 file no CH -5 scale 1'=20' date 8/19/2014 42ND 71+47.66, 6.00' LT 42ND 71 +80.87, 0;62' LT 42ND 72+19.22 15.60' LT x cu w z J 1- 13'± 6' N \ 0 \ o co t \A 10 \ 42ND 72+25.92, 1.19' LT 42ND 72+51.58, 6.00' LT END L D 73+40 74+00 75+00 6' 13'± 1 'L 42ND 71+47.66, 6.00' RT BEGIN /\ 42ND 72+28.91, 16.11' RT 42ND 72+51.58, 6.00' RT END /\ PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by dels EWH chnw docked MGI pMMq RAI nel find Ok no 42ND AVE S. CH2M H I LL+ PAVEMENT MARKING NOTES: O1 12" PLASTIC STOP BAR, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -19 O2 DOUBLE SOLID YELLOW, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -13 O3 8" PAINTED WIDE LINE, SEE WSDOT STD PLAN M-20.10-02 O4 PLASTIC TURN ARROW, SEE CITY OF TUKWILA STD PLAN DWG NO. RS -18 OS SHARROW SYMBOL, SEE ni PVD -1 SIGNING NOTES: CT) REMOVE EXISTING SIGN CT) INSTALL NEW SIGN Cr") RELOCATE SIGN CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN 0 20 40 SCALE IN FEET an revisions 40 52 Se no CH -6 scale r=20' L ' L date 811912014 n fl i n r �. L J • 1 J n J J LJ • J N d 0 H � N Q W -1 odz vy Z IL- n nc5WI- p J Y EE - GS -/ H +NQgzo om3W -1zzz3 +wwam ClpnmmQ0. 440 430 420 410 400 390 =z 1114 o N _1 z ►- oJYvyp 2:36-1° • W F pQ5AaN 0o O ur ZZHC1 Z IY+wwOzm omm0aaa 290 280 270 260 250 240 EL 268.13 EL 267.46 EL 266.79 WALL RW -3L a6 0 r, EL 266.12 n EL 265.45 EL 264.78 EL 264.11 ..E1-2§1,44 EL 262.77 EL 262.10 EL 261.43 BOTTOM OF WALL FINISHED GRADE AT FACE OF WALL EXISTING GROUND AT 4 -FT OFFSET FROM FACE OF WALL 30+00 264 SF MODULAR BLOCK WALL 60 LF BLACK VINYL COATED CHAIN LINK FENCE, TYPE 4 WALL RW -1 L EXISTING GROUND AT 4 -FT OFFSET FROM FACE OF WALL EL 418.75 1"E"41117D8 EL 417.41 EL 416.74 EL 416.07 EL 415.40 EL 414.73 EL 414.06 EL 413.39 EL 412.72 ...ELA12.a5 EL 411.38 EL 410.71 0a a. O� U W J } z Cr��.z_ pJ S- > u. J UZ �6Q5M er 1E. mzz°z= OCu W WQ BOTTOM OF WALL FINISHED GRADE AT FACE OF WALL EL 410.04 EL 409.37 EL 408.70 EL 408.03 10+00 565 SF MODULAR BLOCK WALL 104 LF BLACK VINYL COATED CHAIN LINK FENCE, TYPE 4 PUBLIC WORKS DEPT. • leoe •+V -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- 11+00 bY data tiesig Caen IOtW chocked IAGJ mi 9 bold Ekro 440 430 420 410 400 290 280 270 260 250 31+00 NOTES: 1. CONTRACTOR SHALL ESTABLISH FINISH GRADE AT FACE OF WALL USING ROADWAY PLAN AND PROFILE DRAWINGS PV -1 TO PV -5 UNLESS OTHERWISE NOTED. 2. EXISTING GROUND ELEVATION SHALL BE DETERMINED BY FIELD SURVEY ALONG THE "FACE OF WALL LINE AND/OR "CONTROL LINE. PERFORM FIELD SURVEY AFTER CLEARING THE WALL LINE. DETERMINE EXISTING GROUND TO THE NEAREST 0.1 -FOOT ACCURACY ALONG THE WALL CONTROL LINE, INCLUDE ALL BREAKS IN GRADE LOCATION. 3. THE ELEVATION AND STATIONS OF STEPPED TRANSITIONS WILL VARY ACCORDING TO THE WALL MANUFACTURER AND DESIGN AND SHALL BE ESTABLISHED BY THE CONTRACTOR FOLLOWING THE WALL DESIGN CRITERIA SHOWN OR INDICATED IN THE SPECIFICATIONS. 390 380 370 360 EL 379.33 WALL RW -2L Oa ^Q -Q 0 0 J u l U u F a Z z min< 1.4.41_0z Ntzo7 Mz EL 378.66 J dp -. J O 1- N v -1g ri 0 m +,Oi J N Q _ _ J^3 gC 37�'§§ '� +>z o -'C OZX � + II itInnIWU WmW - EL 377.32 EXISTING GROUND AT EL 375.31 4 -FT OFFSET FROM EL 375.98 FACE OF WALL EL 376.65 FINISHED GRADE AT FACE OF WALL BOTTOM OF WALL 410 400 390 380 370 360 390 350 350 20+00 20+60 183 SF MODULAR BLOCK WALL 39 LF BLACK VINYL COATED CHAIN LINK FENCE, TYPE 4 11+20 CH2MH1LL. CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III RETAINING WALL ELEVATIONS �41C 52, Bern RT -1 scale date 81192011 1 z 0 o��Yz�yo ca. ui O a g V y O N O mozzW W OFU QzQ W W J ten mmt)aaa 310 300 290 280 270 260 250 WALL RW -3R EL 288.92 EL 288.25 EL 287.58 EL 286.91 EL 286.24 EL 285.57 0 O 0 EL 290.93 EL 290.26 BOTTOM OF WALL �Q� 250 240 230 220 210 200 190 p I. m EL 220 88 EL 221.55 - EL 272.27 WALL RW -4L EL 226.24 EL 225.57 EL 222.89 EL 224.90 EL 224.23 EL 223.56 BOTTOM OF WALL EXISTING GROUND AT 4 -FT OFFSET FROM FACE OF WALL FINISHED GRADE AT FACE OF WALL 40+00 328 SF MODULAR BLOCK WALL 310 300 EL 284.90 FINISHED GRADE AT FACE OF WALL EXISTING GROUND AT 4 -FT OFFSET FROM FACE OF WALL 300+00 292 SF MODULAR BLOCK WALL 60 LF BLACK VINYL COATED CHAIN LINK FENCE, TYPE 4 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- 290 280 270 260 250 301+00 bY dye Oren KRW alerted MGI Vol aq t,dl, PJM 240 230 220 210 200 190 40+60 NOTES: WALL RW -4R rgYzJZ o >J o OHIzJ �rerc z.0U)0 ��35?v cOJVle =WHr o o+wZY2W ON 50a0o ONJ()Vd J vp;mo�NJ goa5o �wzz0V3z yq,8ww ui 1- lA f 3,�t,wwowwg 3*ZZOw R:wmmUWdd LL w WWULL 300 290 280 270 260 260 250 250 FINISHED GRADE AT FACE OF WALL EL 269.34 tL 268.67 EL 268.00 EL 267.33 EL 266.66 - EL 265.99 EL 265. 300 290 280 270 32 EXISTING GROUND AT 4 -FT OFFSET FROM FACE OF WALL BOTTOM OF WALL 240 240 400+00 400+40 93 SF MODULAR BLOCK WALL 30 LF BLACK VINYL COATED CHAIN LINK FENCE, TYPE 4 1. CONTRACTOR SHALL ESTABLISH FINISH GRADE AT FACE OF WALL USING ROADWAY PLAN AND PROFILE DRAWINGS PV -1 TO PV -5 UNLESS OTHERWISE NOTED. 2. EXISTING GROUND ELEVATION SHALL BE DETERMINED BY FIELD SURVEY ALONG THE "FACE OF WALL LINE AND/OR "CONTROL LINE". PERFORM FIELD SURVEY AFTER CLEARING THE WALL LINE. DETERMINE EXISTING GROUND TO THE- NEAREST 0.1 -FOOT ACCURACY ALONG THE WALL CONTROL LINE, INCLUDE ALL BREAKS IN GRADE LOCATION. 3. THE ELEVATION AND STATIONS OF STEPPED TRANSITIONS WILL VARY ACCORDING TO THE WALL MANUFACTURER AND DESIGN AND SHALL BE ESTABLISHED BY THE CONTRACTOR FOLLOWING THE WALL DESIGN CRITERIA SHOWN OR INDICATED IN THE SPECIFICATIONS. CH2M H 1 LL® CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III RETAINING WALL ELEVATIONS revisions 42 52, Re no RT -2 scale date 8/19/2014 0 51+00 52+00 S.160TH ST 42ND AVE S. 4( 0 0 0 O •0 re 430 420 410 400 390 380 8' TYP a,JY 5Zao,D 0 NagU gg oisMorm ^zz�z +u O WW WWOO W W W inmmULLad EXISTING GROUND AT 4 -FT OFFSET FROM FACE OF WALL TOP OF CAP BEAM WALL RW -1R, SOLDIER PILE WALL APPROXIMATE BMW .1F FASCIA PANEL 0 0 O O W U ~7ZW • LL O YY N jZ O z o00< ZZi usW WU 4 5 6 11 12 T I I 13 14 15 16 17 18 100+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS WATER -SEWER -PARKS -BUILDING - 430 420 410 400 390 380 101+00 101+60 by date deigned EWH KRW checked MGI - tens Rai Pa dI field btno CH2MH I LL® 0 10 20 SCALE IN FEET CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III RETAINING WALL RW -1R PLAN AND PROFILE date revisions 4et Eo W • 43 5• 2, file no RT -3 scale 1•=20' date 811912014 52+00 53+00 42ND AVE S. 0 10 20 SCALE IN FEET r iiiiiii el/ /Z; Aiiiiiiiiin A/iiiiiiii iiioio0t"oioi//nu)/iiiiii//AW iW/// ,(41/ii�iio.5(/.(1 ii/ 8' TYP 4C� WALL RW -2R SOLDIER PILE WALL Z 11 ZJ CV 0C o. se=WFo aNag"acN N p> m Q F y O N,v�ZZHV Z pc30<ZLL '2NWWOWWa. an m07VLLLLd 410 400 390 380 370 360 EXISTING GROUND AT APPROXIMATE 4 -FT OFFSET FROM BOTTOM OF FACE OF WALL FASCIA PANEL OF CAP BEAM w W H W 0 L) ui Oµ ___ZZ o� W >LL +mXYY EO N J U Z NQ gJ mZ cion K an 11J WO 200+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- 201+00 by dwerFed drawn EMI M2W t.dd PMI -a MGI RIM FR a, saki nk no 15 J 4 410 400 390 380 370 360 201+40 CH2M H I LL. CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III RETAINING WALL RW -2R PLAN AND PROFILE no revisions L . W 52, file no RT -4 scab 1'=20' date 6/192014 1 1 r7 )' .j . .l fI rI 1 Lj EXISTING GROUND ELEVATION MODULAR BLOCK CUT WALL NTS FINISH GRADE SEE ALIGNMENT AND PAVING PLANS GRADE AT BASE OF WALL ' 1 PV -1, PV -2, PV -3 CAP BLOCK FACE OF WALL LINE UNIT FILL COATED CHAIN UNK FENCE, TYPE 4 MO (1' Min) WORK LINE AT FACE OF BOTTOM BLOCK, SEE RETAINING WALL PROFILES FOR WALL GEOMETRY D IV* i‘• SECTION BACKFILL FOR STRUCTURAL EARTH WALL EXIST GROUND h GEOGRID REINFORCEMENT AS RECOMMENDED BY MANUFACTURER. MIN REINFORCING LENGTH BEHIND BACK FACE OF ALL SHALL BE .7h OR 6' MIN. 6" DIA PERFORATED CORRUGATED POLYETHYLENE UNDERDRAIN PIPE, SEE NOTE 3 MIN. 6^ CSBC UNDER FOOTING FINISHED GRADE AT TOP OF WALL ELEVATION MODULAR BLOCK FILL WALL NTS EXISTING GROUND � � 1 PV -4, PV -5 (1' Min) O CAP BL Z UNIT FILL COATED CHAIN LINK FENCE, TYPE 4 FINISHED GRADE BACKFILL FOR STRUCTURAL EARTH WALL CEMENT CONCRETE SIDEWALK MUM diMitel.W BLOCK / , gir Iffr 4' h WORK LINE AT FACE OF BOTTOM BLOCK, SEE RETAINING WALL PROFILES FOR WALL GEOMETRY SECTION GEOGRID REINFORCEMENT AS RECOMMENDED BY MANUFACTURER. MIN REINFORCING LENGTH BEHIND BACK FACE OF WALL SHALL BE .7h OR 6' MIN. 6" DIA PERFORATED CORRUGATED POLYETHYLENE UNDERDRAIN PIPE, SEE NOTE 3 MIN. 6" CSBC UNDER FOOTING PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by designd ENRI drew aRW checked VW RV MGI RJM prol tr fold WED, RETAINING WALL TABLE WALL NAME WALL TYPE DETAIL AREA (SF) FENCE (LF) DWG. NO. RW -1L MODULAR BLOCK CUT 1 /RT -5 565 104 PV -1 RW -2L MODULAR BLOCK CUT 1 /RT -5 183 39 PV -2 RW -3L MODULAR BLOCK FILL 2 /RT -5 264 60 PV -4 RW -4L MODULAR BLOCK CUT 1 /RT -5 328 — PV -5 RW -1R CANTILEVER SOLDIER PILE SEE RT -3 1070 147 PV -1 RW -2R CANTILEVER SOLDIER PILE SEE RT -4 750 122 PV -1 RW -3R MODULAR BLOCK CUT 1 /RT -3 292 60 PV -3 RW -4R MODULAR BLOCK FILL 2 /RT -3 93 30 PV -4 RETAINING WALL NOTES: 1. BACKFILL FOR MODULAR BLOCK WALL SHALL BE "GRAVEL BACKFILL FOR WALLS". 2. ALLOW ROOM FOR TOPSOIL ON FINISH GRADE WHERE REQUIRED. 3. UNDERDRAIN PIPE REQUIRED FOR WALLS SHOWN IN RETAINING WALL TABLE. CONNECT UNDERDRAIN PIPES TO STORM SEWER SYSTEM AS SHOWN ON THE DRAINAGE AND UTILITY PLANS. 4. BASE OF MODULAR BLOCK WALL SHALL BE IN DENSE, NON -YIELDING FOUNDATION MATERIALS. EXCAVATE TO REMOVE ANY SOFT OR YIELDING AREAS AS REQUIRED TO REACH FIRM FOUNDATION AS APPROVED BY THE ENGINEER DURING CONSTRUCTION. BACKFILL AND COMPACT TO DENSE NON -YIELDING CONDITION WITH GRAVEL BACKFILL FOR WALLS. 5. BACKFILL REINFORCEMENT REQUIRED WHERE WALL HEIGHT >2.5 X D. CH2MH 1 LL. CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III RETAINING WALL DETAILS ear revisions F rT . 0 L 45 52, Ben RTD -1 scab date 8/19/2014 June 20, 2014 U.S. Army Corps of Engineers Seattle District Headquarters 4735 E. Marginal Way South Seattle, WA. 98134 Subject: Section 7 ESA Consultation; No -Effect Letter for the Proposed 40th - 42nd Avenue South - Phase III and Gilliam Creek Culvert Replacement The City of Tukwila is proposing improvements along 42nd Avenue South in the City of Tukwila (the City) between Southcenter Boulevard and South 160th Street. The roadway is a north -south arterial roadway in Tukwila located between Highway 99 to the west and Interstate 5 to the east. The proposed project includes street improvements, sidewalks and bicycle facilities, drainage facilities, and relocation of utilities. In addition, the proposed project would also replace an existing culvert crossing of Gilliam Creek that runs under 42nd Avenue S. about 300 feet north of the centerline of the underpass of the road with State Route (SR) 518. We have prepared this assessment on behalf of the U.S. Army Corp of Engineers (ACOE) to address any potential effects the proposed project may have on species protected by the Endangered Species Act (ESA) under the jurisdiction of the National Marine Fisheries (NMFS) and the U.S. Fish and Wildlife Service (USFWS), as well as a any Essential Fish Habitat (EFH) covered under that Magnuson -Stevens Fishery Conservation and Management Act (MSA). The project will require the ACOE to issue a Section 404 Permit that will allow the City to perform in -water work to replace the Gilliam Creek culvert. The following searches were made on May 28th, 2014 for each of the respective resource agency's websites to obtain a list of protected species: • A listing of protected species under the jurisdiction of National Marine Fisheries Service (NMFS) was obtained from the West Coast Region of NMFS (Attachment A) • A listing of protected species under the jurisdiction of the U.S. Fish and Wildlife Service (USFWS) in the Project Area was obtained from the USFWS Information, Planning, and Conservation System (iPAC). (Attachment B) • A search for listed fish species use in Gilliam Creek using the StreamNet database web site. StreamNet is a multi -agency database funded by the Northwest Power and Conservation Council's Fish and Wildlife Program and by the Bonneville Power Administration. Administered by the Pacific States Marine Fisheries Commission. • A search of the Washington Department of Natural Resource (WDNR) Natural Heritage database was made for additional information on the potential occurrence of listed plant species in King County. Page 2 June 30, 2014 A review of these sources indicates that there are no listed species or designated critical habitat in the action area of the proposed project. This absence of listed species is either due to a lack of any suitable habitat (in type or extent) and that there are no documented occurrences for any of the potential wildlife and plant species found in our resource review. Regarding listed fish species, there are numerous known fish passage blockages (partial and full barriers) downstream of the Gilliam Creek culvert crossing that would prevent any listed fish originating in the Green River (the water body Gilliam Creek eventually terminates in) from reaching the project area. The first full passage barrier upstream from the confluence with the Green River is located on the east side of Interstate 5 about 2,500 feet upstream from the confluence (City of Tukwila Fish Passage Barrier Inventory; Technical Memorandum prepared for the City's Surface Water Management Division by CH2M HILL, November 2011). There are three other full fish passage barriers besides this one downstream of the Gilliam Creek 42nd Avenue S. culvert. However, because the proposed project does have the potential to impact water quality in Gilliam Creek, which would eventually discharge into the Green River, this No Effect Letter presents an evaluation of this potential impact to the listed fish in the Green River (even though they do not occur in vicinity of the project) to demonstrate that the proposed project would have no effect on the water quality in Gilliam Creek or downstream in the Green River. The three listed fish species that use the Green River at the confluence of the Green River and Gilliam Creek are: Chinook salmon (Oncorhynchus tshawytscha), steelhead trout (0. mykiss), and bull trout (Salvelinus confluentus). The NMFS listed the Evolutionary Significant Unit (ESU) of Puget Sound (PS) Chinook salmon as threatened under the ESA on March 24, 1999 (50 CFR 223 and 224) and listed the PS steelhead Distinct Population Segment (DPS) as threatened on June 11, 2007 (72 FR 26722). Critical Habitat for PS Chinook salmon was listed on September 2, 2005 (70 FR 52360); critical habitat has not been designated for steelhead. The USFW listed the PS bull trout DPS as threatened on November 1, 1999 (64 FR 58910) and designated critical habitat for bull trout on October 6, 2004 (69 FR 59996). In addition to the listed fish species in the Green River, there is also Pacific Salmon Fishery Essential Fish Habitat (EFH), a required assessment under the MSA as stated previously. Proposed Project The proposed project will improve the roadway including the addition of sidewalks and bicycle facilities, replacing the curb and gutter system, adding new drainage facilities to convey stormwater and the relocation of utilities. The improvements provide bike lanes and sidewalks along the entire project corridor. In addition, the proposed project removes an existing undersized culvert located under 42nd Avenue S. north of State Route 518 and replaces it with one that meets the fish passage requirements of the Washington Department of Fish and Wildlife (WDFW). Page 3 June 30, 2014 Specifically, the project will provide improvements along 42nd Avenue South from Southcenter Boulevard to S. 160th Street that include asphalt overlay and replacement. The northbound lane of 42nd Avenue S will have a 14 -foot wide shared lane for vehicles and bicycles, and the southbound lane will have an 11 -foot wide traffic lane and a 5 -foot wide bicycle lane. Both sides of the road will have new curbs and gutters, 4 -foot wide amenity zones and sidewalks with a minimum width of 5 feet. The side streets will be improved to provide a transition into 42nd Avenue South. A new storm drain collection, conveyance, treatment and flow control system will be constructed and would include a new stormwater outfall to Gilliam Creek. Existing roadside ditches on both sides of 42nd Avenue S would be filled and existing stormwater runoff would be piped; the existing stormwater flow patterns will not be changed. The culvert to be replaced will be designed to meet fish passage criteria as determined by WDFW fish passage guidelines and design consideration made in the field by Larry Fisher (WDFW biologist) and fish biologists from CH2M HILL. A site visit was made by Mr. Fisher and Randy Whitman of CH2M HILL in August 2013 to evaluate the site conditions and develop aspects of the culvert that were passed on to the design team to ensure that the culvert would be fish -passable. Even though there are numerous fish passage barriers downstream, the City will be replacing the culvert to make it usable by fish so if downstream passage issues are addressed at some point in the future, the project culvert would be functional for salmon and trout use. Environmental Baseline and Action Area As this No Effect letter is only dealing with listed fish species, a description of Gilliam Creek is the only environmental baseline information provided. The upland area is all urban/ suburban development and does not contained usable habitat by listed wildlife or plants as previously noted. Gilliam Creek is located within the Green River drainage basin (Water Resource Inventory Area [WRIA] #09), and its confluence with the Green River occurs at river mile 12.7. The project is located at the south fork of the Upper Gilliam Creek. This reach collects runoff from highly developed urban land use including residential neighborhoods and commercial and industrial development between Tukwila International Boulevard and Port of Seattle. Also collected is runoff from nearby major roadways such as SR518 and SR99 flows to Gilliam Greek. This reach of stream channel is along the north side of SR518 flowing eastward direction. The existing channel bank width is approximately 11 feet wide with steep stream banks on both sides. An old crumbled concrete dam is located 70 feet upstream of the 42nd Avenue S. crossing. This dam is approximately 5 feet tall and stream sediment is filled behind the dam. The existing 42nd Avenue S. crossing concrete culvert is 36 -inches diameter at approximately 5 - percent slope. This culvert is currently not a fish passage culvert and is undersized. Water is backed up at the inlet side even when there is a small storm event. The inlet of the culvert is protected by rockery. An existing rockery wall is at the north side of the culvert inlet, and a Page 4 June 30, 2014 multi -family residential is at the top of this wall. The outlet of the culvert pipe is partially submerged and is also protected by large boulders. No sign of erosion was observed immediately upstream or downstream of the culvert. The action area for the proposed project is 300 feet downstream of the construction area, as this is the linear distance that any increase in sediment and turbidity would be expected to reach background levels. As noted, there are no listed fish in the action area, but water quality is being evaluated as Gilliam Creek drains to the Green River outside the action area where listed fish occur. Potential Project Impacts The only potential impacts to listed fish species from the proposed project is the potential for contaminants to be discharged to Gilliam Creek via stormwater run-off from the impervious surfaces of the project footprint and during construction. There will be no effect to listed species during project construction as the majority of the proposed project will be constructed in an upland area. During construction the contractor will be required to implement Best Management Practices (BMPs), including a Temporary Erosion and Sediment Control Plan (TESC), a Spill Prevention Control and Countermeasures Plan (SPCC), and a Stormwater Pollution and Prevention Plan (SWPPP). All erosion control BMPs will be installed along all ditches and potential drainage areas along the project alignment. After project construction there would still be a discharge of hydrocarbons, zinc and copper to in the stormwater runoff to Gillian Creek as a result of roadway use. However, the proposed project is going reduce the amount of PGS in the action area from 1.81 acres to 1.55 acres, the proposed project would reduce or at least maintain the levels of hydrocarbons, zinc and copper (both dissolved and total) that reach the creek as determined by water quality modeling (Table 1). Specifically the proposed project would reduce dissolved zinc and dissolved copper would remain the same. Dissolved metals are the water quality component effects fish the most, as metals tied up in sediment are not readily available for absorption into the fish through the gills and outer tissues. The "onsite" area depicted in Table 1 is the action area of the proposed project (the alignment corridor). The "off-site" area is the total area that the proposed manhole sediment trap would be "treating" for sediment control. As described above, the sediment trap would be installed not only to treat water from the action area, but also from another stormwater line that drains a much bigger area. However, the reductions sediment, zinc and copper (total and dissolved) included both the on-site and off-site areas. As shown in Table 2, under the Proposed Project Conditions, dissolved pollutants and totals pounds per year in the stormwater system would either be reduced or remain the same when compared to the Existing Project Conditions. Regarding stormwater run-off quantities (flow levels), the proposed project would maintain the current levels of run-off. The proposed project would increase the amount of impervious surfaces by approximately 0.3 acres. The proposed flow control facility will collect an Page 5 June 30, 2014 equivalent amount of runoff from the project site and detain it, which would meet the King County Conservation Flow Control Standards. Table 1 POLLUTANT -GENERATING SURFACES (PGS) IN THE STUDY AREA (acres) Location Existing Project Conditions Proposed Project Conditions Onsite PGS 1.81 1.55 Non -PGS 0.59 0.85 Subtotal 2.40 2.40 Offsite PGS 2.75 2.75 Non -PGS 33.76 33.76 Subtotal 36.51 36.51 Total PGS Area 4.56 4.30 PGS Areas Entering treatment device/facility 0.55 4.30 PGS Areas Receiving Effective Treatment* 0.28 2.15 Total Basin Area (Onsite + Offsite) 38.91 38.91 * Effective treatment is based on the effectiveness of treatment device/facility per King County s guidance Table 2 Stormwater Pollutant Loads for Key Water Quality Parameters (Pounds per Year) Pollutant Existing Project Conditions Proposed Project Conditions TOTAL SUSPENDED SOLIDS 1971 1170 TOTAL ZINC 3.06 2.00 DISSOLVED ZINC 0.89 0.76 TOTAL COPPER 0.50 0.34 DISSOLVED COPPER 0.12 0.12 Page 6 June 30, 2014 Species Effect Determinations The evaluation of the potential effects of the proposed project on water quality to Gilliam Creek has resulted in the ACOE proposing that effect determinations for the project are that the project would be No Effect on PS Chinook salmon, PS steelhead trout, or PS bull trout or any designated critical habitat of these species. This assessment satisfies the ACOEs responsibilities under Section 7(c) of the Endangered Species Act at this time. We are sending you this copy of our assessment for your files. We will continue to remain aware of any change in the status of these species and be prepared to reevaluate species lists every six months and address any potential project impacts if necessary until the project is completed. In compliance with the Magnuson -Stevens Fishery Conservation and Management Act, essential fish habitat (EFH) was assessed for the project. It was determined that the project will have no adverse effect on EFH for Pacific salmon fishery. Please call Mark Mullins, project biologist or Roger Mason, project manager, at 425-453-5000, if you require additional information or if you have any questions about this project. Sincerely, CH2M HILL Mark Mullins Senior Environmental Scientist SEA/Tukwila 42nd Avenue S. NE Letter c: Name's of people Copied Page 7 June 30, 2014 Page 8 June 30, 2014 Attachment A Page 9 June 30, 2014 Page 10 June 30, 2014 Status of ESA Listings & Critical Habitat Designations for West Coast Salmon & Steelhead PUGET SOUND DOMAIN • Puget Sound Chinook Cr) ]FCH 912105] • Hood Canal Summer Chum (T) [FCH 9121051 • Ozette Lake Sockeye (T) [FCH 9121051 • Puget Sound Steelhead (T) [CH under dev.; ANPR 1110/11] WILLAMETTE/LOVER COLUMBIA DOMAIN • Columbia River Chum (T) FCH 9121051 • Lower Columbia River Coho (T) ICH Under dev ; ANPR 1110111] • Lower Columbia River Chinook (T) [FCH 9121051 • Lower Columbia Rider Steelhead (T) FCH 912/051 • Upper Willamette River Chinook (T) IFCH 912105) • Upper Willamette River Steelhead (T) (F CH 9121051 OREGON COAST DOMAIN • Oregon Coast Coho (T) ]FCH 2111108] SOUTHERN OREGON/NORTHERN CALIFORNIA COAST DOMAIN • Southern OregonlNorthern California Coast Coho (1) (0 CH 515199] INTERIOR COLUMBIA DOMAIN • Snake River Sockeye (E) [FCH 12128193] • Snake River Fall Chinook O IF CH 12128193] • Snake River Spring/Summer Chinook (T) IF CH 12128193; 10125/99] • Snake River Steelhead (T) [F01-19/2/05] • Upper Columbia River Spring Chinook (E) IFCH 912105] • Upper Columbia River Steelhead (T) [FCH 912105] • Middle Columbia River Steelhead (T) [FCH 912105] ;Coos Bay,. CENTRAL VALLEY DOMAIN • Sacramento River Winter Chinook (E) IFCH 6116(93] • Central Valley Spring Chinook (T) IFCH 9121051 • Central Valley Steelhead (T) IFCH 912105] NORTH -CENTRAL CALFORNIA COAST DOMAIN • Central California Coast Collo (E) IFCH 5151991 • California Coastal Chinook (T) IFCH 9121051 • Northern California Steelhead (T) IFCH 912105) • Central California Coast Steelhead (T) IFOH 912/051 • ocatello CRTHCAL HABITAT RULES CITED • 6116193 (58 FR 33212) Final CHD for Sacramento River Winter -run Chinook • 12128893 (58 FR 68543) Final CHD for Snake River Chinook and Sockeye • 515199 (64 FR 24049) Final CHD for Central CA Coast and SSONCC Coho • 10/25/99 (64FR57399) Revised CHD for Snake River Spring/Summer Chinook • 912105 (70 FR 52630) Final CHD for 12 ESUs of Salmon and Steelhead • 2111108 (73 FR 7816) Final CHD for Oregon Coast Coho • 1110111 (76 FR 1392) Advance Notice of Proposed Rulemaking; 01-1Ds for Lower Columbia Coho and Puget Sound Steelhead LEGEND (E) Endangered (T) Threatened (FCH) Final Critical Habitat Designated D Domain Overlap SOUTH-CENTRAL/SOUTHERN CALIFORNIA COAST DOMAIN • South -Central California Coast Steelhead Cr) ]FCH 912105] • Southern California Coast Steelhead (E) ]FCH 912105] Z/X !0 es Updated 10-31-12 Page 11 June 30, 2014 Page 12 June 30, 2014 Page 13 June 30, 2014 Attachment B Page 14 June 30, 2014 Page 15 June 30, 2014 1 11 United States Department of the Interior FISH AND WILDLIFE SERVICE Washington Fish and Wildlife Office 510 DESMOND DRIVE SE, SUITE 102 LACEY, WA 98503 PHONE: (360)753-9440 FAX: (360)753-9405 URL: www.fws.gov/wafwo/ Consultation Tracking Number: 01EWFW00-2014-SLI-0441 May 28, 2014 Project Name: 42nd Ave South Culvert Replacement Subject: List of threatened and endangered species that may occur in your proposed project location, and/or may be affected by your proposed project. To Whom It May Concern: The enclosed species list identifies threatened, endangered, and proposed species, designated and proposed critical habitat, and candidate species that may occur within the boundary of your proposed project and/or may be affected by your proposed project. The species list fulfills the requirements of the U.S. Fish and Wildlife Service (Service) under section 7(c) of the Endangered Species Act (Act) of 1973, as amended (16 U.S.C. 1531 et seq.). New information based on updated surveys, changes in the abundance and distribution of species, changed habitat conditions, or other factors could change this list. The species list is currently compiled at the county level. Additional information is available from the Washington Department of Fish and Wildlife, Priority Habitats and Species website: http://wdfw.wa.gov/mapping/phs/ or at our office website: http://www.fws.gov/wafwo/species new.html. Please note that under 50 CFR 402.12(e) of the regulations implementing section 7 of the Act, the accuracy of this species list should be verified after 90 days. This verification can be completed formally or informally as desired. The Service recommends that verification be completed by visiting the ECOS-IPaC website at regular intervals during project planning and implementation for updates to species lists and information. An updated list may be requested through the ECOS-IPaC system by completing the same process used to receive the enclosed list. The purpose of the Act is to provide a means whereby threatened and endangered species and the ecosystems upon which they depend may be conserved. Under sections 7(a)(1) and 7(a)(2) of the Act and its implementing regulations (50 CFR 402 et seq.), Federal agencies are required to utilize their authorities to carry out programs for the conservation of threatened and endangered species and to determine whether projects may affect threatened and endangered species and/or designated critical habitat. A Biological Assessment is required for construction projects (or other undertakings having similar physical impacts) that are major Federal actions significantly affecting the quality of the Page 16 June 30, 2014 human environment as defined in the National Environmental Policy Act (42 U.S.C. 4332(2) (c)). For projects other than major construction activities, the Service suggests that a biological evaluation similar to a Biological Assessment be prepared to determine whether or not the project may affect listed or proposed species and/or designated or proposed critical habitat. Recommended contents of a Biological Assessment are described at 50 CFR 402.12. If a Federal agency determines, based on the Biological Assessment or biological evaluation, that listed species and/or designated critical habitat may be affected by the proposed project, the agency is required to consult with the Service pursuant to 50 CFR 402. In addition. the Service recommends that candidate species, proposed species, and proposed critical habitat be addressed within the consultation. More information on the regulations and procedures for section 7 consultation, including the role of permit or license applicants, can be found in the "Endangered Species Consultation Handbook" at: http://www.fws.gov/endangered/esa- Iibrarvndf/TOC-GLOS.PDF Please be aware that bald and golden eagles are protected under the Bald and Golden Eagle Protection Act (16 U.S.C. 668 et seq.). You may visit our website at littp://www.fws.govipacificleaglelfor information on disturbance or take of the species and information on how to get a permit and what current guidelines and regulations are. Some projects affecting these species may require development of an eagle conservation plan: ( http://www.fws.gov/windenergv/eagle_guidance.html). Additionally, wind energy projects should follow the wind energy guidelines (http://www.fws.gov/windenergy/) for minimizing impacts to migratory birds and bats. Also be aware that all marine mammals are protected under the Marine Mammal Protection Act (MMPA). The MMPA prohibits, with certain exceptions, the "take" of marine mammals in U.S. waters and by U.S. citizens on the high seas. The importation of marine mammals and marine mammal products into the U.S. is also prohibited. More information can be found on the MMPA website: http://www.nmfs.noaa.gov'pr/laws/mmpa/. We appreciate your concern for threatened and endangered species. The Service encourages Federal agencies to include conservation of threatened and endangered species into their project planning to further the purposes of the Act. Please include the Consultation Tracking Number in the header of this letter with any request for consultation or correspondence about your project that you submit to our office. Related website: National Marine Fisheries Service: http:!/www.nwr.noaa.gov/protected species/species list/species lists.html Attachment2 7 1 Page 17 June 30, 2014 United States Department of Interior Fish and Wildlife Service Project name: 42nd Ave South Culvert Replacement Official Species List Provided by: Washington Fish and Wildlife Office 510 DESMOND DRIVE SE, SUITE 102 LACEY, WA 98503 (360) 753-9440 http J/www.fws.gov/wafwo/ Consultation Tracking Number: 01 EWFW00-2014-SLI-0441 Project Type: Transportation Project Description: 42nd Ave South Culvert Replacement - City of Tukwila, WA Project Location Map: Project Coordinates: MULTIPOLYGON (((-122.2820827 47.4657575, -122.2802162 47.4657793, -122.2802537 47.4649198, -122.2821096 47.4649053, -122.2820827 47.4657575))) Project Counties: King, WA http://ecos.fws.gov/ipac, 05/28/2014 03:07 AM Page 18 June 30, 2014 United States Department of Interior Fish and Wildlife Service Project name: 42nd Ave South Culvert Replacement Endangered Species Act Species List There are a total of 11 threatened, endangered, or candidate species on your species list. Species on this list should be considered in an effects analysis for your project and could include species that exist in another geographic area. For example, certain fish may appear on the species list because aproject could affect downstream species. Critical habitats listed on the Has Critical Habitat lines may or may not lie within your project area. See the Critical habitats within your project area section further below for critical habitat that lies within your project. Please contact the designated FWS office if you have questions. Bull Trout (Salvelinus conjluentus) Populate on. U S.A , conterminous, lower 48 states Listing Status: Threatened Has Critical Habitat: Final designated Canada Lynx (Lynx canadenszs) Population. (Contiguous U. S. DPS) Listing Status: Threatened Has Critical Habitat: Final designated, Proposed Golden Paintbrush (Castilleja levisecta) Listing Status: Threatened Gray wolf (Canis lupus) Population U S All of AL, AR, CA, CO, CT, DE, FL, GA, KS, KY, LA, MA, MD, ME, M0, MS, NC, NE, NH, NJ, NV, NY, OK, PA, RI, SC, TN, VA, VT and WV, those portions of AZ, NM, and TX not included in an experimental population, and porti ons of LA, IN, IL, ND, OH, OR, SD, UT, and WA. Mexico. Listing Status: Endangered Grizzly bear (Ursus arctos horribths) Population- lower 48 States, except where listed as an experimental population or delisted Listing Status: Threatened Marbled murrelet (Brachyramphus rnarmoratus) Population CA, OR, WA Listing Status: Threatened Has Critical Habitat: Final designated North American wolverine (Gulo gulo luscus) Listing Status: Proposed Threatened Northem Spotted owl (Stns occidentalis caurina) http://ecos.fws.gov/ipac,05/28/2014 03:07 AM Page 19 June 30, 2014 United States Department of Interior Fish and Wildlife Service Population: Entire Listing Status: Threatened Project name: 42nd Ave South Culvert Replacement Has Critical Habitat: Final designated Oregon Spotted frog (Rana pretiosa) Listing Status: Proposed Threatened Has Critical Habitat: Proposed Whitebark pine (Pinusalbicaulis) Listing Status: Candidate Yellow -Billed Cuckoo (Coccyaus amencanus) Population. Western U.S. DPS Listing Status: Proposed Threatened Critical habitats that lie within your project area There are no critical habitats within your project area http://ecoafws.gov/ipac, 05/28/2014 03:07 AM 0 Aub 01 Z01" J (w1�A P AL MEMORANDUM CH2MHILL® Archaeological Investigation for City of Tukwila 42nd Avenue S Culvert Replacement PREPARED FOR: City of Tukwila COPY TO: Roger Mason, CH2M HILL Eric Haupt, CH2M HILL Rob Rodland, CH2M HILL PREPARED BY: Robin McClintock and Julie Wilt/CH2M HILL DATE: June 12, 2014 Summary This report presents the results of the CH2M HILL archaeological investigation for the City of Tukwila 42nd Avenue S. Culvert Replacement. The culvert replacement requires a U.S. Army Corps of Engineers 404 permit, and therefore subjects the action to Section 106 of the National Historic Preservation Act (NRHP), as amended. The archaeological investigation included background research and a pedestrian reconnaissance. No subsurface investigations were conducted. Background research consisted of a literature and site record review conducted at the online Washington Department of Archaeology and Historic Preservation (DAHP) WISAARD website. The field investigation was conducted by CH2M HILL archaeologists, Robin McClintock, Doug McFarland, M.A., RPA, and Mary Petrich-Guy. This report was prepared by Robin McClintock and Julie Wilt, M.A. No standing structures or archaeological resources were identified during the field reconnaissance. Project Setting The proposed 42nd Avenue S replacement culvert crosses Gilliam Creek, an east -west stream approximately 300 feet south of Southcenter Boulevard, in the City of Tukwila, WA. The archaeological Area of Potential Effect (APE) is located in Township 23 North, Range 4 East, and in the northwest quarter of the southeast quarter of Section 22 (Figures 1-2). The area is substantially developed with residential housing bordering the creek. On each side of the existing culvert, the creek is deeply incised with the creek bed approximately 10 feet below the 42nd Avenue S road bed. The creek exhibits steep slopes topped by fences bordering residential housing. Large basalt boulder armoring is present along these slopes at both ends of the culvert (Photos 1-2). Project Description The project includes the replacement of a non -fish passable, 92 -foot long, 3 -foot diameter concrete culvert with a 146 -foot long, 16 -foot wide by 8 -foot, 4 -inch rise single radius CMP fish passable culvert, which will be constructed as part of the city's 42nd Avenue S road widening project. The proposed culvert location would be shifted approximately 17 feet south of the existing culvert to minimize impacts to the existing rockery wall on the north side of the existing culvert inlet, and the very Targe boulders on the north side of the existing culvert outlet. Approximately 25 feet of upstream channel and 50 feet of downstream channel will be reconstructed because of the shifted position of the new culvert. The area of potential effect is estimated at 50 feet (15.25 meters) by 180 feet (55 meters) (Figure 3). ARCHAEOLOGICAL INVESTIGATION FOR CITY OF TUr...ILA 42ND AVENUE S CULVERT REPLACEMENT Legend ED Area of Potential Effect (APE) USGS 7.5 USGS Quadrangle: Des Moines, Wash 1991 Township 23 N, Range 4E, Section 22 5 125 250 500 MI grAght' ion -Fc=. atiopal 4G ographic Sociat Figure 1 Area of Potential Effect (APE) Tukwila 42 Avenue S. Culvert Replacement King County, Washington 2 • .7 ARCHAEOLOGICAL INVESTIGATION FOR CITPr.r TUKWILA 42ND AVENUE S CULVERT REPLACEMENT aourr23:,4 Nkji tGkoka4, .63Btira,}I 0-Dtiiupring ':�r1.-;Q1r15J I rN, z al#31.7 JS$a 01-r*it u un Legend QArea of Potential Effect (APE) Township 23 N, Range 4E, Section 22 °25 w mo IISS uet■ Extent of Main Map EMSOM ,C c...DEI,FAI NR'OOC Figure 2 Project Location Tukwila42 Avenue S. Culvert Reprlaaement Kang County, Washington Pwa 'i!t:?PP S11 n;•F, 3 ARCHAEOLOGICAL INVESTIGATION FOR CITY OF TU. ,SLA 42ND AVENUE S CULVERT REPLACEMENT Methodology A file search was conducted using the DAHP WISAARD online cultural resources database. The search was to identify previously conducted investigations and previously recorded sites within 0.5 mile of the culvert. The field reconnaissance consisted of a pedestrian examination of both ends of the culvert and upstream and downstream an additional 150 feet to identify any historic or pre -contact artifacts, or features that might indicate the presence of such artifacts. Findings The nearest investigation was the Burien to Renton Rapid -Ride F Line Project (AMEC 2010) conducted along Southcenter Boulevard. That investigation identified no archaeological sites within a mile of the current project. The archaeological site nearest the current project is 45K16, over one (1) mile distant adjacent to the Green River and 1-405. That pre -contact site, recorded in 1963, contained a shell midden, fire cracked rock, and lithic debitage. The pedestrian reconnaissance identified no historic or pre -contact era cultural resources, or indications that any might be present. Vegetation on site was significant, but erosion and animal trails provided some visibility of mineral soil. The steep creek banks do not contain significant natural benches or flat areas that would provide likely locations for pre -contact use. The armored banks indicate mechanical excavation has probably already occurred, widening the creek channel. Most of the excavation required to move the culvert will occur on steep slopes of road fill placed during construction of the original culvert. It is unlikely that buried cultural deposits are present within the area likely to be disturbed by the culvert replacement. The culvert replacement project is deemed to have no effect on historic properties. No further work is recommended. Photo 1: Northeast side of the culvert showing armoring. 4 ARCHAEOLOGICAL INVESTIGATION FOR CIT,.._, TUKWILA 42ND AVENUE S CULVERT REPLACEMENT Photo 2: southeast side of the culvert showing slope and armoring. Cited References AMEC (2010) Burien to Renton RapidRide—F Line Project: Historical, Archaeological, and Cultural Resources Discipline Report. Prepared for King County Metro Transit. 5 DRAFT TECHNICAL MEMORANDUM C3-1212HILL 42nd Avenue South Project, City of Tukwila Stormwater Design Criteria and Stormwater Management Concept PREPARED FOR: Cyndy Knighton, City of Tukwila Ryan Larson, P.E. City of Tukwila COPY TO: Roger Mason, P.E., CH2M HILL PREPARED BY: Raymond Chung, P.E., CH2M HILL Vincent Autier, P.E., CH2M HILL DATE: March 5, 2013 PROJECT NUMBER: 434540 Introduction This technical memorandum presents the stormwater design criteria and stormwater management concepts. The stormwater design criteria section documents the drainage design and erosion/sediment control criteria. The stormwater management concept presents three stormwater management options. Each option was evaluated by assessing maximum footprints, constructability, feasibility, and effectiveness. In addition, opportunities for flow control and treatment of stormwater from existing roadway surfaces were examined. The recommended stormwater management concept, for which a conceptual drainage plan was prepared, is presented in this technical memorandum. This project provides improvements along 42nd Avenue South from South Center Boulevard to South 160th Street. This road section is about 2,300 feet. The side streets will be improved to provide a transition into 42nd Avenue South. Improvements include roadway widening, asphalt overlay and replacement, curb, gutter, bike lane/sharrow, sidewalks, lighting, utility relocations, and a fish passable culvert replacement for Gilliam Creek. The roadway grade south of the SR518 overpass is very steep the a slope up to 14 percent. A sag is located near the Gilliam Creek crossing. These improvements will require drainage facilities, including new storm drains, flow control, and water quality treatment facility. Existing Conditions The Project is located within the Gilliam Creek Basin, part of the Green River Basin. The Project setting is a highly urbanized location consists of single, multi -family residential developments. Stormwater runoff from the roadway drains to the roadway ditches and storm drains. The south end of the Project at South 160th Street is the highest elevation for the Project. The main conveyance system is located on the west side of the road with storm drains and paved ditches. The storm drain is 18 -inch diameter corrugated metal pipes. It conveys the water down to the sag of the road, where Gilliam Creek crosses the 42nd Avenue South, and discharges into the creek through an open rocked channel. The runoff from the east side of the Project drains to storm drains or grass ditches in the east side and crossing to the west side in several locations. Stormwater runoff from up -gradient of the Project drains toward the Project site on both sides of the street, and then combines to the west side paved ditch. The total tributary area for the roadway storm drain south of the Gilliam Creek WBG022513024141SEA / TUKWILA STORMWATER DESIGN MEMORANDUM_20130304 1 COPYRIGHT 2013 BY CH2M HILL, INC. • COMPANY CONFIDENTIAL 42ND AVENUE SOUTH PROJECT, CITY OF TUKWILA STORMWATER DESIGN CRITERIA AND STORMWATER MANAGEMENT CONCEPT crossing, including areas adjacent to the proposed roadway and up -gradient of the Project site, is approximately 38 acres. Approximately 90 percent of the tributary areas are within the City of Tukwila, with the remaining from the City of SeaTac. The north end of the Project starts from South Center Boulevard (approximately 250 feet from Gilliam Creek). Stormwater runoff drains to catch basins and storm drain on the west side and discharges into Gilliam Creek. Stormwater runoff from the east side of the road drains to an existing curb then into a rock -lined channel into Gilliam Creek. There is no existing flow control facility, and no formal water quality treatment best management practices (BM Ps) in the project corridor, except the existing grassy ditches on the east side of the road. The Project site soil is generally roadway fill overlaying compacted glacial till. Existing Utilities The 42nd Avenue corridor is congested with existing underground and overhead utilities. In general, underground utilities include sanitary sewer (8- to 24 -inches), water line (8- and 12 -inch), gas line (4- and 12 -inch), and power and telecommunication duct bank. The sanitary sewer is generally located at the centerline of the road. The pipe size varies from 8 -inch at the south end of the Project to 24 -inches at the roadway sag. The 12 -inch gas line is generally located at the proposed east curb line to a few feet behind the proposed curb. The 4 -inch gas line starts in the west side of the road and shifts to the east side (parallel to the 12 -inch gas line) near the east curb. The 12 -inch water line starts in the west side next to the 4 -inch gas line then shifts further west to near the proposed west curb. The 8 -inch water line starts at the east side of the road then turn east at South 158th Street. The concrete -encased Seattle City Light duct bank (10 conduits) is generally located on the west side of the road. The duct bank is approximately 18 inches wide by 30 inches high. Stormwater Design Criteria Federal Federal stormwater regulations are contained in the Clean Water Act and typically are promulgated through local stormwater requirements. State Since the Project's area of disturbance will exceed 1 acre, the City of Tukwila is required to file a Notice of Intent with the Washington State Department of Ecology (Ecology) for coverage under the National Pollutant Discharge Elimination System (NPDES) program's General Permit for Stormwater Discharges Associated with Construction Activities. These filings would likely require the Project to provide erosion control measures consistent with Ecology's Stormwater Management Manual for Western Washington (2005). The City will be the applicant for all Project permits and CH2M HILL will provide the necessary support documentation. With the new culvert and new storm drain systems, new outfalls will be installed for the new storm drain systems discharging water to the creek. An Hydraulic Permit Approval (HPA) will be required from the Washington Department of Fish and Wildlife (WDFW). In addition, the in -stream work for the culvert replacement will also require the HPA and other approval from the permit agencies. A Joint Aquatic Resource Permit Application (JAPRA) will be prepared and submitted for all water related approval. City Technical requirements for the design of surface water facilities are contained in Chapter 5 of the City of Tukwila's Infrastructure Design and Construction Standards (2010). In addition, surface water WBG022513024141SEA / TUKWILA STORMWATER DESIGN REPORT_20130225 2 COPYRIGHT 2013 BY CH2M HILL, INC. • COMPANY CONFIDENTIAL 42ND AVENUE SOUTH PROJECT, CITY OF TUKWILA STORMWATER DESIGN CRITERIA AND STORMWATER MANAGEMENT CONCEPT management requirements for the design of stormwater facilities are contained in King County's Surface Water Design Manual 2009 (KCSWDM) and the City of Tukwila's addendum. The KCSWDM contains eight core requirements and five special requirements that apply to stormwater design. The following lists each requirement and a discussion of how it will be addressed for this Project. Core Requirement 1: Discharge at Natural Locations The runoff from the Project drains to Gilliam Creek, which is part of the Lower Green River Basin. The Project's stormwater will be discharged near the existing discharge locations described under Core Requirement 4. Core Requirement 2: Offsite Analysis An offsite analysis that assess the potential offsite drainage and water quality impacts associated with the Project and proposes mitigation of those impacts will be performed. The assessment will include a Level 1 (qualitative) downstream analysis, as described in Section 1.2.2.1 of the KCSWDM. Information from others for previous projects in the vicinity will be used, if available and appropriate. Core Requirement 3: Flow Control The Project is categorized as transportation redevelopment project. The proposed improvement will add more than 2,000 square feet of new and replaced impervious surface; therefore, the Project exceeds the basic exemption to the KCSWDM Core Requirement 3. A flow control facility is proposed to meet this core requirement. The KCSWDM (Section 1.2.3) requires flow control for stormwater runoff from the new impervious surfaces and new pervious surfaces that is not fully dispersed. The Project does not add 50 percent or more to the existing impervious surface within the Project limit; therefore, flow control facilities are required to mitigate the impacts of stormwater runoff generated by new impervious surface only. According to the Flow Control Applications Map from the KCSWDM, the Project is within the incorporated area of the City of Tukwila. According to the City of Tukwila construction standards, the Project is located within a "conservation flow control area," which requires the Project to meet the Level 2 flow control standards. The Project's stormwater discharge will match the developed discharge durations to pre -developed durations for the range of pre -developed discharges rates from 50 percent of the 2 -year peak flow up to the full 50 -year peak flow. In addition, the Project will match developed peak discharge rates to pre -developed peak discharge rates for the 2- and 10 -year return periods. The historic site conditions are assumed to be the pre -developed conditions. Ecology has proposed that the existing land cover can be used in basins that have had at least 40 percent total impervious surface area for the 20 years preceding Ecology's adoption of the 2005 Stormwater Management Manual for Western Washington (called the 40/20 criterion). The City of Tukwila conducted GIS analysis to confirm impervious percentages in 1985. The Project is not in a 40/20 criterion area; therefore, the pre - developed conditions for this basin area will be forested conditions. Till soils dominate the Project site. Unless specific geotechnical data indicates otherwise, no infiltration will be assumed in the flow control facilities. Core Requirement 4: Conveyance System The proposed roadway improvement includes concrete curbs and gutters. Stormwater conveyance facilities on the Project will consist primarily of catch basins and storm drains. New and existing storm drains will be analyzed using uniform flow method according to methods in KCSWDM Section 4.2.1.2. Existing Storm Drains WBG022513024141SEA / TUKWILA STORMWATER DESIGN REPORT_20130225 3 COPYRIGHT 2013 BY CH2M HILL, INC. • COMPANY CONFIDENTIAL 42ND AVENUE SOUTH PROJECT, CITY OF TUKWILA STORMWATER DESIGN CRITERIA AND STORMWATER MANAGEMENT CONCEPT As described in KCSWDM Section 1.2.4.2, remaining storm drains will be analyzed for the 10 -year peak design flow and the 100 -year peak design flow (to demonstrate it will not create or aggravate a "severe flooding problem" or "severe erosion problem"). In addition, existing storm drains will be replaced if pipe cover or other known physical conditions are deficient. System -wide pipe inspections will not be conducted. Proposed Storm Drains All new conveyance systems will be designed for a 25 -year storm event. Uniform flow will be used to initially size pipes for capacity. Final pipe sizes will be determined from simple backwater analysis, with the following assumptions: • Pipe material: Smooth wall pipe (concrete, corrugated polyethylene pipe [CPEP], or ductile iron pipe) with manning's n = 0.014 (uniform) and 0.012 (backwater) • Minimum pipe diameter: 12 inches • Minimum cover: 2 feet (from top of pavement to top of pipe); if less cover is needed, use ductile iron pipe class 50 • Minimum velocity: 3 feet per second (fps) • Match crowns at junctions with changes in pipe diameter where possible Typical inlet spacing will be 300 feet for road grade steeper than 3 percent, 200 feet for road grade between 1 and 3 percent, and 150 feet for road grade less than 1 -percent. The inlet capacity may be analyzed using the HEC 22 by the Federal Highway Administration (FHWA) or the Hydraulic Manual by the Washington State Department of Transportation (WSDOT). Spill Control KCSWDM Section 1.2.4.3 requires spill control facilities at the downstream end of each conveyance system that carries stormwater runoff from pollution generating surfaces, such as roads. This is to provide temporary containment of oil and floatables. The spill control option to be used will be a tee section in one of the lowest catch basins or manholes in the system (including the stormwater quality treatment/flow control facility). The location of the spill control device(s) will be determined during final design. Core Requirement 5: Erosion and Sediment Control Appropriate erosion and sediment control (ESC) measures will be incorporated into the Project contract plans (KCSWDM Section 1.2.5 and Appendix D). Primary sediment control measures are expected to be temporary ground covers, catch basin filters, silt fence, rock weirs, and sediment traps at the proposed stormwater facilities. Due to limited right-of-way, flexible compliance in meeting the intent of ESC requirements is allowed for road projects. The Project will follow the requirements as listed in the NPDES General Construction Permit. A stormwater pollution prevention plan (SWPPP) will be prepared by the Contractor following the 12 elements as listed in the KCSWDM, and the SWPPP will be updated as site conditions changes. Core Requirement 6: Maintenance and Operations Since the Project improves a public road, the City of Tukwila will continue maintenance and operational responsibility for the drainage facilities. An operations and maintenance (O&M) manual will not be developed. However, the O&M requirements for the stormwater quality treatment, flow control facilities, and spill control facilities will be from the City of Tukwila. WBG022513024141SEA / TUKWILA STORMWATER DESIGN REPORT_20130225 4 COPYRIGHT 2013 BY CH2M HILL, INC. • COMPANY CONFIDENTIAL 42ND AVENUE SOUTH PROJECT, CITY OF TUKWILA STORMWATER DESIGN CRITERIA AND STORMWATER MANAGEMENT CONCEPT Core Requirement 7: Financial Guarantees and Liabilities Since the Project is a City public works project, this core requirement does not apply. Core Requirement 8: Water Quality Per the KCSWDM, projects adding more than 5,000 square feet of new pollution -generating impervious surfaces (PGIS) will provide water quality treatment. For a roadway project with expected 2,000 or more vehicles of annual daily traffic, enhanced basic treatment is required for the new PGIS and new pollution -generating pervious surfaces (PGPS) that are not fully dispersed. In addition, since the Project's new impervious surface is less than 50 percent of the existing impervious, treatment of replaced PGIS is not required. Proposed Developments The proposed roadway improvements includes vehicular and bicycle usage lanes, planter strip, and sidewalk. The existing ditches are generally located underneath the proposed sidewalk. A new stormwater conveyance system is proposed to convey the stormwater runoff. Approximately 520 feet of grassy ditches will be removed. The storm drain main trunk line is proposed at the west curbside, with laterals crossing the road from the east. The stormwater runoff from each end of the Project will be collected by catch basins and be conveyed near the roadway sag and discharge to the Gilliam Creek. The Project will include a flow control facility and a water quality facility. Stormwater Management Concepts Flow Control The project existing and proposed impervious surface area were calculated and tabulated in Table 1. The Project improvement adds 11,128 square feet of new impervious surface area. A flow control facility is proposed to mitigate the increases of peak flow rates from the new impervious surfaces. An existing regional online detention pond is located downstream from the Project site. However, the facility is at capacity and to minimize the in -stream impacts, an onsite detention facility is proposed. There is very limited right-of-way outside the roadway footprint, thus the detention facility will be located within the roadway footprint. TABLE 1 Existing and Proposed Site Conditions Site Conditions Impervious (sf) Pervious (sf) PGIS (sf) Total (sf) Existing Proposed 86,689 19,506 82,077 106,195 97,817 8,378 74,503 106,195 Changes +11,128 -11,128 -7,574 0 sf = square feet A hydrological model was performed using King County's model King County Runoff Time Series (KCRTS) version 6, to calculate peak flows (Table 2) and to size a detention facility. Two types of detention facilities were evaluated, a precast concrete detention vault, and a corrugated metal pipe (CMP). The total new impervious areas for the Project were calculated to be 0.25 acre. A 10 percent contingency factor was added, thus the input area is 0.28 acre. The contingency factor will be reduced as the Project WBG022513024141SEA / TUKWILA STORMWATER DESIGN REPORT 20130225 5 COPYRIGHT 2013 BY CH2M HILL, INC. • COMPANY CONFIDENTIAL 42ND AVENUE SOUTH PROJECT, CITY OF TUKWILA STORMWATER DESIGN CRITERIA AND STORMWATER MANAGEMENT CONCEPT is further developed. The breakdown of the pre -developed and the developed areas, and the land use conditions are provided as follows: • Pre -developed condition — Till forest: 0.28 acre • Developed condition — Impervious: 0.28 acre The minimum required orifice size of 0.5 inch could not be achieved with 0.28 acre for either detention facility because of the small allowable discharge rate from the pre -developed conditions. An additional area of 0.12 acres of impervious area was routed through the facility to achieve minimally required orifice size. The breakdown of pre -developed and developed areas and the land use for the new runs are as follows: • Pre -developed condition — Till forest: 0.28 acre — Impervious: 0.12 acre • Developed condition — Impervious: 0.40 acre The results of the KCRTS run for the flow control facility are presented in Appendix A. The summary of the results are presented in Table 2. TABLE 2 Stormwater Runoff Peak Flow Rates for Pre -developed and Developed Conditions Recurrence Pre -developed Peak Flows (cfs) Developed Peak Flows (cfs) 2 -year 0.036 0.100 5 -year 0.044 0.118 10 -year 0.044 0.118 25 -year 0.046 0.145 50 -year 0.067 0.175 100 -year 0.077 0.189 Note: The peak flow rates were calculated using KCRTS, with 1 -hour time steps. cfs = cubic feet per second Three options were evaluated using either one of the two facilities sized using KCRTS: • Option 1: Install a detention tank as a 6 -foot diameter, 135 -foot long, CMP pipe ending at station 69+00. The tank is proposed to be installed at the middle of northbound lane (east side of 42nd Avenue South). It will be installed between the existing sewer and 12 -inch gas line. The 4 -inch gas line will be relocated. To minimize the trench width, controlled density fill (CDF) will be used to backfill around the tank. The cover at the lower end of the tank starts at 3 feet and the cover at the upper end is approximately 8 feet. This option was not selected due to the amount of the excavation required to install the detention vault. The estimated construction cost is $153,000. WBG022513024141SEA / TUKWILA STORMWATER DESIGN REPORT_20130225 6 COPYRIGHT 2013 BY CH2M HILL, INC. • COMPANY CONFIDENTIAL 42ND AVENUE SOUTH PROJECT, CITY OF TUKWILA STORMWATER DESIGN CRITERIA AND STORMWATER MANAGEMENT CONCEPT • Option 2: A detention vault will be installed ending at station 69+00 (i.e. near the roadway sag where the road grade is mildly sloped and close to the culvert crossing). The detention vault will be 60 feet long, 10 feet wide, and 7 feet tall (interior) with a live storage of 6 feet. It will be installed on the west side of the road, partially underneath the sidewalk. This option is recommended, because it will require the least excavation. The existing 4- and 12 -inch gas lines will have to be relocated. However, the installation of the new culvert requires temporary disconnection or relocation of the utilities. The detention vault may be installed while the utility services are disrupted during the installation of the culvert. The Drainage and Utilities Plan in Appendix C presents this option. The detention vault will be sized to prevent from potential floatation due to the potential high groundwater level. The detention vault design will follow KCSWDM Section 5.3.3.1. The estimated construction cost is $121,000. • Option 3: A detention tank (CMP) will be installed ending at station 69+00, the same ending station of the detention vault. The detention tank will be 135 feet long, 6 feet diameter and with 5.5 feet of live storage. However, since the length of the CMP tank is relatively long, it would be recommended to install two sections of about 68 feet long, each in parallel to minimize the length of the footprint. To minimize the trench width, CDF will be used to backfill around the tank. This option will also require the relocation of the 4- and 12 -inch gas lines. This is expected to be the least expensive option and is recommended for this project. The estimated construction cost is $107,000. Proposed Water Quality Treatment Facility The Project improvement reduces the PGIS area by 7,574 square feet and new PGPS are fully dispersed. Therefore, this project can be exempt from Core Requirement 8; no water quality treatment facility is required. However, 0.44 acre of roadway pavement drains to the grassy ditches on the east side of the road alignment, which currently provides some level of treatment, will be removed. Two options were considered to replace this water quality treatment: • Option A: Two water quality treatment facilities are proposed to replace the function of the grassy ditches. Two Ecology -approved emergent technology BMPs are proposed to provide pre-treatment for the roadway runoff. The BMP will be a flow-through water quality device designed to remove coarse sediment, debris, and free-floating oil. The following are examples of the Ecology -approved devices: — CDS from Contech — Stormceptor from Imbrium Systems Inc. - Aqua -swirl from AquaShield Two pre-treatment units are proposed, one on the north side of the roadway sag and another on the south side of the roadway sag. The unit on the south side of the culvert replacement will be located just upstream of the detention facility. This unit will capture 0.28 acre of PGIS. The proposed pre-treatment unit will be a 4 -foot diameter CDS model number 2015-4. The second unit will be on the north side of the culvert replacement. This unit will capture 0.24 acre of PGIS. The proposed pre- treatment unit will be another 4 -foot diameter CDS model number 2015-4. The total PGIS area captured for pretreatment is 0.52 acre, which exceeds the existing tributary area to the grassy ditches. In conjunction with the reduction of PGIS for approximately 7,574 square feet, the water quality at the storm drain outfall should improve from the current conditions. This option is recommended because it fulfills the treatment needs and costs less than Option B. The estimated cost is $20,000. WBG022513024141SEA / TUKWILA STORMWATER DESIGN REPORT_20130225 7 COPYRIGHT 2013 BY CH2M HILL, INC. • COMPANY CONFIDENTIAL 42ND AVENUE SOUTH PROJECT, CITY OF TUKWILA STORMWATER DESIGN CRITERIA AND STORMWATER MANAGEMENT CONCEPT • Option B: A single large pre-treatment unit can be installed at the storm drain main trunk line near station 65+40, immediately up -gradient of SR 518 Bridge. Since the main trunk line conveys the Project roadway runoff as well offsite runoff, it is estimated the stormwater runoff from more than 30 acres will be treated by this unit. An 8 -foot diameter would be needed to provide adequate capacity of pre-treatment. The overall cost is higher than Option A. However, it treats a much larger area with a more efficient cost per acre of PGIS than Option A. The estimated cost is $45,000. Proposed Conveyance System The conveyance systems proposed are primarily catch basins and storm drains. The south side system starts at South 160th Street. Two existing storm drains enters the Project site at South 160th Street, an 18 -inch CMP in the west side and an 18 -inch CMP in the east side. New storm drains connect to these two existing system and combine them into a main trunk line on the west. An existing 12 -inch water line is located near the new west curb line north of South 158th Street. In order to avoid the utility conflicts and relocation of the entire 12 -inch water line on the west side, the catch basins are proposed to be installed setback 2 feet from the typical curb line. The curb line at the catch basins will be flared out with a transverse slope of 6 percent, and a slight depression of the catch basin frame and grate. These approaches provide some separation between the storm drain structures and the existing water line. When using larger catch basins such as catch basin type 2, the belly of the structure will be erratic toward the sidewalk. The catch basins on the east side may be concrete inlet and be installed over the existing gas line, or the 4 -inch gas line may be relocated at the structures. The proposed storm drain trunk line starts at an 18 -inch diameter and is likely to be 30 inches near the roadway sag. As discussed previously, the main trunk line will be on the west side of the road. A smaller separate storm drain is proposed at the east side of the road to capture enough area to the detention facility. This new storm drain will be installed along the east curb, which will conflicts with the existing 4 -inch gas line. It is expected the 4 -inch gas line will be relocated. Other Design Considerations Groundwater Based on the geotechnical exploration data provided by the City of Tukwila, it is likely the dense till soil will create a perched layer of groundwater. The CMP tank or concrete vault design needs to consider the potential of the tank floatation because of potential buoyancy from groundwater. Utilities Conflicts and Relocation The 4" gas line will be relocated for 730 LF along the east side of the road, and 110LF of 12" gas line will be relocated along the east side of the road. Potholes will be needed to determine the location and depth of the utilities and to develop solutions for conflicts with the new storm drains and the stormwater facilities. Coordinate with Culvert Replacement The proposed culvert replacement will affect the outfall locations and may cause utilities along 42nd Avenue South to be temporary relocated. WBG022513024141SEA / TUKWILA STORMWATER DESIGN REPORT_20130225 8 COPYRIGHT 2013 BY CH2M HILL, INC. • COMPANY CONFIDENTIAL 42ND AVENUE SOUTH PROJECT, CITY OF TUKWILA STORMWATER DESIGN CRITERIA AND STORMWATER MANAGEMENT CONCEPT References City of Tukwila, Department of Public Works. 2010. Infrastructure Design and Construction Standards. King County, Washington, Department of Natural Resources and Parks. 2009. Surface Water Design Manual 2009. January. U.S. Department of Agriculture, Natural Resources Conservation Service (NRCS). 1973. Soil Survey, King County Area, Washington. Washington State Department of Ecology (Ecology). 2005. Stormwater Management Manual for Western Washington (SMMWW). February. WBG022513024141SEA / TUKWILA STORMWATER DESIGN REPORT_20130225 9 COPYRIGHT 2013 BY CH2M HILL, INC. • COMPANY CONFIDENTIAL Attachment A Flow Control - KCRTS Model City of Tukwila - 42nd Ave S Detention Analysis — Predeveloped Conditions t4oductam at *matt !two Waster 140)0.6 Loco.* :aa -TPC Cosout.o Woo... Tuk_ite*., ea; pa..o.t %solo Fotar 1 96 tats TTpe - arauy Ctwttw 9WrLT Taw Srtr gat.. latla.0 7,... Sorts Flls c +st:,.N.+txroo 4717109 rat .11 Fore. 9.26 sows* 90216..0 Tr 0 Combos ho irt.a 9,1. c vtitssd.+acrta.STl16e1 ret wtrtma 9.12 .n. Was* Tr 0 Total 4. B 16 suras I'W 80.scharge tl OTY COS at 6 w 0s Jao $ to Tor 6 Stocky Ttw Sart. ilio Tui Farkas tat T. stat.. CO.r.ta CTWIATF s — Tar Star POO .t.e. 04 %t dl Tt.o Serle. gtote.t. Lm00t16a 'Set. -Tr C060e6109 Sottas '1601_161.0 1st WI..a..t Seel. Facto. 1 60 P.. Ism 966...6 tssacay Worts Taw *nt hie Tmadamo Tzar %woo Fat. c.'+K_ss4. 2. is+ST02119* a2 1 tys.rvtc.. 0 49 .tree T..1s6g Tr a Tet11 bar ...... 0 49 avow teak Dasmsry.. 9199791.211.9.301 5 to Tear Se4rsoo Taw Soy las it I. Tui,M tsl 6 has Sri. Cooptcr 1K01� te..es6 gator tM 401Ms TWA 11a9.1* 4alms 1tl01a Gr.wd [myoma. H�K4 sad Flo Rreasaacto o'155. 1 1,00t01 a -0e 0130 1 110 OWI 0.111 1 if,St\Oe 000 0131 5 I' 10 0131 0 -ell 1 1‘iNO019-00 0139 0 Si 0200 0 113 t IN1001 19411 0 011 e : 10 0 111.5 0110 0 IVRVII 5.91 0.011 1 2"94 1'101 o -tiff 5 3,35,07 1,12 0011 1 10 10 0'000 0 100 5 rlitos 1t,o0 0 919 5 St oe o"Ota 0 IN 2 0a04,01 3""10 0'25 1 100"00 0.0 0 ECM (Ci2) !:'i9 E1d Pic lig 1'K "5 ' . - - IPr' - - 0i'Fr 0II9SW I31°9 --7�1 }P61 EI^e kw.— --E7rr ETate rl rai " 10^1944 rrr•6n1.1-p0'11. 1?s Piet 1x79.71 1112r+ T2j 11109 EiallarB t0ljlzrl City of Tukwila - 42nd Ave S Detention Analysis — Developed Conditions CIALSTE a tto• Tara 210100 Prookicttoo at Stomata /Lae Serves 10e300t Zooms. est -Tate Ceastoataat Sort. Totabor tat lilestootal Seel. Poet. 1 40 be.to Type Otrebtastd P.1064 11161110 24.0 foititte Fttl• 1o.4** Tuata 50000 Ftle a %5ootto4.akorest,67011611 to( 140 tore. 50•1atte 04 0 TOR•1 kte• I 40 Kreat IF*4 borrows. I*. POI at 60 op 1. 1 16 5,1••• Stair awe Taa• Sot tea 0.4.1* Oea tot * Ttto Sart. roustatee 22115 20.0001 Water the I...tattoo,. 104 SolvItt .„.., .„. „ a -..-. imaIrsto Tools tosoatut Canape. PUSS .40 Plot. Prossatoottstas /zebra ,tapeaDleoliezett agree tok_der tat Freeotoo• Sateleate Itett Stars. 141e teltatle• tel Protect Locsttom Tes-Toc 210••••001et• 4. 891666 *aro. to 2,10 212. [400 pas Melte. Teel, Iatteorel Ceosmae MRS otto Floe roaetaeoataa 20661. nee %PIP 241* tok,proOr• tot I Plow frequency klualysas Tama Semi. a *amok. tat !moot looessao See Ter Freest... it Peeks waved to Ptle TakaPred•• pas • Olow Freepeocy Amain. Ito* 501,04 Vale t01,006 164 Pootoat tooetto. Settatea -,seertml Peak no.• botoe,-, nee State took Tine at Peek - - Peaks - - leak Neu. Preb (US) 16001 201101 1/81 2 7/11.81 711 405 I 100 00 0 910 002 4 1406,02 4500 147 1 ZS 04 0140 ISO 1 12,00442 It 00 lit 1 10 00 0 100 100 4 0,24444 7 00 116 4 S 00 0 004 114 4 111//11401 16 00 144 5 I 00 0 444 104 S 1,10,061600 200 0 2 00 2 0.500 142 2 10,26,06 6 06 017 7 1 70 0 211 189 1 1,06,89 4.00 005 0 1 10 0 001 TukTank.doc 2/26/2013 Retention/Detention Facility Type of Facility: Detention Tank Tank Diameter: 6.00 ft Tank Length: 135.00 ft Effective Storage Depth: 5.50 ft Stage 0 Elevation: 0.00 ft Storage Volume: 3665. cu. ft Riser Head: 6.00 ft Riser Diameter: 18.00 inches Number of orifices: 3 Full Head Pipe Orifice # Height Diameter Discharge Diameter (ft) (in) (CFS) (in) 1 0.00 0.55 0.020 2 3.70 0.70 0.020 4.0 3 5.20 0.70 0.012 4.0 Top Notch Weir: None Outflow Rating Curve: None Stage Elevation Storage Discharge Percolation (ft) (ft) (cu. ft) (ac -ft) (cfs) (cfs) 0.00 0.00 0. 0.000 0.000 0.00 0.01 0.01 0. 0.000 0.001 0.00 0.02 0.02 0. 0.000 0.001 0.00 0.03 0.03 0. 0.000 0.002 0.00 0.04 0.04 0. 0.000 0.002 0.00 0.05 0.05 0. 0.000 0.002 0.00 0.16 0.16 0. 0.000 0.003 0.00 0.28 0.28 0. 0.000 0.004 0.00 0.40 0.40 0. 0.000 0.005 0.00 0.50 0.50 0. 0.000 0.006 0.00 0.62 0.62 57. 0.001 0.006 0.00 0.74 0.74 118. 0.003 0.007 0.00 0.85 0.85 179. 0.004 0.008 0.00 0.97 0.97 248. 0.006 0.008 0.00 1.09 1.09 322. 0.007 0.009 0.00 1.21 1.21 398. 0.009 0.009 0.00 1.32 1.32 471. 0.011 0.009 0.00 1.44 1.44 553. 0.013 0.010 0.00 1.56 1.56 637. 0.015 0.010 0.00 1.68 1.68 723. 0.017 0.011 0.00 1.79 1.79 804. 0.018 0.011 0.00 1.91 1.91 894. 0.021 0.011 0.00 2.03 2.03 985. 0.023 0.012 0.00 2.15 2.15 1077. 0.025 0.012 0.00 2.26 2.26 1163. 0.027 0.012 0.00 2.38 2.38 1258. 0.029 0.013 0.00 2.50 2.50 1354. 0.031 0.013 0.00 2.62 2.62 1450. 0.033 0.013 0.00 2.74 2.74 1546. 0.035 0.014 0.00 2.85 2.85 1635. 0.038 0.014 0.00 2.97 2.97 1732. 0.040 0.014 0.00 3.09 3.09 1830. 0.042 0.014 0.00 3.21 3.21 1927. 0.044 0.015 0.00 3.32 3.32 2015. 0.046 0.015 0.00 3.44 3.44 2112. 0.048 0.015 0.00 3.56 3.56 2208. 0.051 0.015 0.00 3.68 3.68 2303. 0.053 0.016 0.00 3.70 3.70 2318. 0.053 0.016 0.00 3.71 3.71 2326. 0.053 0.016 0.00 3.72 3.72 2334. 0.054 0.017 0.00 3.73 3.73 2342. 0.054 0.017 0.00 3.74 3.74 2350. 0.054 0.019 0.00 3.75 3.75 2358. 0.054 0.019 0.00 3.76 3.76 2366. 0.054 0.019 0.00 3.77 3.77 2373. 0.054 0.019 0.00 3.88 3.88 2459. 0.056 0.022 0.00 4.00 4.00 2551. 0.059 0.024 0.00 4.12 4.12 2642. 0.061 0.025 0.00 4.24 4.24 2732. 0.063 0.027 0.00 4.35 4.35 2812. 0.065 0.028 0.00 4.47 4.47 2898. 0.067 0.029 0.00 4.59 4.59 2981. 0.068 0.030 0.00 4.71 4.71 3063. 0.070 0.031 0.00 4.82 4.82 3135. 0.072 0.032 0.00 4.94 4.94 3210. 0.074 0.033 0.00 5.06 5.06 3283. 0.075 0.034 0.00 5.18 5.18 3352. 0.077 0.035 0.00 5.20 5.20 3363. 0.077 0.035 0.00 5.21 5.21 3368. 0.077 0.035 0.00 5.22 5.22 3374. 0.077 0.036 0.00 5.23 5.23 3379. 0.078 0.037 0.00 5.24 5.24 3384. 0.078 0.038 0.00 5.25 5.25 3390. 0.078 0.038 0.00 5.26 5.26 3395. 0.078 0.039 0.00 5.38 5.38 3457. 0.079 0.042 0.00 5.49 5.49 3509. 0.081 0.044 0.00 5.61 5.61 3560. 0.082 0.046 0.00 5.73 5.73 3604. 0.083 0.048 0.00 5.85 5.85 3640. 0.084 0.050 0.00 5.96 5.96 3662. 0.084 0.052 0.00 6.00 6.00 3665. 0.084 0.052 0.00 6.10 6.10 3665. 0.084 0.515 0.00 6.20 6.20 3665. 0.084 1.360 0.00 6.30 6.30 3665. 0.084 2.460 0.00 6.40 6.40 3665. 0.084 3.750 0.00 6.50 6.50 3665. 0.084 5.220 0.00 6.60 6.60 3665. 0.084 6.650 0.00 6.70 6.70 3665. 0.084 7.180 0.00 6.80 6.80 3665. 0.084 7.670 0.00 6.90 6.90 3665. 0.084 8.140 0.00 7.00 7.00 3665. 0.084 8.570 0.00 7.10 7.10 3665. 0.084 8.990 0.00 7.20 7.30 7.40 7.50 7.60 7.70 7.20 7.30 7.40 7.50 7.60 7.70 Hyd Inflow Outflow Target Calc 1 0.19 0.08 0.18 2 0.10 ******* 0.05 3 0.15 ******* 0.04 4 0.10 ******* 0.03 5 0.12 ******* 0.03 6 0.12 ******* 0.02 7 0.09 ******* 0.01 8 0.10 ******* 0.01 3665. 3665. 3665. 3665. 3665. 3665. Peak Stage 6.03 5.69 5.54 5.03 4.56 3.64 2.60 2.52 Route Time Series through Facility Inflow Time Series File:tuk_dev.tsf Outflow Time Series File:rdout 0.084 9.390 0.084 9.770 0.084 10.140 0.084 10.490 0.084 10.830 0.084 11.170 Elev 6.03 5.69 5.54 5.03 4.56 3.64 2.60 2.52 Inflow/Outflow Analysis Peak Inflow Discharge: 0.189 CFS at Peak Outflow Discharge: 0.178 CFS at Peak Reservoir Stage: 6.03 Ft Peak Reservoir Elev: 6.03 Ft Peak Reservoir Storage: 3665. Cu -Ft 0.084 Ac -Ft Flow Frequency Analysis Time Series File:rdout.tsf Project Location:Sea-Tac ---Annual Flow Rate (CFS) 0.047 0.013 0.030 0.013 0.016 0.034 0.045 0.178 Computed Peaks Peak Flow Rates --- Rank Time of Peak 2 2/09/01 7 12/28/01 5 2/28/03 8 8/26/04 6 1/05/05 4 1/18/06 3 11/24/06 1 1/09/08 19:00 17:00 7:00 6:00 15:00 22:00 7:00 9:00 Storage (Ac -Ft) 0.084 0.082 0.081 0.075 0.068 0.052 0.033 0.031 (Cu -Ft) 3665. 3588. 3531. 3263. 2961. 2272. 1437. 1369. 0.00 0.00 0.00 0.00 0.00 0.00 6:00 on Jan 9 in Year 8 9:00 on Jan 9 in Year 8 Flow Frequency Analysis - - Peaks - - (CFS) 0.178 0.047 0.045 0.034 0.030 0.016 0.013 0.013 0.134 (ft) 6.03 5.69 5.54 5.03 4.56 3.64 2.60 2.52 6.02 Flow Duration from Time Series File:rdout.tsf Cutoff CFS 0.001 48940 0.002 1254 0.003 522 Rank Return Prob Period 1 100.00 0.990 2 25.00 0.960 3 10.00 0.900 4 5.00 0.800 5 3.00 0.667 6 2.00 0.500 7 1.30 0.231 8 1.10 0.091 50.00 0.980 Count Frequency CDF Exceedence Probability % % 0 79.811 79.811 2.045 81.856 0.851 82.707 20.189 18.144 17.293 0.202E+00 0.181E+00 0.173E+00 0.005 335 0.546 83.253 16.747 0.167E+00 0.006 170 0.277 83.531 16.469 0.165E+00 0.007 4250 6.931 90.462 9.538 0.954E-01 0.008 2014 3.284 93.746 6.254 0.625E-01 0.010 1689 2.754 96.500 3.500 0.350E-01 0.011 1083 1.766 98.266 1.734 0.173E-01 0.012 417 0.680 98.947 1.053 0.105E-01 0.014 237 0.386 99.333 0.667 0.667E-02 0.015 158 0.258 99.591 0.409 0.409E-02 0.016 135 0.220 99.811 0.189 0.189E-02 0.018 2 0.003 99.814 0.186 0.186E-02 0.019 3 0.005 99.819 0.181 0.181E-02 0.020 13 0.021 99.840 0.160 0.160E-02 0.022 6 0.010 99.850 0.150 0.150E-02 0.023 11 0.018 99.868 0.132 0.132E-02 0.024 8 0.013 99.881 0.119 0.119E-02 0.025 9 0.015 99.896 0.104 0.104E-02 0.027 6 0.010 99.905 0.095 0.946E-03 0.028 7 0.011 99.917 0.083 0.832E-03 0.029 12 0.020 99.936 0.064 0.636E-03 0.031 9 0.015 99.951 0.049 0.489E-03 0.032 5 0.008 99.959 0.041 0.408E-03 0.033 7 0.011 99.971 0.029 0.294E-03 0.035 5 0.008 99.979 0.021 0.212E-03 0.036 2 0.003 99.982 0.018 0.179E-03 0.037 0 0.000 99.982 0.018 0.179E-03 0.038 0 0.000 99.982 0.018 0.179E-03 0.040 1 0.002 99.984 0.016 0.163E-03 0.041 0 0.000 99.984 0.016 0.163E-03 0.042 3 0.005 99.989 0.011 0.114E-03 0.044 0 0.000 99.989 0.011 0.114E-03 0.045 4 0.007 99.995 0.005 0.489E-04 0.046 2 0.003 99.998 0.002 0.163E-04 Duration Comparison Anaylsis Base File: tukpredev.tsf New File: rdout.tsf Cutoff Units: Discharge in CFS Fraction of Time Check of Tolerance Cutoff Base New %Change Probability Base New %Change 0.018 0.33E-02 0.18E-02 -44.6 0.33E-02 0.018 0.015 -16.3 0.020 0.25E-02 0.16E-02 -33.8 0.25E-02 0.020 0.015 -23.8 0.022 0.19E-02 0.14E-02 -27.7 0.19E-02 0.022 0.016 -28.0 0.024 0.14E-02 0.11E-02 -21.6 0.14E-02 0.024 0.022 -9.4 0.027 0.12E-02 0.95E-03 -19.4 0.12E-02 0.027 0.024 -8.9 0.029 0.96E-03 0.67E-03 -30.5 0.96E-03 0.029 0.026 -9.9 0.031 0.64E-03 0.44E-03 -30.8 0.64E-03 0.031 0.029 -4.6 0.033 0.44E-03 0.31E-03 -29.6 0.44E-03 0.033 0.031 -6.1 0.035 0.34E-03 0.18E-03 -47.6 0.34E-03 0.035 0.033 -6.9 0.037 0.23E-03 0.18E-03 -21.4 0.23E-03 0.037 0.034 -9.6 0.040 0.1E-03 0.16E-03 11.1 0.15E-03 0.040 0.042 6.1 0.042 0.82E-04 0.15E-03 80.0 0.82E-04 0.042 0.044 6.4 0.044 0.16E-04 0.98E-04 500.0 0.16E-04 0.044 0.047 7.7 0.046 0.16E-04 0.16E-04 0.0 0.16E-04 0.046 0.047 2.6 Maximum positive excursion = 0.004 cfs ( 9.9%) occurring at 0.040 cfs on the Base Data:tuk_predev.tsf and at 0.044 cfs on the New Data:rdout.tsf Maximum negative excursion = 0.006 cfs (-28.2%) occurring at 0.022 cfs on the Base Data:tuk_predev.tsf and at 0.016 cfs on the New Data:rdout.tsf Attachment B Offsite Tributary Area Map Legend ® OFFSITE DRAINAGE AREA PROJECT AREA TUKWILA DRAINAGE SYSTEM - Drinage Pipes Culvert N - Ditch ammi=2 Stream - Stream -Ditch Trench Drain 125 250 500 Feet SR 516 Rao9 TTS Ramp* 6th t • 164th St CITY OF TUKWILA 40TH - 42ND AVENUE PHASE III ONSITE AND OFFSITE DRAINAGE CONTRIBUTING AREAS CH2MHILL DRAFT TECHNICAL MEMORANDUM CH2MHILL 42nd Avenue South Project, City of Tukwila Gilliam Creek Culvert Replacement Basis of Design PREPARED FOR: COPY TO: PREPARED BY: DATE: PROJECT NUMBER: Cyndy Knighton, City of Tukwila Larson, Ryan, City of Tukwila Roger Mason, P.E., CH2M HILL Amy Carlson, PE., CH2M HILL Raymond Chung, P.E., CH2M HILL March 5, 2013 434540 Project Overview The 40th to 42nd Avenue South Phase III Project (Project) includes roadway widening, asphalt overlay and replacement, curb, gutter, bike Zane/sharrow, sidewalks, lighting, storm drainage facilities, utility relocations, and analysis of a fish passable culvert crossing for Gilliam Creek. This project provides improvements along 42nd Avenue South from South 154th Street to South 160th Street. The northbound lane of 42nd Avenue South will have a 14 -foot wide shared Zane for vehicles and bicycles, and the southbound lane will have a 12 -foot wide traffic Zane and a 4 -foot wide bicycle lane. Both sides of the road will have new curb and gutter, 4 -foot planter strip, and a minimum 5 -foot wide sidewalk. The side streets will be improved to provide a transition into 42nd Avenue South. The Project also includes the analysis of a fish passable culvert crossing for Gilliam Creek whose limits are assumed to extend approximately 200 feet upstream and downstream of the existing culvert. Existing Site Conditions Gilliam Creek is located within the Green River drainage basin (Water Resource Inventory Area [WRIA] #09), and its confluence with the Green River occurs at river mile 12.7. The Project is located at the south fork of the Upper Gilliam Creek. This reach collects runoff from highly developed urban land use including residential neighborhoods and commercial and industrial development between the Pacific Highway and Port of Seattle. In addition, runoff from nearby major roadways such as State Routes (SR) 518 and 99 flows into Gilliam Creek. This reach of stream channel is along the north side of SR 518 flowing eastward direction. The existing channel bank width is approximately 11 feet wide with steep stream banks on both sides. An old crumbled concrete dam is located 70 feet upstream of the 42nd Avenue South crossing. This dam is approximately 5 feet tall and stream sediment is filled behind the dam. The existing 42nd Avenue South crossing concrete culvert is 36 inches in diameter at approximately 5 percent slope. This culvert is currently not a fish passage culvert and is undersized. Water is backed up at the inlet side even during small storm events. The inlet of the culvert is protected by a rockery. An existing rock wall is at the north side of the culvert inlet, and a multi -family residential is at the top of this wall. The outlet of the culvert WBG022513024141SEA / TUKWILA42ND_CULVERTTM_20130304 1 COPYRIGHT 2013 BY CH2M HILL, INC. • COMPANY CONFIDENTIAL pipe is partially submerged and protected by Targe borders. No site of erosion was observed immediately upstream or downstream of the culvert. Soil The existing culvert is founded on very dense glacial till with firm sandy silt fill overlaying the native glacial till. The roadway fill embankment near the culvert is composed of large riprap/boulders with silt and sand infill. Utilities Many existing underground utilities are along the 42nd Avenue South corridor, including a 24 -inch sanitary sewer at the center of the road, two (4- and 12 -inch) Puget Sound Energy gas lines, a 12 -inch water line, telecommunications conduits, and a Seattle City Light duct bank. Overhead utilities are primarily located in the south side of the SR 518, including power and telecommunications. Permit Requirements The Project involves instream work and a new stormwater outfall that requires a Hydraulic Permit Approval (HAP) from the Washington State Department of Fish and Wildlife (WDFW). The instream work may affect an existing wetland, which will require a Section 404 permit from the U.S. Army Corps of Engineers (USACE). In addition, the impacts to potential jurisdictional ditches along the roadside will need to be reviewed by the USACE. A Joint Aquatic Permit Application (JAPRA) will be submitted. This project needs to apply for the City of Tukwila's grading permit and a National Pollutant Discharge Elimination System (NPDES) general permit. The City of Tukwila will apply for a Notice of Intent (NOT) prior to the start of the construction. Design Criteria The design of culvert is intend to be fish passable. The culvert width is designed to meet WDFW requirements for a stream simulation design. The design of the required crossing width is based on a field measurement of the bankfull width (BFW) of the creek. W = 1.2 * BFW + 2 The culvert will pass the 100 -year design peak flow rate with a maximum headwater of 1.25 H/W ratio. The streambed cobbles sizing follows the unit bed discharge method (WDFW, 2003). This method determines the size of the D84 size rock. Then D100, D50, and D16 size streambed cobbles were determined according to the natural sediment distributions in this guideline. Hydrology and Peak Flow Rate The tributary area to the 42nd Avenue culvert is approximately 635 acres, with 500 acres from the City of SeaTac and the remaining from the City of Tukwila. The basin boundary was determined by reviewing available basin plans, reports, and GIS maps (contours and storm drain systems) from the Cities of Tukwila and SeaTac. The area is part of the Riverton Heights Subbasin (Herra, 2000). The boundary extends north to South 146th Street, west to 26th Avenue South, and south to South 168th Street. This south fork of upper Gilliam Creek has two major tributaries: the southwest tributary and the northwest tributary. Figure 1 in Attachment A shows the basin tributary. The land cover of the tributary was determined using aerial maps from the Cities of Tukwila and SeaTac. The tributary area to the north and south of the Project site is primarily residential areas with single- family houses. Stormwater runoff conveyed by roadway side ditches and storm drains. The tributary west of the Project site primarily consists of the Port of Seattle and SR 518 interchange. Stormwater runoffs are generally conveyed by enclosed storm drains. There is no stream gauge in Gilliam Creek and no flow data is available. The stormwater runoff peak flow rates are calculated using a single storm event model, Santa Barbara Unit Hydrograph (SBUH) methodology. The peak flows for the 2- to the 100 -year periods are listed in Table 1. The annual low flow rate, as listed in Table 1, is based on a water quality report (Herra, 2001). These peak flow rates were estimated based on the land cover, hydrological soil Group C, and time of concentration. A hydraulic model was performed with the existing culvert. It is estimated the roadway will be overtopped from the creek at approximately 300 cubic feet per second (cfs). Because there is no record of overtopping from floodwater, a boundary condition for the upper limit of the peak flow rate was provided. Local attenuation, flow restriction, areas with more permeable soil that expected, or local flow control systems were not included. Therefore, these peak flow rates could be on the higher side of the estimate and should be conservative values for sizing the streambed gravels. The boundary and estimated land cover of tributary area and the hydrological model output using StormShed3G are included in Attachment B. TABLE 1 Gilliam Creek Flow Rates at 42nd Avenue South Flow statistic Discharge (cfs) Average summer low flow' Average annual flow' 2 -year recurrence peak flow2 10 -year recurrence peak flow2 25 -year recurrence peak flow2 100 -year recurrence peak flown 0.5 21 98 187 235 283 Notes: 1. Source: Herra, 2000 2. Calculated using SBUH methodology (Attachment A). Proposed Culvert The existing BFW of the creek downstream of the culvert was measured approximately 11.5 feet downstream of the existing culvert. The proposed culvert bed width would be 16 feet wide, according to the streambed criteria listed previously. Several culvert types and shapes were considered, including the following: • 16 -foot wide rectangular concrete box culvert • 16 -foot, 3 -inch span by 11 -foot rise corrugated metal pipe (CMP) pipe arch culvert • 16 -foot span by 8 -foot, 4 -inch rise single -radius CMP multiple -plate pipe arch bottomless culvert After an initial order of magnitude cost estimate, the 16 -foot span by 8 -foot, 4 -inch rise single radius CMP multi -plate pipe arch bottomless culvert is the least costly option. The design will continue with this option. The proposed culvert location is shifted approximately 17 feet south to minimize the impact to the existing rockery wall on the north side of the existing culvert inlet, and the very large boulders on the north side of the existing culvert outlet. The streambed channel upstream and downstream of the culvert needs to be reconstructed because of the widening of the streambed and shifting location. Approximately 25 feet of the upstream channel and 50 feet of the downstream channel will be reconstructed. The new culvert has a slope of 3.8 percent. The multi -plate culvert is supported by a concrete footing. This concrete footing will be approximate 2 feet wide and 2 feet deep. The size of footing was sized to provide adequate support to the load from the soil on top of the culvert and deep enough to be protected from being undermined by the stream flow. Hydraulic The USACE Hydrologic Engineering Center River Analysis System (HEC -RAS) software was used to create a hydraulic model characterizing existing peak flow attenuation provided by the 42nd Avenue South culvert barrel based on available information. The HEC -RAS model was run assuming steady state inflow conditions (i.e., a single flow value as opposed to a continuous hydrograph) with peak flow rate listed in Table 1. Using the HEC -RAS to model the existing conditions, the water will overtop the existing roadway with the existing 36 -inch diameter concrete culvert at surveyed inverts elevation. Because there was no record of the road being overtopped by the steam, the creek should not have more than 300 cfs of peak flow rate. The peak flow velocity at the outlet of the culvert ranges from 8 to 10 feet per second. In the proposed conditions with the 16 feet wide span culvert, the modeled flow velocity of the stream remains high because of the steepness of the culvert and the high peak flow rate. The water peak flow velocity at the outlet of the culvert ranges from 7 to 9 feet per second during the 2- to 100 -year storm events, which is reduced from the existing conditions. The water depth is less than 2 feet inside the culvert during large storm event. The proposed HEC -RAS model output is included in Attachment B. Streambed Gravel The streambed gravel is sized using the 50- to 100 -year storm event peak flow rates and the proposed culvert width and slope. Then the sizes of the gravel are increased by 15 percent as a safety factor to reduce the streambed movement. The sizes of the gravel are listed in Table 2. Large streambed boulders will be installed in the channel to provide additional stability of the streambed gravel, and to provide shelter for migrating fish from the high flow velocity. A 1 -foot deep low flow channel is included to allow typically annual low flow to pass through. This low TABLE 2 Streambed Gravel Sizes flow channel has a size slope of 5H:1V and slightly meandering within the culvert with the position of Streambed Gravel (Percent Fine) Cobble Size (inches) the large boulders. The streambed gravel will be D100 26" 3 feet thick. Channel bed grade control structures are proposed to help maintain a channel gradient that allows sediment transport comparable to existing conditions. Two new grade control structures are proposed at the following locations: D84 10" D50 4" D16 1.5" • Upstream culvert entrance to maintain gradient and sufficient water depth in low flow conditions to provide upstream fish passage • Downstream end of the new culvert to maintain bed gradient through the culvert, which will help to minimize bed scour that could otherwise threaten the structural integrity of the culvert side wall foundations Other Design Issues Other than the hydrological and hydraulic design and fish pass ability of the culvert, there are several other design considerations and issues during construction. • The proposed bottom of the streambed gravel is approximately 16 feet from the existing roadway surface. The existing roadway width is approximately 40 feet. The deep excavation needed to install the proposed culvert requires a very wide excavation limit that it is impractical to maintain with even one lane of traffic for both traffic directions during construction. It is recommended the 42nd Avenue South be closed during culvert installation. • There are many existing utilities underneath 42nd Avenue South. During culvert installation, a wide hole will be excavated to reach the bottom of the culvert. All of the existing underground utilities will be exposed. The top width of the excavation at the existing top of roadway could be 60 feet or wider. Existing utilities will need to be temporarily supported, temporary bypassed, relocated, and reinstalled when the road is restored. Following are the major existing utilities: o Puget Sound Energy gas line 12" and 4". o Seattle City Light joint power and telecommunication ductbank. o Water line 12". o Valley View Sewer District sanitary line 24". • An existing concrete dam structure is approximately 40 feet upstream of the proposed culvert inlet. This concrete dam structure is approximately 5 feet tall and is in failing conditions. The concrete is cracked with leaking water and blocks of concrete are falling apart. Sediment is filled behind the dam. This dam structure is outside the Project area; however, if this structure fails, sediment will rush down to the new culvert, potentially clog the inlet of the culvert, create flooding upstream of the culvert, and damage the roadway and adjacent properties. • The current 36-inch concrete culvert is undersized and could create water backup at the upstream end of the culvert. It provides some attenuation to the stream flow. With the proposed larger culvert, water will pass through this new culvert as the stream peak flow rate reaches the culvert and the attenuation effect is diminished. The Gilliam Creek downstream of the culvert may see more frequent larger peak flow rates. The City of Tukwila should monitor the stream for any new developments in stream erosion. References Herra 2000, Gilliam Creek Basin - Description of Existing Conditions and Alternatives for Improvement, Herrera Environmental Consultants, Inc, February 2000. WDFW 2003, Design of Road Culverts for Fish Passage, Washington Department of Fish and Wildlife. Attachment A Hydrology / \ l \ City of Tukwila 2/27/2013 42nd Ave S Culvert Replacement Total Tributary to Gilliam Creek at 42nd Ave S. Total Tributary Area (acres) 635.09 City of Tukwila Boundary Impervious (acres) 34.17 Pervious (acres) 105.84 Subtotal (acres) 140.00 City of SeaTac Boundary Impervious Pervious Subtotal (acres) (acres) (acres) 143.26 351.82 495.08 Total Impervious (acres) 177.43 Total Grass (acres) 388.87 Total Pasture (acres) 34.54 Total Forrest (acres) 34.25 42nd_Area_Summary_20130227.xlsx 1 Tukwila 42" Ave Culvert Replacement Gilliam Creek Peak Flow Rate Appended on: Thursday, July 26, 2012 3:38:28 PM Event Precip (in) 2 yr 24 hr 2.00 5 year 2.50 10 year 3.00 25 year 3.50 100 year 4.00 Existing Event Summary Event 2 yr 24 hr 5 year 10 year 25 year 100 year Peak Q (cfs) 98.122 141.2668 187.0573 234.6459 283.4779 Peak T (hrs) 8.1667 8.1667 8.1667 8.1667 Hyd Vol (acft) 56.0098 77.8502 100.736 124.3475 8.1667 148.4837 Area (ac) Method 635.09 SBUH 635.09 SBUH 635.09 SBUH 635.09 SBUH 635.09 SBUH All results based on storm duration of 24.0 hours. This is ok if all precipitations are appropriate for the storm duration. If some design event precipitations are for different duration storms, those results are incorrect Record Id: Existing Design Method Hyd Intv Storm Duration Pervious Area Pervious CN Pervious TC SBUH 10.00 min 24.00 hrs 457.66 ac 84.72 42.2924 min Rainfall type Peaking Factor Abstraction Coeff DCIA DC CN DC TC Pervious CN Calc Description Wood/forest land (Undisturbed/2nd growth) Pasture or range (fair) Open spaces, lawns,parks (>75% grass) TYPE 1 A.RAC 484.00 0.20 177.43 ac 98.00 25.7611 min SubArea Sub cn 34.25 ac 76.00 34.54 ac 79.00 388.87 ac 86.00 .................. Type Sheet ;Shallow ;Int Channel 'Cont Channel ;;Shallow Type Pervious Composited CN (AMC 2) 84.7233 Pervious TC Calc Description ; Length :Slope Coeff Misc TT Short prairie grass and lawns. Short grass, pasture and lawns (n=0.030) Concrete pipe (n=0.012) Meandering stream w/ some pools (n=0.040) Short grass, pasture and lawns (n=0.030) Pervious TC 100.00 ft 2.0% 0.15 1000.00 ft 3300.00 ft 2.9% 0.03 1.5% 0.012 1500.00 ft 3.0% 0.04 520.00 ft 7.1% 0.03 DCI - CN Calc Description Impervious surfaces (pavements, roofs, etc) DC Composited CN (AMC 2) Description Int Channel Concrete pipe (n=0.012) Int Channel 'Concrete pipe (n=0.012) Cont ;Channel DCI - TC Calc Length 2900.00 ft 3300.00 ft Meandering stream w/ some pools 1500.00 (n=0.040) ft Pervious TC Licensed to: CH2M HILL 'Slope 2.0% SubArea 177.43 ac 12.3935 min 19.1464 min [10.5753 min 17.1375 min Sub cn 98.00 98.00 Coeff Misc TT 0.012 ' 8.0483 min 1.5% 0.012 10.5753 min 3.0% 0.04 :7.1375 min 25.7611 min N Feet 0 245 490 980 1,470 1,960 42nd Ave S Subbasin City Boundary Attachment B Proposed HEC -RAS Model Output CO M r CO V N L() r L() N r C+) (D Ir) 0) - 0) CO O r CO 0) - - W ,- E 0 CD Cr N 0 N- 0) (O O N CO C) N h 0) OO O M O) co co I\ N U r r 0 O r r 0 U r .- - cM 0 O r 0 (L.) r r,- N 0 O .- N 0 0 0 N 17 17 -O 7 7 7 2 2 2 IL LL LL L V M M N V N CD (n = V OO n 0) N U) n (D O = N (1) M 7 V CO N V U M 6 (D co CD (D r Lt) i5 N l!) 00 co W (D QI 73 06000 O M V (!7 OV r O (V V C7 r 0) LC) N M Ln (O � (0 Ti O (D N 0 00 O M N.C\I N 3 N co r N N r N N N M r N N r r M N M r N M r r M CL CL CL c0 a 0) co 7 r- 0) Tr V r c0 N CO N co R W (O N 0 L!) M N 0) co L() 0) Cr T- O LC) O co Tr co co to N O cr r M (O n 0) N N 0) N O V N O r O N n Q V — c0 (O V OO LC) O N OV O) 00 r r CO I� N M O) (D (D co (4) M N M V r r 3 N N N— (O r N r M 3 N CO M r OO 0) co N cr O • Q 0 0' 0 IT MU) LL n E 0_10)0000) r 0) M r r M CO CO Ln M Cr 0) M r CO 00 r N O (D CO E Ln r r CV N M V (17 E lf) O M O O) N O C O^ co h N (0 c0 r 6 = r Lf) (0 (1) N CO 0) = OD 00 (O M N N. - U) = O 0) (O M M I\ N U r U r U r r m Y 0 0 g r >,..7., > > O V r N V co n V N 0 7 LA OD n V L!) 0) co O (D L() I` R M CO W (D CL OD 0) O M 0) 0) N CO N O- V O 0) co V V 00 O O- CO 0 M V 0) LC) N CO CO O O O N N W W (O 0 0 O O V (n N W O (O r.-1,- O O V 00 01 N r OO cO V (1) O0). -MN 0000 h. 77 In r N r 0 O r (0 r L• OC) O M O O 0 0 LOt) - N (MO O 0,-0,- 00,-0 ,- ((f o 0 o v, 0 0 0 0 0 • o 0 0 ry o 0 0 0 0 0 0 0,- 0 0000 w= 0 0 0 0 0 0 0 0 6 w o o O o 0 o w 0 0 0 0 0 0 0 0 0 0)N 00 co co N. N N. 0) V (() M V CO W N co N 0) Lf) 0- (D L1) 0) a) NOD V (O CO OD (O I\ CO LC) O M n (17 n V > O O (C) M n TrN M W M (D Ti N 00 M M 0) N I\ Ln 0) V - N O) 0O LA M O L!)0 O O co O O O O 0) W N O O O O O coW O O N O C:3 ^ N N N N N N N N �- o N N N N N N N d^ N N N N N N N N W W F W 0 0 U E 0> 0 c00 3 0 O Q >, c U . 7 0 ccCL 0 0 17 O (n U w f/) 0 U 0 (0 a • O 4 O tp w CD X N NO C CL O 0 a` LL L!) M 0) L!) cr LC) CO CO W CO LC) Crin °11D O) 0 r O n lff r O V ON • I� (D M N O O O 0)) j 00 (_O VTY 0 _ O > N N N N N N > N N N N N V co M 0) N N - V • W. co co N co r LNC) CD V CD N I- - 0 6 O O N N N N N N CD N U S OS > V M (I) 7Y 0) O L!) N L() > (0 OD (O (D 0) V (0 M > 0) TY 0) I. LC) co (+) N (0 to M W W V n O M LD 0 OD OD r r LO (D r OO 0) 0 O M M V (C) 6 4 N N LL n (D M M W 6 0) 0 0) W r (D Ti O) O) Ti M O 0) W OO o- V 0) O 00-0 Do O O O 0) O O 0 0 0 0) O N N O 0 6 N N N N N N N N,— N N N N N N N N,— 6 N N N N N N N ( ) (17 (D N 7 c7 (A 0) to (0 (D N In 01 (() (() (0 N Ln O) W r m O t\ 0- r 0) n (1) W r O O r... h r M n (!) W �- 0) O r 0- O n (C) . J= (D Tr N 0 O O O 00 00 = — V N_ 0 6 O O c0 co L CO Ti N_ N 0 O O co M �") TY TY TY N N N N N N N— CD CA .- N N N N N N N� T U N N N co N N CD N-- c Fc W (0 00000 0000 00000 0000 O > co 0 U River Sta Profile TY TY LL LL LL LL LL LL LL LL LL CL a a a 0 O a a a 0) 0) O (C) NO CO N Tr O O W co 7 N (D O CO (4) V M 01 N N N N N N N N N N N N O 0 0 0 0 0 ate) 0 0 0 > > > > > > > > > > (0 H N River Sta Profile 00000 0)0) 0) 0) 0) t 0 0000 00000 0)0)0)0) 0)0)0)0)0) r r r TO ('4014)10404 F- ▪ (n 013- 7 0 0000 0000 W W W OD N N N N 0 N N N N N N N N N = M M M M CO CO M M M LL LL LL LL LL LL LL LL LL 2 LL LL LL LL LL LL LL LL LL 0 0 0 0 0 0 0 0 0 a 0 0 0 a a 0 0 0 0 0) 0) co In N O M N V 0) 0) O (n N O M N V OD (D 00 (O V N (D O (0 (O OD Tr OD (D V N CO O OD 0 N N N N N N N N N N (.0 N N N N CO CO N N N N 0 0 0 0 0 0 0 0 O 0 00 > > > > > > > > > > > if 0 0 0 0 0 a 0 te) 0 0 0 > > > > > > > > > > 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 O 000000000 0000000000 UUUUUUUUUU O I I I = I I I I I I I I I = 1 1 1 1 1 1 1 17 17 17 17 17 17 17 17 17 17 U 17 17 17 17 17 17 17 17 17 17 U 17 17 17 17 17 17 17 '7 '0 '0 (a c c c c c c c c c c 0) c c= c c c c c cc 0) c c cc cc c c c c CC v v v v v v v v v v ¢ v v v v v v v v v v EC v v v v v v v v v v 0 w 220- 215- 210- 205- 1 GilliamCreek_42ndNew Plan: Plan 09 2/27/2013 GilliamCreek 42ndCulvert 2100 2200 2300 2400 2500 2600 Main Channel Distance (ft) Legend EG PF3 Crit PF 3 WS PF3 Ground Right Levee 2700 2800 220-H GilliamCreek 42ndNew Plan: Plan 09 2/27/2013 GilliamCreek 42nd_Culvert 215- 210- c 0 ca w 205- 200 195 2100 2200 2300 2400 2500 2600 Main Channel Distance (ft) Legend EG PF2 WS PF 2 Crit PF 2 Ground Right Luse 2700 r 2800 220- GilliamCreek 42ndNew Plan: Plan 09 2/27/2013 GilliamCreek 42nd Culvert 215- 210- c 0 ro w 205- 200_ • 195 2100 2200 2300 2400 2500 2600 Main Channel Distance (ft) 2700 Legend EG PF 1 WS PF 1 Crit PF 1 Ground Right Levee 2800 Attachment C Proposed Stream Bed Gravel Sizing City of Tukwila 2/27/2013 42nd Ave S Culvert Replacement Unit Discharge Bed Method D84 = 3.45S 0747 (1.25gc) 0.667 / g 0.5 D84 = intermediate axis of the 84th percentile particles in the sediment distribution S = Energy slope of the proposed channel. qc = the critical unit discharge at which incipient motion of D84 occurs. g = the acceleration due to gravity. Natural Sediment Distribution D84/D100 = 0.4 D84/D50 = 2.5 D84/D16 = 8.0 Calcuated Size based on D84 Increased by 15% D16 Q W qc S g D84 D100 cfs feet cfs/feet ft/ft feet/s^2 feet 2 year 100 16 6.25 0.0376 32.2 0.369 25 year 240 16 15 0.0376 32.2 0.661 100 year 280 16 17.5 0.0376 32.2 0.733 Natural Sediment Distribution D84/D100 = 0.4 D84/D50 = 2.5 D84/D16 = 8.0 Calcuated Size based on D84 Increased by 15% D16 D50 D84 D100 D16 D50 D84 D100 inches 0.55 0.99 1.10 inches 1.77 3.17 3.52 inches 4.43 7.94 8.80 inches 11.07 19.84 21.99 inches 0.64 1.14 1.26 inches 2.04 3.65 4.05 inches 5.09 9.13 10.12 inches 12.73 22.82 25.29 Sources: Design of Road Culverts for Fish Passage, Washington Department of Fish and Wildlife, 2003. streamrock_20130227.xlsx 1 Attachment D Culvert Plan and Profile and Details 4, 220 210 200 190 GC 21+97.39 BEGIN NEW CHANNEL CONSTRUCTION PROPOSED -16+8 4' ALUMINIZED STEEL CULVERT GC 23+22,11= 42ND 69+80.76 41.12.07,1111/111.1r0 AIMITAIrrier ♦ J4' 1-10.--A 42ND / 3 EXISTING }(1" CULVERT. GC 24+05.00 END NEW CHANNEL CONSTRUCTION • G V� iEXISTING FALLEN LOG EXISTING CONCRETE DAM (BROKEN) EXISTING" CONCRETE . CHUTE, (BROKEN) 100 20 SCALE IN FEET A vo- STREAMBEU GRAVEL (36" THICK) 0 10 20 HORIZONTAL 0 5 10 VERTICAL 22+00 PUBLIC WORKS DEPT. -ENGIN EERING-STREETS-WATER-SEWER-PARKS-BUILDING- 23+00 empea CH2MH I LL. 24+00 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CULVERT PLAN AND PROFILE 220 210 200 rwigors 23 ## .w. 1,10' age 3/4/2013 Ct 42ND AVE S. EX 12"G EX 4"G 24" SS JOINT ELECTRICAL/ zz— COMM. DUCTBANK — 16' DIA CMP (10 GAUGE) MULTI -PLATE ARCHES CULVERT STREAMBED GRAVEL (36" THICK) CONCRETE FOOTING CULVERT SECTION v GRAVEL BASE EX 12" W EXISTING 36" CONC CULVERT /— PROPOSED GRADE EXISTING GROUND NEW ST PUBLIC WORKS DEPT. -ENG I N E E R I N G-STR EETS-WATER-SEW ER -PAR KS -B U I L D I N G- CH2MHILL. CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CULVERT DETAILS 24 Me no CVO, eale 14.3 Cif* of .Ju1wiea Department Of Community Development AFFIDAVIT OF DISTRIBUTION I, Carol Lumb , HEREBY DECLARE THAT: Associated File Number (s): N/A Mailing requested by: Carol Lumb Notice of Application X Notice of Decision Notice of Public Hearing Notice of Public Meeting Determination of Non- Significance Mitigated Determination of Non - Significance Determination of Significance & Scoping Notice Short Subdivision Agenda Notice of Application for Shoreline Mgmt Permit Shoreline Mgmt Permit Board of Appeals Agenda Packet Board of Adjustment Agenda Packet Official Notice Notice of Action Other: Was mailed to each of the addresses listed/attached on this 21 day of October , 2014 Project Name: Gilliam Creek Culvert Replacement & 42nd Ave. S. Road Improvements Project Number: E14-0010 Associated File Number (s): N/A Mailing requested by: Carol Lumb Mailer's signature: 6L'U'4 /° / H:\E14-0010 GILLIAM CRK CULVERT REPLACEMENT\AFFIDAVIT OF DISTRIBUTION-NOD.DOC AGENCY LABELS ( ) US Corps of Engineers ( ) Federal HWY Admin ( ) Federal Transit Admin, Region 10 ( ) Dept of Fish & Wildlife Section 1 FEDERAL AGENCIES ( ) US Environmental Protection Agency (E.P.A.) ( )US Dept of HUD ( ) National Marine Fisheries Service Section 2 ( ) Office of Archaeology ( ) Transportation Department (WSDOT NW) ( ) Dept of Natural Resources ( ) Office of the Governor ( ) WA State Community Development ( ) WA Fisheries & Wildlife, MillCreek Office WA Fisheries & Wildlife, Larry Fisher, 1775 12th Ave NW Ste 201, Issaquah WA 98027 WASHINGTON STATE AGENCIES ( ) Dept of Social & Health Services ( ) Dept of Ecology NW Regional Office, Shoreland Div. SHORELINE NOD REQUIRES RETURN RECEIPT NO Dept of Ecology, SEPA **Send Electronically ( ) Office of Attorney General ( ) Office of Hearing Examiner ( ) KC Boundary Review Board ( ) Fire District # 11 ( ) Fire District # 2 ( ) KC Wastewater Treatment Div ( ) KC Dept of Parks & Recreation ( ) KC Assessor's Office Section 3 KING COUNTY AGENCIES ( ) Health Department ( ) Port of Seattle ( ) KC Dev & Enviro Services-SEPA Info Center ( ) KC Metro Transit Div-SEPA Official, Environmental Planning ( ) KC Dept of Natural Resources ( ) KC Dept of Natural Resources, Andy Levesque ( ) KC Public Library System ( ) Foster Library ( ) Renton Library ( ) Kent Library ( ) Seattle Library Section 4 SCHOOLS/LIBRARIES ( ) Westfield Mall Library ( ) Tukwila School District ( ) Highline School District ( ) Seattle School District ( ) Renton School District ( ) QWEST Communications ( ) Seattle City Light ( ) Puget Sound Energy ( ) Highline Water District ( ) Seattle Planning &Dev/Water Dept ( ) Comcast Section 5 UTILITIES ( ) BP Olympic Pipeline ( ) Val-Vue Sewer District ( ) Water District # 20 ( ) Water District # 125 ( ) City of Renton Public Works ( ) Bryn Mawr-Lakeridge Sewer/Water Dist ( ) Seattle Public Utilities ( ) Waste Management ( ) Tukwila City Dep,(rtments Public Wor s ( ) Fire ( ) Police ( ) Finance ( ) Planning ( ) Building ( ) Parks & Rec ( ) Mayor ( ) City Clerk Section 6 CITY AGENCIES ( ) Kent Planning Dept ( ) Renton Planning Dept ( ) City of SeaTac ( ) City of Burien ( ) City of Seattle ( ) Strategic Planning *Notice of all Seattle Related Projects ( ) Puget Sound Regional Council ( ) SW KC Chamber of Commerce ( ) Muckleshoot Indian Tribe * ( ) Cultural Resources Fisheries Program ( Wildlife Program ( ) Duwamish Indian Tribe * Section 7 OTHER LOCAL AGENCIES ( ) Puget Sound Clean Air Agency ( ) Sound Transit/SEPA ( ) Duwamish River Clean Up Coalition * ( ) Washington Environmental Council ( ) People for Puget Sound * ( ) Futurewise * send notice of all applications on Green/Duwamish River ( ) Seattle Times ( ) South County Journal Section 8 MEDIA ( ) Highline Times ( ) City of Tukwila Website P:Admin\Admin Forms\Agency Checklist I'M 2/04,A e' ¢n' '1 TvriA akk__ Public Notice Mailings For Permits SEPA MAILINGS Mail to: (comment period starts on date of mailing) Dept. of Ecology Environmental Review Section *Applicant *Other agencies as necessary (checked off on attached list) *Any parties of record * send only the staff report, site plan and the SEPA Determination KC Transit Division — SEPA Official would like to receive information about all projects that might affect transit demand Tribes — For any application on the Green/Duwamish River, send the checklist and a full set of plans with the Notice Of Application Send These Documents to DOE: SEPA Determination (from PermitsPlus) Findings (staff report, usu. with MDNS) SEPA Checklist (filled out by applicant) Drawings/Plans of project (site plan, elevations, etc. from PMT's) Affidavit of Distribution (notice was mailed or sent to newspaper) SHORELINE MAILINGS: Notice of Application for a Substantial Development Permit must be mailed to owners and to property owners within 500 feet of subject property, comments are due 30 days after the notice of application is mailed/posted. The Notice of Application for a Shoreline Substantial Development Permit must include a statement that any person desiring to submit written comments on the application or desiring to receive notification of the final decision on the application may do so within 30 days of the Notice of Application. If a hearing will be held on the application, the hearing notice must include the information that written comments may be submitted, or oral presentation made at the hearing. Notice is sent to Ecology's NW Regional Office Shorelands & Environmental Assistance Program. Shoreline Permit Notice of Deciision: Mail to: (within 8 days of decision; 21 -day appeal period begins date of filing with DOE) — Notice to DOE must be by return receipt requested mail (this requirement included in SSB 5192, effective 7-22-11). Department of Ecology Shorelands Section, NW Regional Office State Attorney General *Applicant *Indian Tribes *Other agencies as necessary (checked off on attached list). *Any parties of record * send only the staff report, site plan and the SEPA Determination Send These Documents to DOE and Attorney General: Permit Data Sheet Shoreline Substantial Development Permit (printed out from PermitsPlus) Findings (staff report or memo) Shoreline Permit Application Form (filled out by applicant) Drawings/Plans of project (site plan, elevations, etc. from PMT's) Site plan, with mean high water mark & improvements Cross-sections of site with structures & shoreline Grading Plan — Vicinity map SEPA determination (3 -part from Sierra) Findings (staff report or memo) SEPA Checklist (filled out by applicant) Any background studies related to impacts on shoreline Notice of Application Affidavit of Distribution (notice was mailed) P:Admin\Admin Forms\Agency Checklist Carol Lumb From: Carol Lumb Sent: Tuesday, October 21, 2014 3:08 PM To: SEPAunit@ecy.wa.gov Cc: Cyndy Knighton; jtyndall2525@aol.com; Karen Walter (KWalter@muckleshoot.nsn.us); Larry D (DFW) Fisher Subject: SEPA Determination - E14-0010 - 42nd Ave. S. Road Improvements and Gilliam Creek Culvert Replacement Attachments: E14-0010_Staff_Rpt..pdf; E14-0010_NOD.pdf; SEPA App.pdf Dear SEPA Unit and Interested Parties: Attached please find the SEPA Notice of Decision and SEPA staff report for E14-0010, the 42nd Ave. S. Road Improvements and Gilliam Creek Culvert Replacement. Please let me know if you have any questions. Carol Carol Lumb, Senior Planner Department of Community Development City of Tukwila 6300 Southcenter Blvd., Suite 100 Tukwila, WA 98188 206-431-3661 Carol l umh('Tukrr lla l l a. t'o r Tukwila, the City of opportunity, the community of choice. 1 Carol Lumb From: Cyndy Knighton Sent: Monday, October 13, 2014 9:17 AM To: Carol Lumb Subject: FW: Gilliam Creek Culvert Replacement - e-mail #1 Attachments: LA_Plans_72414.pdf Carol, let me know if these answers are sufficient. They are embedded below the questions. Cyndy From: Rob.Rodland@CH2M.com [mailto:Rob.Rodland@CH2M.com] Sent: Monday, October 13, 2014 8:38 AM To: Cyndy Knighton; Eric.Haupt@CH2M.com Cc: Roger.Mason@CH2M.com Subject: RE: Gilliam Creek Culvert Replacement - e-mail #1 Cyndy — see below for my responses. Let me know if you have any questions. Thanks, Rob From: Jeremy [mailto:jtvndall25250aol.com] Sent: Friday, August 08, 2014 10:13 AM To: Carol Lumb Subject: Re: Gilliam Creek Culvert Replacement - e-mail #1 Hi Carol — Thanks for sending me the information. I'm still reviewing all the documents, but did have some questions on this first one. Please see below and let me know if these are questions you can answer and if not, who can. Thanks for all your help. Page 2: The question about hazardous substances is not marked. Is the answer yes or no? Response: (NOTE — this comment was in reference to the ESA Checklist.) The checklist will be updated to indicate No. The project will not result in the processing or handling, storage, or treatment of hazardous substances. Page 4: You indicate that no evergreen trees will be cleared within 200 feet. There is quite a bit of trees around the culvert. Do you anticipate removing any trees and if so will these be replaced/relocated? Response: (NOTE — this comment was in reference to the ESA Checklist. If needed I have also attached the Landscape Plan). The project requires the removal of trees and a landscape plan has been developed consistent with TMC 18.54, Tree Regulations. The landscape plan includes information on the number of trees that will be planted consistent with the ratios identified in TMC 18.54.130. Page 7: Under #4 (Plants) part D, what are 'live stakes'? Response: Live stakes are dormant, live, woody cuttings of a species with the branches trimmed off. Live staking helps to stabilize the soil by creating a root mat and binding soil particles together. Page 8: Under b. Noise, #2 You indicate that work would take place during daytime hours as allowed by the City of Tukwila Municipal Code. Do you anticipate that work will routinely last till 10 p.m. as allowed under this statute? If so, that causes me concern. Response: No, it is not anticipated that work will done during the full hours allowed for under the City Code. A typical end of day for construction work is much earlier than 10 pm. There are no plans at this time to have the work done with double shifts or into evening hours. Page 11: You indicate that some 'informal' parking spaces on private property may be affected. What does this mean? Which parking do you anticipate may be impacted? Also, where will all the people on this project be parking their work and/or personal vehicles? Will construction equipment be stored on site when not in use or overnight? Response: (need CH2 staff to address the specifics of the parking being impacted) The project widens the footprint of 42nd Avenue South within the existing City of Tukwila right-of-way to construct project improvements. In some locations where the existing shoulder was wide enough residents could use this area for parking, but during and after construction these informal spaces will be removed. These locations are limited given the width of the existing shoulder along much of the project area. Access is maintained to all existing driveways and parking lots along the project corridor. The selected contractor is responsible for procuring a job site to house a trailer for construction administration work and use as a lay -down yard to store construction materials in advance of the installation work. In some cases, workers will park their personal vehicles at this site. While work is underway, the work vehicles are anticipated to be throughout the work zone as needed. It is possible that construction equipment will be stored on the job site when not in use. At no point will the contractor be allowed to utilize private property for parking or storage unless prior arrangements are made. Arrangements could range from an informal agreement between the contractor and the private property owner or could be formalized in a Temporary Construction Easement granted to the City, depending on the situation. Sincerely, Jeremy Tyndall Original Message From: Carol Lumb <Carol.Lumb@TukwilaWA.gov> To: 'jtyndal12525@aol.com' <jtyndall2525@aol.com> Sent: Thu, Aug 7, 2014 10:08 am Subject: Gilliam Creek Culvert Replacement - e-mail #1 Dear Jeremy, Thank you for your telephone call this morning. I am attaching information from the file on the environmental review of the culvert replacement. Several of the documents are quite large, so you will receive 3-4 e-mails from me. The comment period that closes next Thursday at 5:00 is only for the environmental review of the culvert replacement. I understand from Cyndy Knighton that there will be outreach to property owners along 42nd Ave. South as more details of the project are clarified. I also understand that the project has now been delayed and will not begin until 2016. Please let me know if you have any questions. Carol Carol Lumb, Senior Planner 2 l Department of Community Development City of Tukwila 6300 Southcenter Blvd., Suite 100 Tukwila, WA 98188 206-431-3661 Carol. Lumb @TukwilaWa. qov Tukwila, the City of opportunity, the community of choice. 3 Carol Lumb From: Cyndy Knighton Sent: Wednesday, August 27, 2014 1:18 PM To: Carol Lumb Subject: RE: Tukwila's proposed 42nd Avenue South, Phase III road widening and culvert replacement project, E14-0010, Notice of Application/SEPA review Responses included in red below. From: Carol Lumb Sent: Thursday, August 14, 2014 5:06 PM To: Cyndy Knighton Subject: FW: Tukwila's proposed 42nd Avenue South, Phase III road widening and culvert replacement project, E14- 0010, Notice of Application/SEPA review Cyndy, Here are the comments we received from the Muckleshoot Indian Tribe — we can talk about response when you return. So far no other comments received. Carol From: Karen Walter Finailto:KWalter@muckleshoot.nsn.us] Sent: Thursday, August 14, 2014 4:13 PM To: Carol Lumb Cc: Fisher, Larry D (DFW); Cyndy Knighton Subject: Tukwila's proposed 42nd Avenue South, Phase III road widening and culvert replacement project, E14-0010, Notice of Application/SEPA review Carol, We have reviewed the City of Tukwila's proposed 42nd Ave South road widening project from Southcenter Boulevard/S 154th Street to S 160th Street including the replacement of the 42nd Avenue S culvert conveying Gilliam Creek. We appreciate the City's efforts to improve the 42nd Ave south culvert for fish passage and to replace the existing culvert with a new culvert designed using WDFW's Stream Simulation Method. We do have a question and some initial comments: 1. How was the 11 foot bankfull width determined for Gilliam Creek? We couldn't find documentation as to how the consultants determined this width as the appropriate bankfull width for Gilliam Creek in the project site. This is a key numeric as bankfull width is the variable used to determine the necessary culvert width for Stream Simulation. It is essential that this measurement be accurate for purposes of creating fish passage. The bankfull width was measured by a CH2M HILL biologist and Larry Fisher (WDFW Biologist) for the area downstream of the existing culvert. Points were taken about every 50 feet for a distance of 300 feet from the culvert. Given the undersized culvert and the dam structure located about 60 feet upstream of the culvert an accurate measurement could not be taken in this area. However, given the length of the culvert the same bankfull width measured on the downstream side would apply to the upstream side. Design of the culvert was based upon WDFW fish passage guidelines and design considerations made in the field by the WDFW Biologist. 2. Please note that the drawings and the project narratives describe a failed dam structure just 70 feet upstream of the culvert crossing (see Sheet 23 30% submittal March 2013). This structure should be removed as part of the 1 project as it has failed and is likely its own fish passage barrier and the City will be doing in -water construction at the site anyway. The dam structure is outside of the project limits and is not associated with the culvert replacement and roadway project. The dam is constructed on private property and has been in place for an estimated 50+ years. The City is aware of the failing dam, as well as other barriers to fish passage both up and downstream of the culvert. The City prioritizes removal of fish passage barriers which are in the public right of way but does encourage property owners to address them as well. 3. The project also proposes to treat some of the stormwater as part of the project where there is currently no stormwater treatment. Stormwater impacts to coho salmon were not identified as a potential issue in the materials we reviewed. As coho salmon are the most likely salmon species to be found in Gilliam Creek, they should be considered and stormwater treated to the fullest extent possible to reduce metals, oils, and PAHs found in stormwater. We are including some literature regarding this potential impact and concern. There are a number of fish barriers downstream that prevent fish from getting near the project location. Approximately 300 feet downstream there is a drop structure with debris cage. At this point, the stream drops about 8 feet straight down and enters a culvert under the roadway before daylighting again. Other fish barriers downstream include about 1,500 feet of culvert that includes a number of bends and larger stormwater detention facility. These numerous barriers prevent fish from getting close to the project site and the likely fish can only access those portions of Gilliam Creek in close proximity to the Green River. The project would reduce pollutant generating surfaces and pollutants would either be reduced or remain the same as existing conditions. The project would meet the King County Conservation Flow Control Standards. Prior to construction the contractor will be required to implement best management practices to minimize and avoid water quality impacts to Gilliam Creek. We appreciate the opportunity to review this proposal and look forward to the City's responses. Thank you, Karen Walter Watersheds and Land Use Team Leader Muckleshoot Indian Tribe Fisheries Division Habitat Program 39015 172nd Ave SE Auburn, WA 98092 253-876-3116 2 Carol Lumb From: Carol Lumb Sent: Thursday, August 14, 2014 5:06 PM To: Cyndy Knighton Subject: FW: Tukwila's proposed 42nd Avenue South, Phase III road widening and culvert replacement project, E14-0010, Notice of Application/SEPA review Attachments: Landscape Ecotoxicology of Coho Salmon Spawner Mortality in Urban watersheds.pdf; copper toxicity_visibility vulnerabilityjuv coho salmon predation by cutthroat trout_McIntyre et al 2012.pdf; Copper_effects_on_Salmonids_-_Abstracts_C A _Woodyl.pdf Cyndy, Here are the comments we received from the Muckleshoot Indian Tribe — we can talk about response when you return. So far no other comments received. Carol From: Karen Walter[mailto:KWalter@muckleshoot.nsn.usl Sent: Thursday, August 14, 2014 4:13 PM To: Carol Lumb Cc: Fisher, Larry D (DFW); Cyndy Knighton Subject: Tukwila's proposed 42nd Avenue South, Phase III road widening and culvert replacement project, E14-0010, Notice of Application/SEPA review Carol, We have reviewed the City of Tukwila's proposed 42nd Ave South road widening project from Southcenter Boulevard/S 154th Street to S 160th Street including the replacement of the 42nd Avenue S culvert conveying Gilliam Creek. We appreciate the City's efforts to improve the 42nd Ave south culvert for fish passage and to replace the existing culvert with a new culvert designed using WDFW's Stream Simulation Method. We do have a question and some initial comments: 1. How was the 11 foot bankfull width determined for Gilliam Creek? We couldn't find documentation as to how the consultants determined this width as the appropriate bankfull width for Gilliam Creek in the project site. This is a key numeric as bankfull width is the variable used to determine the necessary culvert width for Stream Simulation. It is essential that this measurement be accurate for purposes of creating fish passage. 2. Please note that the drawings and the project narratives describe a failed dam structure just 70 feet upstream of the culvert crossing (see Sheet 23 30% submittal March 2013). This structure should be removed as part of the project as it has failed and is likely its own fish passage barrier and the City will be doing in -water construction at the site anyway. 3. The project also proposes to treat some of the stormwater as part of the project where there is currently no stormwater treatment. Stormwater impacts to coho salmon were not identified as a potential issue in the materials we reviewed. As coho salmon are the most likely salmon species to be found in Gilliam Creek, they should be considered and stormwater treated to the fullest extent possible to reduce metals, oils, and PAHs found in stormwater. We are including some literature regarding this potential impact and concern. We appreciate the opportunity to review this proposal and look forward to the City's responses. Thank you, Karen Walter Watersheds and Land Use Team Leader 1 Muckleshoot Indian Tribe Fisheries Division Habitat Program 39015 172nd Ave SE Auburn, WA 98092 253-876-3116 2 Carol Lumb From: Carol Lumb Sent: Thursday, August 14, 2014 5:06 PM To: 'Karen Walter' Subject: RE: Tukwila's proposed 42nd Avenue South, Phase III road widening and culvert replacement project, E14-0010, Notice of Application/SEPA review Thank you Karen — we will review and provide responses in the staff report. Carol From: Karen Walter Finailto:KWalter@muckleshoot.nsn.usl Sent: Thursday, August 14, 2014 4:13 PM To: Carol Lumb Cc: Fisher, Larry D (DFW); Cyndy Knighton Subject: Tukwila's proposed 42nd Avenue South, Phase III road widening and culvert replacement project, E14-0010, Notice of Application/SEPA review Carol, We have reviewed the City of Tukwila's proposed 42"d Ave South road widening project from Southcenter Boulevard/S 154th Street to S 160th Street including the replacement of the 42nd Avenue S culvert conveying Gilliam Creek. We appreciate the City's efforts to improve the 42"d Ave south culvert for fish passage and to replace the existing culvert with a new culvert designed using WDFW's Stream Simulation Method. We do have a question and some initial comments: 1. How was the 11 foot bankfull width determined for Gilliam Creek? We couldn't find documentation as to how the consultants determined this width as the appropriate bankfull width for Gilliam Creek in the project site. This is a key numeric as bankfull width is the variable used to determine the necessary culvert width for Stream Simulation. It is essential that this measurement be accurate for purposes of creating fish passage. 2. Please note that the drawings and the project narratives describe a failed dam structure just 70 feet upstream of the culvert crossing (see Sheet 23 30% submittal March 2013). This structure should be removed as part of the project as it has failed and is likely its own fish passage barrier and the City will be doing in -water construction at the site anyway. 3. The project also proposes to treat some of the stormwater as part of the project where there is currently no stormwater treatment. Stormwater impacts to coho salmon were not identified as a potential issue in the materials we reviewed. As coho salmon are the most likely salmon species to be found in Gilliam Creek, they should be considered and stormwater treated to the fullest extent possible to reduce metals, oils, and PAHs found in stormwater. We are including some literature regarding this potential impact and concern. We appreciate the opportunity to review this proposal and look forward to the City's responses. Thank you, Karen Walter Watersheds and Land Use Team Leader Muckleshoot Indian Tribe Fisheries Division Habitat Program 39015 172nd Ave SE Auburn, WA 98092 253-876-3116 1 7 1 Carol Lumb From: Karen Walter <KWalter@muckleshoot.nsn.us> Sent: Thursday, August 14, 2014 4:13 PM To: Carol Lumb Cc: Fisher, Larry D (DFW); Cyndy Knighton Subject: Tukwila's proposed 42nd Avenue South, Phase III road widening and culvert replacement project, E14-0010, Notice of Application/SEPA review Attachments: Landscape Ecotoxicology of Coho Salmon Spawner Mortality in Urban watersheds.pdf; copper toxicity_visibility vulnerability juv coho salmon predation by cutthroat trout_McIntyre et al 2012.pdf; Copper_effects_on_Salmonids_-_Abstracts_C A _Woodyl.pdf Carol, We have reviewed the City of Tukwila's proposed 42nd Ave South road widening project from Southcenter Boulevard/S 154th Street to S 160th Street including the replacement of the 42nd Avenue S culvert conveying Gilliam Creek. We appreciate the City's efforts to improve the 42nd Ave south culvert for fish passage and to replace the existing culvert with a new culvert designed using WDFW's Stream Simulation Method. We do have a question and some initial comments: 1. How was the 11 foot bankfull width determined for Gilliam Creek? We couldn't find documentation as to how the consultants determined this width as the appropriate bankfull width for Gilliam Creek in the project site. This is a key numeric as bankfull width is the variable used to determine the necessary culvert width for Stream Simulation. It is essential that this measurement be accurate for purposes of creating fish passage. 2. Please note that the drawings and the project narratives describe a failed dam structure just 70 feet upstream of the culvert crossing (see Sheet 23 30% submittal March 2013). This structure should be removed as part of the project as it has failed and is likely its own fish passage barrier and the City will be doing in -water construction at the site anyway. 3. The project also proposes to treat some of the stormwater as part of the project where there is currently no stormwater treatment. Stormwater impacts to coho salmon were not identified as a potential issue in the materials we reviewed. As coho salmon are the most likely salmon species to be found in Gilliam Creek, they should be considered and stormwater treated to the fullest extent possible to reduce metals, oils, and PAHs found in stormwater. We are including some literature regarding this potential impact and concern. We appreciate the opportunity to review this proposal and look forward to the City's responses. Thank you, Karen Walter Watersheds and Land Use Team Leader Muckleshoot Indian Tribe Fisheries Division Habitat Program 39015 172nd Ave SE Auburn, WA 98092 253-876-3116 1 f Carol Lumb V—.(11L1/(-- From: Jeremy <jtyndall2525@aol.com> Sent: Friday, August 08, 2014 12:33 PM To: Carol Lumb Subject: Re: Gilliam Creek Culvert Replacement - e-mail #1 That works for me. Thanks again for your help. Original Message From: Carol Lumb <Carol.Lumb@TukwilaWA.gov> To: 'Jeremy' <jtyndall2525@aol.com> Sent: Fri, Aug 8, 2014 10:54 am Subject: RE: Gilliam Creek Culvert Replacement - e-mail #1 Jeremy, Thank you very much for your e-mail — I am going to check with Cyndy Knighton, in Public Works, to get answers to some of your questions. She is out of the office for a couple days, so I will get back to you as soon as I can next week. Carol From: Jeremy (mailto:itvndall2525@aol.coml Sent: Friday, August 08, 2014 10:13 AM To: Carol Lumb Subject: Re: Gilliam Creek Culvert Replacement - e-mail #1 Hi Carol — Thanks for sending me the information. I'm still reviewing all the documents, but did have some questions on this first one. Please see below and let me know if these are questions you can answer and if not, who can. Thanks for all your help. Page 2: The question about hazardous substances is not marked. Is the answer yes or no? Page 4: You indicate that no evergreen trees will be cleared within 200 feet. There is quite a bit of trees around the culvert. Do you anticipate removing any trees and if so will these be replaced/relocated? Page 7: Under #4 (Plants) part D, what are 'live stakes'? Page 8: Under b. Noise, #2 You indicate that work would take place during daytime hours as allowed by the City of Tukwila Municipal Code. Do you anticipate that work will routinely last till 10 p.m. as allowed under this statute? If so, that causes me concern. Page 11: You indicate that some 'informal' parking spaces on private property may be affected. What does this mean? Which parking do you anticipate may be impacted? Also, where will all the people on this project be parking their work and/or personal vehicles? Will construction equipment be stored on site when not in use or overnight? Sincerely, Jeremy Tyndall Original Message From: Carol Lumb <Carol.Lumb@TukwilaWA.gov> To: 'jtyndall2525 @aol.com' <jtyndall2525 @ aol.com> 1 Sent: Thu, Aug 7, 2014 10:08 am Subject: Gilliam Creek Culvert Replacement - e-mail #1 Dear Jeremy, Thank you for your telephone call this morning. I am attaching information from the file on the environmental review of the culvert replacement. Several of the documents are quite large, so you will receive 3-4 e-mails from me. The comment period that closes next Thursday at 5:00 is only for the environmental review of the culvert replacement. I understand from Cyndy Knighton that there will be outreach to property owners along 42nd Ave. South as more details of the project are clarified. I also understand that the project has now been delayed and will not begin until 2016. Please let me know if you have any questions. Carol Carol Lumb, Senior Planner Department of Community Development City of Tukwila 6300 Southcenter Blvd., Suite 100 Tukwila, WA 98188 206-431-3661 Carol. Lumb @TukwilaWa. qov Tukwila, the City of opportunity, the community of choice. 2 Carol Lumb From: Carol Lumb Sent: Thursday, August 07, 2014 10:08 AM To: 'jtyndall2525@aol.com' Subject: Gilliam Creek Culvert Replacement - e-mail #1 Attachments: SEPA App.pdf; a_Tukwila 42nd Phase III Plans - 30%.pdf Dear Jeremy, Thank you for your telephone call this morning. I am attaching information from the file on the environmental review of the culvert replacement. Several of the documents are quite large, so you will receive 3-4 e-mails from me. The comment period that closes next Thursday at 5:00 is only for the environmental review of the culvert replacement. I understand from Cyndy Knighton that there will be outreach to property owners along 42nd Ave. South as more details of the project are clarified. I also understand that the project has now been delayed and will not begin until 2016. Please let me know if you have any questions. Carol Carol Luna,b, Senior Planner Department of Community Development City of Tukwila 6300 Southcenter Blvd., Suite 100 Tukwila, WA 98188 206-431-3661 Carol.Lumb TukwilaWa.gov Tukwila, the City of opportunity, the community of choice. 1 Carol Lumb From: Carol Lumb Sent: Thursday, August 07, 2014 10:12 AM To: jtyndall2525@aol.com Subject: e-mail #3 Attachments: e_42nd Ave S - Phase III_CulvertTM_Dft.pdf; GilliamCreek_WetlandMemo_FINAL_ 070914.pdf; E14- 0010 NOA.doc This is the last e-mail. Carol Lumb, Senior Planner Department of Community Development City of Tukwila 6300 So u th cen ter Blvd, Suite 100 Tukwila, WA 98188 206-431-3661 CaroLL umb§Tukwila J'Va. go v Tukwila, the City of opportunity, the community of choice. 1 N Carol Lumb From: Carol Lumb Sent: Thursday, August 07, 2014 10:09 AM To: jtyndall2525@aol.com' Subject: e-mail #2 Attachments: LA Plans 7-24-14.pdf; Archaeologicallnvest_TechMemo_FINAL.pdf; c_Tukwila 42nd Phase III Basis of Design Memo - 30%.pdf; CH2MHill Section? ESA consult Itr 6-20-14.pdf; d_ 42nd Ave S - Phase III Stormwater Memorandum-Dft.pdf Carol Lumb, Senior Planner Department of Community Development City of Tukwila 6300 Southcenter Blvd, Suite 100 Tukwila, WA 98188 206-431-3661 Carol.L unnb§Tuk wila Wa,go v Tukwila, the City of opportunity, the community of choice. 1 1 eitg of gam& Department Of Community Development AFFIDAVIT OF DISTRIBUTION I, _Teri Svedahl , HEREBY DECLARE THAT: Mailer's signature: 4 /VJA' J( X Notice of Application Notice of Decision Notice of Public Hearing Notice of Public Meeting Determination of Non- Significance Mitigated Determination of Non - Significance Determination of Significance & Scoping Notice Short Subdivision Agenda Notice of Application for Shoreline Mgmt Permit Shoreline Mgmt Permit Board of Appeals Agenda Packet Board of Adjustment Agenda Packet Official Notice Notice of Action Other: Was mailed to each of the addresses listed/attached on this 30th day of _July 2014 Project Name: Gilliam Creek Project Number: PL14-0029 Associated File Number (s): E14-0010 SEPA Review Mailing requested by: Carol L s b Mailer's signature: 4 /VJA' J( W:\USERS\TERI\TEMPLATES-FORMS\AFFIDAVIT OF DISTRIBUTION.DOC Nl 1 "Qa NON ,v, ION 1G. Gilliam Creek 111 Ave42nd Ave. R®ad Project NUN - Project Description: Road improvement project to include sidewalks, bike lane/sharrow, lighting, storm drainage facilities and culvert replacement containing Gilliam Creek. The existing culvert is a non -fish passable, 92 -foot long, 3 -foot diameter concrete culvert & will be replaced with a 146 - foot long, 16 -foot wide by 8 -foot, 4 -inch rise sin- gle radius, corrugated metal pipe, fish passable culvert where the creek crosses 42nd Ave. S. City of Tukwila Notice of Application Project name/location: 42nd Avenue S. road widening from Southcenter Blvd/S. 154th St. to S. 160th St., including re- placement of a culvert carrying Gilliam Creek. File #: E14-0010 SEPA review Planner: Carol Lumb 206-431-3661 You are receiving this notice because you are a property owner or tenant within 500ft of this project. Your written com- ments on the project are requested and can be delivered to DCD, 6300 Southcenter Blvd., Suite 100, Tukwila, WA 98188. Comments must be received by 5:00 pm on Thursday, August 14, 2014. You may request a copy of any decision, information on hearings, and your appeal rights by calling 206-431-3661. 1 r AGENCY LABELS alF1S Corps of Engineers ederal HWY Admin ( ) Federal Transit Admin, Region 10 Dept of Fish & Wildlife Section 1 FEDERAL AGENCIES ( ) US Environmental Protection Agency (E.P.A.) ( )US Dept of HUD National Marine Fisheries Service Section 2 ( ) Office of Archaeology ( ) Transportation Department (WSDOT NW) ( ) Dept of Natural Resources ( ) Office of the Governor ( ) WA State Community Development ) WA Fisheries & Wildlife, MillCreek Office WA Fisheries & Wildlife, Larry Fisher, J 1775 12th Ave NW Ste 201, Issaquah WA 98027 WASHINGTON STATE AGENCIES ( ) Dept of Social & Health Services Dept of Ecology NW Regional Office, Shoreland Div. SHORELINE NOD REQUIRES RETURN RECEIPT Dept of Ecology, SEPA **Send Electronically ( ) Office of Attorney General ( ) Office of Hearing Examiner ( ) KC Boundary Review Board ( ) Fire District # 11 ( ) Fire District # 2 ( ) KC Wastewater Treatment Div ( ) KC Dept of Parks & Recreation ( ) KC Assessor's Office Section 3 KING COUNTY AGENCIES ( ) Health Department ( ) Port of Seattle ( ) KC Dev & Enviro Services-SEPA Info Center ( ) KC Metro Transit Div-SEPA Official, Environmental Planning ( ) KC Dept of Natural Resources ( ) KC Dept of Natural Resources, Andy Levesque ( ) KC Public Library System ( ) Foster Library ( ) Renton Library ( ) Kent Library ( ) Seattle Library Section 4 SCHOOLS/LIBRARIES ( ) Westfield Mall Library ( ) Tukwila School District ( ) Highline School District ( ) Seattle School District ( ) Renton School District ( ) QWEST Communications ( ) Seattle City Light ( ) Puget Sound Energy ( ) Highline Water District ( ) Seattle Planning &Dev/Water Dept ( ) Comcast Section 5 UTILITIES ( ) BP Olympic Pipeline ( ) Val-Vue Sewer District ( ) Water District # 20 ( ) Water District # 125 ( ) City of Renton Public Works ( ) Bryn Mawr-Lakeridge Sewer/Water Dist ( ) Seattle Public Utilities ( ) Waste Management emind ( ) Tukwila City Depy3rfinents Public Works ( ) Fire ( ) Police ( ) Finance ( ) Planning ( ) Building ( ) Parks & Rec ( ) Mayor ( ) City Clerk Section 6 CITY AGENCIES ( ) Kent Planning Dept ( ) Renton Planning Dept ( ) City of SeaTac ( ) City of Burien ( ) City of Seattle ( ) Strategic Planning *Notice of all Seattle Related Projects ( ) Puget Sound Regional Council ( ) SW KC Chamber of Commerce Muckleshoot Indian Tribe * Cultural Resources Fisheries Program Ry Wildlife Program Duwamish Indian Tribe * Section 7 OTHER LOCAL AGENCIES ( ) Puget Sound Clean Air Agency ( ) Sound Transit/SEPA ( ) Duwamish River Clean Up Coalition * ( ) Washington Environmental Council ( ) People for Puget Sound * ( ) Futurewise * send notice of all applications on Green/Duwamish River ( ) Seattle Times ( ) South County Journal Section 8 MEDIA ( ) Highline Times ( ) City of Tukwila Website P:Admin\Admin Forms\Agency Checklist Public Notice Mailings For Permits SEPA MAILINGS Mail to: (comment period starts on date of mailing) Dept. of Ecology Environmental Review Section *Applicant *Other agencies as necessary (checked off on attached list) *Any parties of record * send only the staff report, site plan and the SEPA Determination KC Transit Division — SEPA Official would like to receive information about all projects that might affect transit demand Tribes — For any application on the Green/Duwamish River, send the checklist and a full set of plans with the Notice Of Application Send These Documents to DOE: SEPA Determination (from PermitsPlus) Findings (staff report, usu. with MDNS) SEPA Checklist (filled out by applicant) Drawings/Plans of project (site plan, elevations, etc. from PMT's) Affidavit of Distribution (notice was mailed or sent to newspaper) SHORELINE MAILINGS: Notice of Application for a Substantial Development Permit must be mailed to owners and to property owners within 500 feet of subject property, comments are due 30 days after the notice of application is mailed/posted. The Notice of Application for a Shoreline Substantial Development Permit must include a statement that any person desiring to submit written comments on the application or desiring to receive notification of the final decision on the application may do so within 30 days of the Notice of Application. If a hearing will be held on the application, the hearing notice must include the information that written comments may be submitted, or oral presentation made at the hearing. Notice is sent to Ecology's NW Regional Office Shorelands & Environmental Assistance Program. Shoreline Permit Notice of Decision: Mail to: (within 8 days of decision; 21 -day appeal period begins date of filing with DOE) — Notice to DOE must be by return receipt requested mail (this requirement included in SSB 5192, effective 7-22-11). Department of Ecology Shorelands Section, NW Regional Office State Attorney General *Applicant *Indian Tribes *Other agencies as necessary (checked off on attached list). *Any parties of record * send only the staff report, site plan and the SEPA Determination Send These Documents to DOE and Attorney General: Permit Data Sheet Shoreline Substantial Development Permit (printed out from PermitsPlus) Findings (staff report or memo) Shoreline Permit Application Form (filled out by applicant) Drawings/Plans of project (site plan, elevations, etc. from PMT's) - Site plan, with mean high water mark & improvements — Cross-sections of site with structures & shoreline - Grading Plan — Vicinity map SEPA determination (3 -part from Sierra) Findings (staff report or memo) SEPA Checklist (filled out by applicant) Any background studies related to impacts on shoreline Notice of Application Affidavit of Distribution (notice was mailed) P:Admin\Admin Forms\Agency Checklist Carol Lumb From: Carol Lumb Sent: Wednesday, July 30, 2014 9:12 AM To: SEPAunit@ecy.wa.gov Subject: Gilliam Creek Culvert Replacement Notice of Application - email #1 Attachments: E14- 0010 NOA.doc; SEPA App.pdf; a_Tukwila 42nd Phase III Plans - 30%.pdf I am attaching a Notice of Application for SEPA review of a road improvement project that includes replacement of a non -fish passable culvert. As there are a number of documents related to this review, you will receive several e-mails with me. If you have any questions, please let me know. Carol Lumb Carol Lumb, Senior Planner Department of Community Development City of Tukwila 6300 Southcenter Blvd., Suite 100 Tukwila, WA 98188 206-131-3661 Caro1.I_umb Tukwila Wa.ggov Tukwila, the City of opportunity, the community of choice. 1 Carol Lumb From: Carol Lumb Sent: Wednesday, July 30, 2014 9:14 AM To: SEPAunit@ecy.wa.gov Subject: Gilliam Creek SEPA - email #2 Attachments: Archaeologicallnvest_TechMemo_FINAL.pdf; c_Tukwila 42nd Phase III Basis of Design Memo - 30%.pdf; CH2MHill Section7 ESA consult Itr 6-20-14.pdf; d_42nd Ave S - Phase III Stormwater Memorandum-Dft.pdf Carol Lumb, Senior Planner Department of Community Development City of Tukwila 6300 Southeenter Blvd, Suite 100 Tukwila, WA 98188 206-431-3661 Carol.Lurnb@T vltwiia Wa,gov Tukwila, the City of opportunity, the community of choice. 1 Carol Lumb From: Sent: To: Subject: Attachments: Carol Lumb Wednesday, July 30, 2014 9:18 AM SEPAunit@ecy.wa.gov/4° Mb Gilliam Creek SEPA - email #3 e_42nd Ave S - Phase III_Culver'ETM_Dft.pdf; GilliamCreek_WetlandMemo_FINAL_ 070914.pdf; LA Plans 7-24-14.pdf I 146 This is the final set of documents for review with SEPA file E14-0010. Carol Lumb Carol Lurm/b, Senior Planner Department of Community Development City of Tukwila 6300 Southcenter Blvd., Suite 100 Tukwila, WA 98188 206-431-3661 Carol.Lumh2T.akwila YVa.gov Tukwila, the City of opportunity, the community of choice. 1 ank you. kftfiid(j 1W"� Carol Lumb From: Carol Lumb Sent: Wednesday, July 30, 2014 9:21 AM To: SEPAunit@ecy.wa.gov Subject: Gilliam Creek SEPA - email #3 Attachments: GilliamCreek_WetlandMemo_FINAL_070914.pdf Carol Lumb, Senior Planner Department of Community Development City of Tukwila 6300 Southeenter Blvd., Suite 100 Tukwila, WA 98188 206-431-3661 Carol.Lumb@Tukwila J'Va.gov Tukwila, the City of opportunity, the community of choice. Carol Lumb From: Carol Lumb Sent: Wednesday, July 30, 2014 9:23 AM To: SEPAunit@ecy.wa.gov Subject: Gilliam Creek SEPA - email #4 Attachments: e_42nd Ave S - Phase III_CulvertTM_Dft.pdf; LA Plans 7-24-14.pdf This is the final e-mail with documents related to L14-0010, SEPA for Gilliam Creek culvert replacement and 42nd Ave. South road improvements. Carol Lumb, Senior Planner Department of Community Development City of Tukwila 6300SouthcenterBlvd., Suite 100 Tukwila, WA 98188 206-431-3661 CaroLLumbga. Tukwila J'Va.gov Tukwila, the City of opportunity, the community of choice. 1 Name Jacob A & Ashley A Kosea Chae Su & Ok Cha Duc Van & Vuong Them Lynn B & Angela M John W & Judith A * Marissa S Lori G Amete * Minewyelet F * Judith D Haris Douglas S Ferid & Dina Vernon H * Marvin E Todd A * Thomas W & Gretchen Rucchi Irina Melaine Michelle E Yolanda C Alvin M & Martinez Kristyna I Charles W Jr Ruth A Lamb Sammie LastName Freeman Kivumbi Chong Pham Mendenhall Farden TUKWILA CITY OF Ohoyo Leberer Bokretsin O'HARE COTTAGE WOODS LLC Yilma ASHOO & RACHNA LLC Otiato Sijamic Murray Masic Kaczmarski INTERSTATE PROPERTY HOLDING Anderson Johnson FLS DEVELOPMENT LLC Hope Diwan Morozov Shaner Phillips David Tapic Alford Erickson Monroe Address 1451 COUNTRY LN 4056 S 152ND ST 15123 42ND AVE S PO BOX 1513 15046 43RD PL S 15029 43RD PL S 6200 SOUTHCENTER BLVD 15122 42ND AVE S 2809 SW BATAAN ST 15120 42ND AVE S 967 UTSALADY RD 2606 2ND AVE # 539 3704 55TH ST NE 15405 42ND AVE 5 15234 40TH AVE S 20817 9TH AVE S 4024 S 154TH ST 15240 40TH AVE S 9112 185TH PL SE 13337 S ST # 591 15422 40TH AVE S # B 1801 S 93RD ST # C-27 5959 49TH AVE SW PO BOX 58264 4006 S 158TH ST # B 4006C S 158TH 4006 S 158TH ST # D 4006 S 158TH ST UNIT E 4006 S 158TH ST # F 4008 5158TH ST # A 4008 S 158TH ST # B 4008 C S 158TH CityState BELLINGHAM WA TUKWILA WA TUKWILA WA BOTHELL WA TUKWILA WA SEATTLE WA TUKWILA WA SEATTLE WA SEATTLE WA TUKWILA WA CAMANO ISLAND WA SEATTLE WA TACOMA WA TUKWILA WA TUKWILA WA SEATTLE WA TUKWILA WA TUKWILA WA EDMONDS WA CERRITOS CA TUKWILA WA SEATTLE WA SEATTLE WA SEATTLE WA TUKWILA WA SEATTLE WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA SEATTLE WA Zip 98225 98188 98188 98041 98188 98188 98188 98188 98126 98188 98282 98121 98422 98188 98188 98198 98188 98188 98026 90703 98188 98108 98136 98138 98188 98188 98188 98188 98188 98188 98188 98188 * THE DONALD CURTIS LEE TRUST 4008 D S 158TH ST SEATTLE WA 98188 Carie M Fix 4008 S 158TH ST UNIT E TUKWILA WA 98188 Sheila A Willard 4008 S 158TH ST F SEATTLE WA 98188 Tom J Dalton 4024 S 158TH ST # 13 TUKWILA WA 98188 Blake A Flickinger 4008 S 158TH ST # H TUKWILA WA 98188 Calvin M Crabtree 4008 5 158TH ST UNIT 1 TUKWILA WA 98188 James H Glover 4008-J S 158TH ST SEATTLE WA 98188 Laura Fuller 4008 K S 158TH ST SEATTLE WA 98188 Cary A Fujioka PO BOX 88181 SEATTLE WA 98138 Maurice Jr & Keisha D Scott 4012 S 158TH ST # B SEATTLE WA 98188 Naovarat & Vor Rittikaidachar 4012 S 158TH ST UNIT C TUKWILA WA 98188 * BANK OF AMERICA N A 7105 CORPORATE DR PLANO TX 75024 Bruce D Miller 4012 5 158TH ST # E SEATTLE WA 98188 Mehmed Salihovic 4012 S 158TH ST 3-23 TUKWILA WA 98168 Traci T Thirdgill 4012 S 158TH ST # G-24 TUKWILA WA 98188 Peter H Marcoff 4012 S 158TH ST # H TUKWILA WA 98188 Erick J & Phoebe M Cheng 4012 S 158TH ST UNIT I TUKWILA WA 98188 Donald C & Sharon A Pfaff 4012 S 158TH ST UNIT J TUKWILA WA 98188 Brett Wold 4012 S 158TH ST # K SEATTLE WA 98188 Julie Bradley 4012 S 158TH ST # 29 TUKWILA WA 98188 Gloria Tate 4010 5 158TH ST # F TUKWILA WA 98188 Almaz D Lemma 4010 S 158TH ST # E31 TUKWILA WA 98188 Katherine R Stearns 4010 S 158TH ST # D TUKWILA WA 98188 Anna Kasparova 4010 S 158TH ST # C TUKWILA WA 98188 Zerihun G Agizie 4010 S 158TH ST # B TUKWILA WA 98188 ) Marta H Gebremeskel 4010 S 158TH ST # A TUKWILA WA 98188 Daniel Henry Fuller Jahn 4004 S 158TH ST UNIT E36 TUKWILA WA 98188 James D Brown 4004 S 158TH ST # D SEATTLE WA 98188 Hsi Ting Chen 4004 S 158ST # C TUKWILA WA 98188 Austin Reed Hackett 32603 8TH AVE SW FEDERAL WAY WA 98023 Gwenevere Bulbula 4004 S 158TH ST TUKWILA WA 98188 Maria E Roaquin 4002 5 158TH ST # A TUKWILA WA 98188 Thomas G Bentley 4002 S 158TH ST # B 42 SEATTLE WA 98188 Kristi Lee Stakston 4002C S 158TH SEATTLE WA 98188 Zahra David 0 Tamara William Tracy D Teresa A James J Pastora C Ron & Victoria Alvin L Joyce Thomas Alben Mark A Gretchen M Heather T Laurie A Deleana William Michael W Rose A Ronald E & Lynn C Debra A Brian A Kathleen L Paul David Kathleen Steven B Jodi K Kurt R Sabrina D Volkmar & Peishan C Deborah L Barbara D Christopher Abdalla Vistaunet Baker Campbell Smith Ritzhaupt Duggan Brady Easterling Dimmitt Walters Bailey Mcclerran Haydel Pence Sheahan Guerrero Johnston Holland Castillo Ryyth Grant Dowdy Bowman Maxwell Mars Rehder Crick Mclaren Hawkins Gaussmann Vogel Keller Lowrance 4002 S 158TH ST # D 4002 S 158TH ST # E 4002 S 158TH ST # F 4002 S 158TH ST # 47 4002 S 158TH ST # H 4016 S 158TH ST # A 4016 B S 158TH ST 4016 S 158TH ST # C PO BOX 2656 4014-A S 158TH # 53 4014 S 158TH ST # B 4014 S 158TH ST UNIT C 15106 STONE LNN#G 301 4018 5 158TH ST # F 29198 28TH AVE W 4018 S 158TH ST # D 4018 5 158TH ST UNIT C 4018 S 158TH ST # B 4018 S 158TH ST UNIT A 4022 S 158TH ST # E 4022 S 158TH ST # D 4022 S 158TH ST # 65 4022 S 158TH ST # B 4022 S 158TH ST # A 4024 S 158TH ST # A 867 SEABECK HOLLY RD NW 4024 S 158TH ST # C 4024 S 158TH ST # D 4024 S 158TH ST # E 4024 S 158TH ST # F 4024 5 158TH ST # G74 4020 5 158TH ST # A 4020 S 158TH ST UNIT B 4020 S 158TH ST # C TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA SEATTLE WA TUKWILA WA SEATTLE WA SEATTLE WA ISSAQUAH WA SEATTLE WA SEATTLE WA SEATTLE WA SHORELINE WA TUKWILA WA SEATTLE WA SEATTLE WA TUKWILA WA SEATTLE WA TUKWILA WA SEATTLE WA TUKWILA WA SEATTLE WA TUKWILA WA TUKWILA WA SEATTLE WA SEABECK WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA SEATTLE WA 98188 98188 98188 98188 98188 98188 91888 98188 98027 98188 98188 98188 98133 98188 98199 98188 98188 98188 98188 98188 98188 98188 98188 98188 98188 98380 98188 98188 98188 98188 98188 98188 98188 98188 Teresa T * Nayer & Thao Ong Mary Louise * Tamela J Michael J Abdul R & Hazra Marvin Jr & Juanita L Lisa D * Vanly Jeremy Roger J & Tricia L Pal Flenis Jr Dianne J Gelie T & Ailene & Victo * Sabrina D Maria B Kenneth Robert & Ying Jie Joseph K C & Cheng Mary Emin Filomena Randi K Anthony N & Keshmi L Thomas J & Rebecca R Mike William H & Jolly Jud Ryan J & Biggerstaff G Kenneth B & Robin L Tanya A Lawrence & Daniele Le MG ACRES APARTMENTS LP Lee Vanness APOSTOLIC ASSEMBLY OF THE F Wolff Guerzon Hasan Johnson Moore WEST FREEMAN PROPERTIES Tuot Capalungan Caldwell Retesh Spears Ashley Rabena COUNTRYMAN LESLIE & MARYDEE Hawkins Colson Lee Cheng Cordic Ochoa Boyle Ram Flaherty Seifert Gilmore Hickey Totten Douthett Franklin 4020 S 158TH 10505 SORRENTO VALLEY RD 15660 42ND AVE S 15210 42ND AVE S 15436 42ND AVE S 15222 42ND AVE S 4234 S 154TH ST 15650 42ND AVE S 4210 S 154TH ST 15206 42ND AVE S 1810 15TH AVE STE C 15646 42ND AVE S 15642 42ND AVE S 15638 42ND AVE S 10459 4TH AVE S 4046 S 158TH LN 4042 S 158TH LN 4038 S 158TH LN 4034 S 158TH LN 4030 S 158TH LN 4032 S 159TH LN 4036 S 159TH LN 259 CLAUDIA CT 4044 S 159TH LN 4048 S 159TH LN 15814 40TH LN S 15818 40TH LN S 15822 40TH LN S 1655 SW MILLER CREEK RD 15834 40TH LN S # 17 15838 40TH LN S 4055 S 159TH LN # 19 4051 S 159TH LN 4033 S 159TH LN TUKWILA WA SAN DIEGO CA SEATTLE WA SEATTLE WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA SEATTLE WA TUKWILA WA TUKWILA WA TUKWILA WA SEATTLE WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA MORAGA CA TUKWILA WA TUKWILA WA SEATTLE WA TUKWILA WA TUKWILA WA NORMANDY PARK WA SEATTLE WA TUKWILA WA SEATTLE WA TUKWILA WA TUKWILA WA 98188 92121 98188 98188 98188 98188 98188 98188 98188 98108 98122 98188 98188 98188 98146 98188 98188 98188 98188 98188 98188 98188 94556 98188 98188 98188 98188 98188 98166 98188 98188 98188 98188 98188 Ernest J Sharina Tri Roza Shelley Getinet B Jose F Tomas Trisha C Patricia R Ruby Lee * Tamika D Matthew Barbara & Robert Stacy Lori Jorge A & De Serrano Martha E Gomez Marie Tung Thanh Richard B Ili David G Terence Lori S Miguel A & Sarah M Joyce Kenya L Asia L Jeremy R James L * Michael J & Melanie A * Dwight Lee Traylor Pham Bockelman Schrock Alewab Gonzalez Dizon Pilcher Taylor Jenkins LNV CORPORATION Roberson Coppins Burckhard Fernandez Jones Serrano Alani Nguyen Franks Saito Lee 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4039 S 158TH ST 15857 42ND AVE S 15837 42ND S 4035 158TH ST 4635 119TH AVE SE 217 ALDER ST#304 7319 BOWLYN PL S 900 MERIDIAN E # 19-427 37 VIEW RIDGE CIR 2415 S 284TH PL 15460 42ND AVE 5 15458 42ND AVE S 4350 S 156TH 4426 S 188TH PL 155256TH AVE SW#12 TUKWILA WA 98188 TUKWILA WA 98168 TUKWILA WA 98168 SAMMAMISH WA 98074 TUKWILA WA 98188 SEATTLE WA 98168 TUKWILA WA 98188 TUKWILA WA 98188 SEATTLE WA 98188 SEATTLE WA 98188 TUKWILA WA 98188 KIRKLAND WA 98034 TUKWILA WA 98188 TUKWILA WA 98188 SEATTLE WA 98108 TUKWILA WA 98188 TUKWILA WA 98188 SEATTLE WA 98188 SEATTLE WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 SEATTLE WA 98188 TUKWILA WA 98188 BELLEVUE WA 98006 EDMONDS WA 98020 SEATTLE WA 98118 MILTON WA 98354 LONGVIEW WA 98632 FEDERAL WAY WA 98003 TUKWILA WA 98188 TUKWILA WA 98188 SEATTLE WA 98188 SEATAC WA 98188 BURIEN WA 98166 Dung & Hoang Robert G & Ringe Anne Robert M & Anita A TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY Tra m Skinner Woolsey MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER 4066 S 158TH ST 4052 S 158TH ST 16030 40TH PL S 4020 S 158TH ST # B 4024 S 158TH ST # B 4006 S 158TH ST # A 4006 S 158TH ST # E 4008 S 158TH ST # E 4008 S 158TH ST # F 4024 S 158TH ST # G 4008 S 158TH ST # I 4008 S 158TH ST #1 4008 S 158TH ST # K 4012 S 158TH ST # C 4012 S 158TH ST # A 4012 S 158TH ST # 3-23 4012 S 158TH ST # D 4012 S 158TH ST # J 4012 S 158TH ST # #29 4010 S 158TH ST # #E31 4010 5 158TH ST # #D 4010 S 158TH ST # #C 4010 5 158TH ST # #B 4010 S 158TH ST # #A 4004 5 158TH ST # #E36 4012 S 158TH ST # I 4004 S 158TH ST # #C 4004 S 158TH ST # #B 4002 5 158TH ST # #A 4002 S 158TH ST # #D 4002 S 158TH ST # #E 4002 S 158TH ST # #F 4002 S 158TH ST # #47 4002 S 158TH ST # B TUKWILA WA 98188 TUKWILA WA 98188 SEATTLE WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER 4016 S 158TH ST # #A 4002 S 158TH ST # C 4016 S 158TH ST # B 4016 S 158TH ST # D 4014 S 158TH ST # A 4018 S 158TH ST # #F 4014 S 158TH ST # C 4014 S 158TH ST # D 4018 S 158TH ST # C 4237 S 160TH ST 15837 42ND AVE S 15820 42ND AVE S 4241 S 158TH ST 4059 S 158TH ST 4408 S 156TH ST 15422 40TH AVE S 15227 42ND AVE S 4220 SOUTHCENTER BLVD 4018 S 158TH ST # E 4018 S 158TH ST # A 4022 S 158TH ST # C 15827 42ND AVE S 15826 40TH LN 5 15428 40TH AVE S 4024 SOUTHCENTER BLVD 16036 42ND AVE S 15645 42ND AVE S 15420 40TH AVE S 15404 40TH AVE S 4021 SOUTHCENTER BLVD 4025 SOUTHCENTER BLVD 4015 SOUTHCENTER BLVD 16018 42ND AVE S 15834 40TH LN S TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER MEMBER 4035 S 158TH ST 15605 44TH AVE S 15654 42ND AVE S 4270 S 158TH ST 16200 42ND AVE S 4255 S 160TH ST 16012 42ND AVE S 4272 S 160TH ST 4350 S 156TH ST 4066 S 152ND ST 15430 40TH AVE S 4406 S 156TH ST 4044 S 152ND ST 4260 S 158TH ST 4055 S 159TH LN 4342 S 156TH ST 15413 42ND AVE S 4036 SOUTHCENTER BLVD 4230 SOUTHCENTER BLVD 15206 40TH AVE S 15625 42ND AVES # Al 15625 42ND AVES # A2 1562542ND AVES#A3 15625 42ND AVES # A4 15625 42ND AVES # A5 1562542ND AVES#A7 15625 42ND AVES # A8 15625 42ND AVE S # B9 15625 42ND AVE S # 10 1562542ND AVES#C11 1562542ND AVES#C13 15625 42ND AVE S # C14 15625 42ND AVE S # C15 15625 42ND AVE S#C16 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # D17 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # D18 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # D19 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # D20 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # D21 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # D22 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # D23 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # E25 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # E26 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # E27 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # E28 TUKWILA WA 98188 f 1 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # E29 TUKWILA WA 98188 'J TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # E30 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15625 42ND AVE S # E31 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4252 S 160TH ST TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4040 S 159TH LN TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15629 44TH AVE S TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15603 42ND AVE S TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15421 42ND AVE S TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4213 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4732 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4726 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4708 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4714 SOUTHCENTER BLVD TUKWILA WA 98188 _ f TUKWILA COMMUNITY MEMBER 4234 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4706 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4510 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4722 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4530 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4520 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4710 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4718 SOUTHCENTER BLVD TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4011 S 152ND ST TUKWILA WA 98188 TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY TUKWILA COMMUNITY MEMBER MEMBER MEMBER MEMBER 4240 S 158TH ST 15819 42ND AVE S 15409 42ND AVE S 4210 SOUTHCENTER BLVD TUKWILA WA TUKWILA WA TUKWILA WA TUKWILA WA 98188 98188 98188 98188 community member address city st zip TUKWILA COMMUNITY MEMBER 4015 SOUTHCENTER BLVD Apt B15 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4015 SOUTHCENTER BLVD Apt B16 TUKWILA WA 98188 TUKWILA COMMUNITY. MEMBER 4015 SOUTHCENTER BLVD Apt B17 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4015 SOUTHCENTER BLVD Apt B18 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4015 SOUTHCENTER BLVD Apt B19 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4015 SOUTHCENTER BLVD Apt B20 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4015 SOUTHCENTER BLVD Apt B21 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4015 SOUTHCENTER BLVD Apt B22 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C23 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C24 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C25 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C26 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C27 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C28 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C29 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C30 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C31 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C32 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C33 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C34 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C35 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4021 SOUTHCENTER BLVD Apt C36 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt Al TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt A10 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt All TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt Al2 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt Al TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt Al4 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt A2 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt A3 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt A4 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt A5 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt A6 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt A7 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt A8 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4025 SOUTHCENTER BLVD Apt A9 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4210 SOUTHCENTER BLVD Apt A TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4210 SOUTHCENTER BLVD Apt B TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4213 SOUTHCENTER BLVD Apt 15 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4213 SOUTHCENTER BLVD Apt 16 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4213 SOUTHCENTER BLVD Apt 17 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4213 SOUTHCENTER BLVD Apt 18 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4213 SOUTHCENTER BLVD Apt 19 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4213 SOUTHCENTER BLVD Apt 20 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4213 SOUTHCENTER BLVD Apt 21 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4213 SOUTHCENTER BLVD Apt 22 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4213 SOUTHCENTER BLVD Apt 23 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4213 SOUTHCENTER BLVD Apt 24 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4213 SOUTHCENTER BLVD Apt 25 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 1 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 10 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 11 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 12 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 13 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 14 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 2 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 3 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 4 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 5 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 6 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 7 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 8 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 4217 SOUTHCENTER BLVD Apt 9 TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15413 42ND AVE S Apt A TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15413 42ND AVE S Apt B TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15413 42ND AVE S Apt C TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15413 42ND AVE S Apt D TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15405 42ND AVE S Apt A TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15405 42ND AVE S Apt B TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15405 42ND AVE S Apt C TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15405 42ND AVE S Apt D TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15409 42ND AVE S Apt A TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15409 42ND AVE S Apt B TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15409 42ND AVE S Apt C TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15409 42ND AVE S Apt D TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15422 40TH AVE S Apt A TUKWILA WA 98168 TUKWILA COMMUNITY MEMBER 15422 40TH AVE S Apt B TUKWILA WA 98168 TUKWILA COMMUNITY MEMBER 15422 40TH AVE S Apt C TUKWILA WA 98168 TUKWILA COMMUNITY MEMBER 15422 40TH AVE S Apt D TUKWILA WA 98168 TUKWILA COMMUNITY MEMBER 15420 40TH AVE S Apt A TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15420 40TH AVE S Apt B TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15420 40TH AVE S Apt C TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15420 40TH AVE S Apt D TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15428 40TH AVE S Apt A TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15428 40TH AVE S Apt B TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15428 40TH AVE S Apt C TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15428 40TH AVE S Apt D TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15430 40TH AVE S Apt A TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15430 40TH AVE S Apt B TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15430 40TH AVE S Apt C TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15430 40TH AVE S Apt D TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15428 40TH AVE S Apt A TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15428 40TH AVE S Apt B TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15428 40TH AVE S Apt C TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15428 40TH AVE S Apt D TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15418 40TH AVE S Apt A TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15418 40TH AVE S Apt B TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15418 40TH AVE S Apt C TUKWILA WA 98188 TUKWILA COMMUNITY MEMBER 15418 40TH AVE S Apt D TUKWILA WA 98188 CITY OF TUKWILA NOTICE OF APPLICATION PROJECT INFORMATION The City of Tukwila Department of Public Works is requesting environmental review for a road widening project on 42nd Avenue South from Southcenter Blvd. to S. 160th Street. The road widening project includes: asphalt overlay and replacement, curb, gutter, bike lane/sharrow, sidewalks, lighting, storm drainage facilities, utility relocation and replacement of a 92 -foot long, 3 -foot diameter non -fish passable concrete culvert with a 146 -foot long, 16 -foot wide by 8 -foot, 4 -inch rise single radius, corrugated metal, fish passable culvert. Both the north and southbound lanes of 42nd Avenue South will have a 14 -foot wide shared lane for vehicles and bicycles and sidewalks a minimum of five -feet in width. Because the project is at 30% design, a Special Permission, Director permit will be required to establish the landscaping that will be planted in the Gilliam Creek stream buffer. This permit is an administrative decision by the Director of the Department of Community Development. Permits applied for include: E14-0010: State Environmental Policy Act (SEPA) Review. Other known required permits include: COE Section 404 permit; WDFW Hydraulic Project Approval; Ecology Section 401 Water Quality Certification; NPDES General Construction Permit; City of Tukwila Special Permission, Director Permit, Public Works Clearing and Grading. Studies submitted with the applications include: The City of Tukwila has provided the following studies/Memos in support of the SEPA application: Stormwater Technical Memorandum; Culvert Replacement Basis of Design Technical Memorandum; Archeological Investigation; Section 7 ESA Consultation, No -Effect Letter; Wetland and Jurisdictional Ditch Assessment for Gilliam Creek Culvert Replacement at 42nd Ave. S. FILES AVAILABLE FOR PUBLIC REVIEW The project files are available at the City of Tukwila. To view the files, you may request them at the counter at the Department of Community Development (DCD), located at 6300 Southcenter Boulevard #100. Please call the number listed below to make arrangements to view the files. Project Files include: E14-0010: State Environmental Policy Act (SEPA) review OPPORTUNITY FOR PUBLIC COMMENT Your written comments on the project are requested. They must be delivered to DCD at the address below or postmarked no later than 5:00 P.M., August 14, 2014. APPEALS You may request a copy of any decision, information on hearings, and your appeal rights by calling DCD at (206) 431-3670. For further information on this proposal, contact Carol Lumb at (206) 431-3661 or visit our offices at 6300 Southcenter Boulevard, Suite #100, Tukwila, WA 98188, Monday through Friday, 8:30 a.m. to 5:00 p.m. Application Filed: Notice of Completeness Issued: Notice of Application Issued: July 7, 2014 July 24, 2014 July 31, 2014 CL H:\\Gillaim Creek Culvert Replacement\E14-0010 NOA 07/29/2014 5:35 PM t Carol Lumb From: Carol Lumb Sent: Tuesday, July 29, 2014 4:45 PM To: Cyndy Knighton Subject: Project Complete Dear Cyndy, My apologies, I meant to e-mail you last week, after our meeting on July 24th to say that the SEPA for the Gilliam Creek culvert replacement and road improvement project is complete as of July 24, 2014 and that we are proceeding with the public notice, posting the site and beginning the preparation of the staff report. Please let me know if you have any questions. Carol Carol Lurnb, Senior Planner Department of Community Development City of Tukwila 6300 Southcenter Blvd, Suite 100 Tukwila, WA 98188 206-431-3661 CarolLumb@TukwilaWa.gov Tukwila, the City of opportunity, the community of choice. 1 Carol Lumb From: Cyndy Knighton Sent: Friday, July 18, 2014 8:50 AM To: Carol Lumb Cc: Eric.Haupt@CH2M.com; roger.mason@ch2m.com Subject: RE: E14-0010 Carol, I don't believe the plant removal is extensive but there is some. You have all the information I have available at this time but I am including the design team with this email so that they can see exactly what you need to process the SEPA. We are motivated to get the SEPA approved quickly as some of our other permits can't be issued until that is done. Regarding the notice sign, I am waiting on approval from Robin as to how he wants me to proceed. I do not know if Robin will direct me to have our own crews create and post the sign or if he will approve the use of FastSigns. I believe Minnie has already provided information to FastSigns. Cyndy From: Carol Lumb Sent: Thursday, July 17, 2014 5:51 PM To: Cyndy Knighton Subject: E14-0010 Cyndy, I am reviewing the Gilliam Creek culvert replacement project for completeness — the checklist says that vegetation will be removed as part of the road widening & culvert replacement but I don't' find a landscaping plan that shows where the vegetation/tree removal will occur and what the proposed native plantings are in the stream buffer. Do you have that information? If not I will need it to include with the materials that are sent out for public review — I know the Muckleshoot Tribe will be particularly interested in what is proposed, and if we had an urban environmentalist, I would be asking that person to look the landscaping plans over. If there are trees that will be removed, these need to be identified and, based on their size, replacement trees will be required to be planted. I believe Minnie has touched base on the need to make arrangements for the public notice sign — once this project is deemed complete, under TMC 18.104.080 B., we have 14 days to get the public notice sent out and the site posted. Please let me know when you expect to pay for the sign so I can send them the information they need for the notice board and finalize the postcard that will be sent out. Thanks very much, Carol Carol Lumb, Senior Planner Department of Community Development City of Tukwila 6300 Southcenter Blvd, Suite 100 Tukwila, WA 98188 206-431-3661 Carol Lumb§Tukwila Wa.go v 1 Carol Lumb From: Minnie Dhaliwal Sent: Friday, July 11, 2014 1:54 PM To: FASTSIGNS 157 (FASTSIGNS.157@fastsigns.com) Cc: Cyndy Knighton Subject: Notice Board for Gilliam Creek Culvert Replacement Alicia, There is a new landuse sign that needs to be posted. Cyndy Knighton will contact you to make the payment for this sign. I have copied her to this email. Here is the information that needs to be included on the sign. Cyndy will also let you know where to install the sign Please let me know when you think the sign could be installed. Project Name: 42"d Ave road widening and Gilliam Creek Culvert replacement File Number : E14-0010 Site address: 42nd Ave S from Southcenter Boulevard to S 160th St. Type of Action : SEPA Applicant: City of Tukwila, Public Works Minnie %Zilouzie Dl a�icua€ Planning Supervisor 'City of Tukwila 6300 Southcenter Blvd, Suite 100 Tukwila, WA 98188 Ph. 206-431-3685 Minnie.Dhaliwal@TukwilaWA.gov The City of choice, the community of opportunity 1 Carol Lumb From: Minnie Dhaliwal Sent: Friday, July 11, 2014 2:08 PM To: Teri Svedahl Cc: Carol Lumb Subject: SEPA notice request Attachments: Gilliam Creek notification map.docx; NWMapsNotification.xlsx Teri, I have entered a request for mailing labels and post card mailing (targeted to go out on July 25th) in Trakit for File Number E14-0010. I wanted to get you started on generating the mailing labels. I pulled out the addresses from NW maps and I have attached the list and the map for you to use. This is a street improvement project on 42nd Ave S from Southcenter Blvd to 5160th St. Feel free to use the attached list for property owners or pull out your own list if that is easier. Not sure how you'll figure out the tenants. We will get you a postcard and agency list next week. Minnie 1 0400 TO: : J City of Tukwila REC EnVEn Department of Community Development ,JUL, 09 2014 TUK'I LP' PUBLIC WORKS LAND USE PERMIT ROUTING FORM File Number E14-0010 Building Planning Public Works Fire Dept. Police Dept. Parks/Rec Project: Gilliam Creek Culvert Replacement and 42nd Ave Street improvements Address: 42nd Ave S from SC Boulevard to S 160th St Date transmitted: 7/8/2014 Response requested by: 7/22/2014 Staff coordinator: Carol Lumb Date response received: REVIEWERS: Please specify how the attached plans conflict with your ADOPTED development regulations, including citations. Be specific in describing the types of changes you want made to the plans. When referencing codes, please identify the actual requirement and plan change needed. The Planning Division review does not supplant each department's ability to administer its own regulations and permits. However, project consistency at the Planning review stage is important to minimize significant later design changes. More than minimal design changes require further Planning Commission review, even if alteration is required to satisfy a City requirement. This further review is typically a minimum 60 -day process. Requirements based on SEPA (e.g., not required by an adopted development regulation) MUST identify the impact being mitigated, the policy basis for requiring mitigation, and the method used to calculate the mitigation required. Calculations of project impacts and the mitigation required (e.g., water capacity, road level of service analyses, or turning analyses) may be required of the applicant. COMMENTS (Attach additional comment sheets and/or support materials as needed.) 0,0 h0, neo cow416/At Plan check date: 8o7/q Comments prepared by:— Update date: 0400 TO: City of Tukwila Department of Community Development File Number E14-0010 LAND USE PERMIT ROUTING FORM Building Planning Public Works Fire Dept. Police Dept. Parks/Rec Project: Gilliam Creek Culvert Replacement and 42nd Ave Street improvements Address: 42nd Ave S from SC Boulevard to S 160th St Date transmitted: 7/8/2014 Response requested by: 7/22/2014 Staff coordinator: Carol Lumb Date response received: REVIEWERS: Please specify how the attached plans conflict with your ADOPTED development regulations, including citations. Be specific in describing the types of changes you want made to the plans. When referencing codes, please identify the actual requirement and plan change needed. The Planning Division review does not supplant each department's ability to administer its own regulations and permits. However, project consistency at the Planning review stage is important to minimize significant later design changes. More than minimal design changes require further Planning Commission review, even if alteration is required to satisfy a City requirement. This further review is typically a minimum 60 -day process. Requirements based on SEPA (e.g., not required by an adopted development regulation) MUST identify the impact being mitigated, the policy basis for requiring mitigation, and the method used to calculate the mitigation required. Calculations of project impacts and the mitigation required (e.g., water capacity, road level of service analyses, or turning analyses) may be required of the applicant. COMMENTS (Attach additional comment sheets and/or support materials as needed.) /'7'' Plan check date? l' /y Comments prepared by: Update date: // 0 3 2 49+00 S.160TH ST 50+00 1-1 1-2 -3 // // // ///// ///// 1-4 ® C3 51+00 52+00 53+00 42ND AVE S. PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by dale designed ENM drawn JRT checked Prot en9 Wei Ir RIM CH2MH 1 LL® 0, 0 z w z / A DISTURBED AREA TO BE RE -VEGETATED TREE REMOVAL NO. OF IN STREAM REPLACEMENT BUFFER TREES REQUIRED 1-1 7" DECIDUOUS NO NOT REQ'D 6" DECIDUOUS NO NOT REQ'D 17" FIR NO NOT REQ'D (1-4) 18" FIR NO NOT REQ'D () 9" FIR NO NOT REQ'D (1-6) 12" MAPLE NO NOT REQ'D C1-79 24" MAPLE NO NOT REQ'D CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III LANDSCAPING PLAN MEM 0 20 40 SCALE IN FEET dab revisions 25 ##, file no LA.1 scale 1"=20' date 7/24/2014 H LINE LA -1 42ND 53 F 2 4' 54+00 55+00 42ND AVE S. 56+00 1— co a to 57+00 4 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BU 1 LDING- by dale designed PAM drawn JRT checked «g mar cad bk no RJM CH2MH I LL+ /0T /44r w z J U 1- 2 DISTURBED AREA TO BE RE—VEGETATED CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III LANDSCAPING PLAN M 0 20 40 SCALE IN FEET dale revisions 4e 0.4 F 61.1 0 26 \ # file no LA -2 scale date 7124/2014 m z Z J U H 4 2 ��r Jr/ A3r 3- 58+00 59+00 60+00 61+00 62+00 42ND AVE S. PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- date ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- sate designed EWH drawn JRT wee nroi ere irk Mid Ek no RJM CH2M H I LL® z Z 14' J 14' w z J S U H 4 2 A DISTURBED AREA TO BE RE -VEGETATED NO. OF IN STREAM REPLACEMENT TREE REMOVAL BUFFER TREES REQUIRED ("--) 7 CEDAR NO NOT REQ'D (2) 6" BIRCH NO NOT REQ'D CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III LANDSCAPING PLAN 0 20 40 SCALE IN FEET no age ••4 E� ;To O r fie no LA -3 sate f24 revisions Bate 72a!2Y2014 OOP .4 0 2 Jy 1908 e? -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- \ •• • • • \ • • • • • • • 63+00 64±00 65+00 42ND AVE S. S• 8 66+00 /-- /,• • • PUBLIC WORKS DEPT. date destined EWH dawn (81 Necked Pry aea Pry ale CH2M HILL. • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • LA -5 42ND w 2 J jjA DISTURBED AREA TO BE RE -VEGETATED TREE REMOVAL ( 4-1) 8" ALDER NO. OF IN STREAM REPLACEMENT BUFFER TREES REQUIRED NO NOT REQ'D CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III LANDSCAPING PLAN 0 20 40 SCALE IN FEET dale revisions % 28 fie no LA.4 scale 1-=20' date 7/242014 CO z z • • • • • • • • • o, BUFFER LIMIT 67+00 68+00 69+00 70+00 MATCH LINE 42ND AVE S. PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BU I LDING- BUFFER LIMIT dal. designed EH drawn JRT checked projeng RJM prof db field bk no • �i441. '%o0i00iiii'��si •�=LiieO'oei0ieieiei�* ee�0eeep'►e`ieeeeeee00e• 4,4.1s-4, ' .�0ee0ee®e0�4eeee0eeeee, �ae��e• e�e�e�e�e�e�e�e�e�e�pe�e4►���•4. •ewe°i%`i%%%%:ee"CEO � `ieieieiei0eiei►eleeeeeieie: e°eeeeeeeeeeee�`'eee!►eeeeeee--" 'OOOOOOOi►iei�ieieie� .e00000eei'Oe��ei0e.�• v ♦eeeeeepe�♦e� �OOOOO���Oi� •eeeeee►IC ♦►♦ ►eeees �e1e♦ 1 1 ieieieieiei DISTURBED AREA TO BE RE -VEGETATED DISTURBED AREA WITHIN BUFFER TO BE RE -VEGETATED TREE REMOVAL NO. OF IN STREAM REPLACEMENT BUFFER TREES REQUIRED (5-1A) TBD YES TBD (5-1B) TBD YES TBD C5-29 10" MAPLE YES 2 24" ALDER YES 6 (5-4) 20" ALDER YES 6 18" MAPLE YES 4 (5-6) 10" ALDER YES 2 12" MAPLE YES 2 ( 5-8) 18" MAPLE YES (5-9) 48" COTTONWOOD YESOT REQ'D2 1 4f1 0.4 imo W CH2MH I LL® CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III LANDSCAPING PLAN 0 20 40 SCALE IN FEET MN dab revisions r 29-\ i#, file no LA -5 scale 1'"20' date 7/24/2014 TECHNICAL MEMORANDUM CH2MHILL 42nd Avenue South Phase III, City of Tukwila Basis of Design for 30% Submittal PREPARED FOR: Cyndy Knighton, City of Tukwila COPY TO: Roger Mason, P.E., CH2M HILL PREPARED BY: Eric Haupt, CH2M HILL DATE: March 4, 2013 PROJECT NUMBER: 434540 Introduction BEcEN° '0.,01201 t;( �Mti,fu1MENT t)\x-4Ui' This technical memorandum presents the Roadway design criteria and includes a brief discussion of the design approach and outstanding issues. This project provides improvements along 42nd Avenue South from South Center Boulevard to South 160th Street. This road section is about 2,300 feet. The side streets will be improved to provide a transition into 42nd Avenue South. Improvements include roadway widening, asphalt overlay and replacement, curb, gutter, bike lane/sharrow, sidewalks, lighting, utility relocations, and a fish passable culvert replacement for Gilliam Creek. The roadway grade south of the SR518 overpass is very steep and the slope is up to 14 percent. A sag is located near the Gilliam Creek crossing. Roadway Design Criteria Criteria Existing Conditions Proposed Design Values Source Functional Classification Collector Collector City of Tukwila Speed Limit and Street Functional Classifications Posted Speed 30 30 City of Tukwila Speed Limit and Street Functional Classifications ADT 3160 5200 Average ADT per City of Tukwila counts (needs confirmation). Future volume assumes 2.5% growth over 20 years (needs confirmation) Terrain Rolling Rolling Design Speed NA 30 AASHTO Geometric Design of Highways & Streets Lane Width 11-12 11 Min AASHTO Geometric Design of Highways & Streets Shoulder Width 0-6' NA No shoulder provided Sidewalk Width 5.5' 5' Min City of Tukwila Walk & Roll Plan Shared Lane NA 14' Min City of Tukwila Walk & Roll Plan (Motorized/Bicycle) Bike Lane Width NA 5 Min City of Tukwila Walk & Roll Plan Planter Width NA 4 Min (Face of Curb to Sidewalk) Tukwila Walk & Roll Plan Pavement Cross Slope 1% - 3.5% 2% Typical (Range 1.5% - 3%) AASHTO Geometric Design of Highways & Streets Grade (min/max) 1%/16% 0.3%/11% AASHTO Geometric Design of Highways & Streets Exhibit 6-8 (criteria not met) Horizontal Clearance 0-8' 3' back of curb at intersections and driveways 18" back of curb elsewhere AASHTO Roadside Design Guide, 2011, 3.4.1 Stopping Sight Distance NA Varies based on slope. Refer to AASHTO guideline AASHTO Geometric Design of Highways & Streets Exhibit 6-2 based on 30mph Vertical Clearance 18' 14' Min AASHTO Geometric Design of Highways & Streets Intersecting street width 20-33' 24' Min 28' Tukwila Walk and Roll Tukwila PWE Standards — RS -01 Intersecting Street Curb Radius 25-30' 25' Min — Based upon Design Vehicle Tukwila PWE Standards — RS -02 ADA Requirements Crosswalks Yield or Stop controlled locations — 2% Non -Stop controlled locations — 5% Mid -Block Locations — Equal to street Grade (PROWAG Section R302.5.1) (MEF Justification will be required because we are unable to meet this criteria.) Curb Ramps 4' Min Landing Area 2% Max Cross Slope 8.33% Max Ramp Slope 10% Max Wing Slope WSDOT Standard Plan F-40.12-01 and F-40.15.01 Sidewalk 2% Max Cross Slope Running slope to match terrain Roadway Design Approach • The roadway section includes one lane in each direction with a widened lane in the downhill direction to accommodate vehicles and bicycles (Sharrow) and a 5' Bike lane in the uphill direction. Curb, gutter, sidewalk and planter strips have been added on both the east and west sides. Planters have been eliminated in several locations to help conform to existing property interfaces and reduce the need for retaining walls. • The pavement section used for the cost estimate is 6" HMA over 6" CSBC. We have not done our pavement analysis so this is subject to change. It is fairly conservative so we do not anticipate the numbers to go up (possibly down). Phases I and II used 4" ACP over 4" ATB. • The South limit of the project was set to avoid construction beyond the City Limits. • The crest vertical curve was set at the south end of the project to exceed the site distance for a 30mph design speed. This profile requires raising the roadway between stations 50+60 and 54+80 by up to 2'-3". Because of this profile change, the southern portion of the project (up to station 54+80) requires full depth pavement replacement. • For the area north of this first crest curve, the approach is to overlay the existing road out to the current fog line, sawcut along the fog line and construct full depth widening with sidewalks and planters beyond the sawcut. • At the north end of the project approaching Southcenter Blvd., the roadway widens to a 3 lane section to accommodate the left turn pocket at the intersection. In order to continue the bicycle facilities to Southcenter Blvd. the roadway was widened 2.5'. The approach taken was to do all of the widening on the east side in order to keep the existing sidewalk on the west side and avoid impacting the existing rockery wall behind the sidewalk. • At the Culvert, the planters were eliminated to narrow the section to keep the culvert length to a minimum. Concrete barrier was added at the back of the walk. • Based on the original design report, there are two areas that require Unsuitable Foundation Excavation. See Outstanding Issue #7 below. • Retaining walls are required in several locations. Where practical Modular Block retaining walls (Key Stone or similar) are used as these are generally the least expensive. At the south end of the project on the east side, there is a new house currently under construction. This lot is depressed such that a 6' to 8' fill wall is needed at the back of the sidewalk. Because there is an existing Water line under the sidewalk a Cast -in place, reinforced concrete retaining wall is proposed at this location (the modular block wall would require straps that would conflict with the water line). Walls running along the driveway into the property are necessary to bring the driveway down to the house. See outstanding issue #1 below. • Right of Way/Property impacts — By narrowing the sidewalks and using parallel curb ramps (WSDOT Std. plan F-40.12-01) at the intersections, the need to purchase any right of way for this project is eliminated. However, some properties will be impacted in order to conform the frontage with the back of the proposed sidewalk. Profiles for each driveway will be developed to determine the limits of reconstruction that will be required to each driveway. This work will require coordination with the property owner. Outstanding Issues 1) For the property at the NE corner of 42"d Ave and 160th St., there is an opportunity to develop a less expensive solution by coordinating with the property owner. Options include constructing a smaller rockery or Modular block wall at the base of the slope (on the private property) where there is no Water Line conflict. The driveway slope could be designed in a way that could eliminate the need for walls along the driveway edge. 2) SPU Water valve box — At the NW corner of 42"d and 160th, there is an existing SPU water valve with an above ground cabinet that is in conflict with the proposed sidewalk layout. Coordination with SPU representatives in the field will be needed to assess whether this can be lowered or relocated. 3) Excavation for construction of the culvert at Gilliam Creek will impact several utilities. A coordination meeting with the utility engineers is needed to review the 30% plans, and begin coordinating temporary support, bypass and/or relocation of these facilities during the construction of the culvert. These utilities include: a. SCL/Comm. Joint Ductbank b. Sanitary Sewer (24") c. PSE Gas (12" and 4") d. Water(12") 4) Illumination — Timber Utility poles will be relocated south of the SR 518 crossing where power and communications will remain overhead. The existing illumination is mounted on these poles along the west side of the road. The need for additional lighting has not been assessed at this time. An allowance of $65,000 has been included to account for potential illumination needs. 5) Landscaping — An allowance of $80,000 has been included for landscaping costs. The City will need to provide direction on types of plantings that are preferred. 6) The cost estimate includes the removal of all existing hydrants and installation of new hydrants. Some of the existing hydrants could potentially be relocated to reduce costs. The City will need to provide direction on how to allocate costs between the City and the Water district. 7) As noted above, Unsuitable Foundation Excavation based on the original geotechnical report has been included in the opinion of costs. CH2M HILL Geotechnical Engineers walked the site and saw no indication of pavement stress along the southern section between stations 53+00 to 54+50. With additional information we may determine that the Unsuitable Foundation Excavation in this section is unnecessary. 8) Due to the steep grades on the existing roadway, the ADA requirement for cross slope at crosswalks cannot be met. A maximum -extent -feasible (MEF) memo will be required to document the justification for the non-standard crosswalk. TECHNICAL MEMORANDUM CH2MHILL 42nd Avenue South Phase III, City of Tukwila Basis of Design for 60% Submittal PREPARED FOR: COPY TO: PREPARED BY: Cyndy Knighton, City of Tukwila Roger Mason, P.E., CH2M HILL Eric Haupt, CH2M HILL/ Raymond Chung, CH2M HILL DATE: August 19, 2014 PROJECT NUMBER: 434540 Introduction This technical memorandum discusses the 60% plan submittal and outstanding issues that need to be addressed as we move forward. Outstanding Issues - Roadway 1) Soldier Pile Walls — a. At the South end of the project, on the east side of the road there are two walls that we are now showing as Soldier Pile walls. The change to soldier pile walls addressed the issue of impacts to utilities that are inherent with other wall types. There is a water main and a telephone ductbank above the wall. We have boosted the cost from $80/SF to $120/SF to cover. the additional cost, but the actual cost will depend on some of the design details such as the wall facing/appearance. b. There may be an opportunity to develop a Tess expensive solution by coordinating with the property owner. Options include constructing a smaller rockery or Modular block wall at the base of the slope (on the private property) where there is no Water Line conflict. 2) Driveways — a. The 60% plans have detailed information on the impacts at driveway. We have provided driveway profiles for the more difficult locations and the limits of pavement removal and restoration are shown on the Demo and Paving plans. b. As we move towards 90% we can look at ways to reduce some of these impacts by modifying the roadway cross slope. c. We will need to meet with property owners to share the construction impacts along their frontage. 3) Landscaping and Hardscapes — a. Based on discussions with the City, the area between the roadway and the sidewalk will not be planted. We have shown this as a paved area and covered it in the cost estimate under the bid item Unit Pavers. There are several options for this area that we can discuss. i. Stamped/Colored concrete ii. Concrete Sidewalk with a sawcut/scoring pattern iii. Paver stones b. The disturbed areas behind the sidewalks will need to be planted. We have an allowance of $10,000 for landscaping costs in the estimate. The City will need to provide direction on types of plantings that are preferred. Options include: i. Hydroseed ii. Ground cover iii. Bark/Mulch iv. Shrubs v. A combination of the above. 4) Illumination — a. Timber Utility poles will be relocated south of the SR 518 crossing where power and communications will remain overhead. The existing illumination is mounted on these poles along the west side of the road. The current assumption is that roadway lighting will continue to be provided by cobra head lights mounted on these timber poles. b. The need for additional lighting has not been assessed at this time but could include separate luminaires and lighting under the bridge. c. An allowance of $65,000 has been included to account for potential illumination needs. 5) Utility Work — a. SCL will relocate their poles and wires. Some of this work may not be able to be done until the finished grades are established, so coordination with the contractor will be required. b. Highline Water will need to have a vault located at the NW corner of 42"d and 160`h. This work will be designed by Pace Engineers and likely included in the project work as it cannot be done until the retaining wall is constructed and finished grade is established. 6) Construction Staging i. A construction staging plan is included. The Plans proposed 2 stages. ii. Stage 1 is the segment of work between S160th Street and S 158`h Street. Due to the changes in roadway grade, 42nd Ave S may only allow local access for a certain period of time. iii. Stage 2A will construct the work between S 158`h Street to south of the Gilliam Creek culvert while Stage 2B will construct the rest of the project including the culvert. 1. During Stage 2 the 42' Ave S between Southcenter Boulevard to S 158th Street will be closed, and local access only. One lane two way traffic will be provided between S 158th Street to the Gilliam Creek. 2. Between Gilliam Creek to Southcenter Boulevard will be completely closed. Outstanding Issues - Drainage 1) Stormwater detention and flow control The underground detention vault is replaced with an open pond to the property adjacent to the Gilliam Creek. The Pond is only at a concept design stage to show the approximate configuration, footprint, and impacts to the property. More survey is needed to confirm the footprint of the house and impact of the fenced backyard. A sketch was sent to the City for the potential of re -configure the fenced backyard. More discussion with the City is needed to progress the design. 2) Storm Water Treatment A Department of Ecology approved pre-treatment unit is proposed to provide treatment to the runoff from the project and off-site area upstream of the project south of SR518. Additional treatment facility upstream of the pond was consider. However, due to the backwater effect from the pond to the device. It may not be feasible to install an end of pipe treatment facility. Outstanding Issues - Culvert 1) Road Closure for construction of the Culvert — a. Duration of culvert construction i. Roadway Excavation — 1 week ii. Utility Relocation — 3 weeks iii. Culvert construction — 4 weeks iv. Utility restoration —4 weeks v. Pavement Restoration 2 weeks vi. Total Roadway Closure —14 weeks b. Traffic Detour i. A detour route has been shown in the plan. 2) Private Utilities Support/Relocation - Excavation for construction of the cuiivert at Gilliam Creek will impact the following utilities: a. SCL/Comm. Joint Ductbank — SCL has agreed that they will reimburse for the costs associated with the design and construction of the support system for the Electrical Ductbank. This can either be designed by CH2M Hill (not included in our current scope) or specs can be written to have the contractor design a support system. We will need a separate bid schedule for this work — costs to be reimbursed by the Utility. b. Sanitary Sewer (24") — A sewer bypass system will need to be installed. It is our understanding that this will be designed by Valley View Sewer/Pace engineering. Plans for this work will be included in the Bid Documents to be bid and constructed as part of the contract work. We will need a separate bid schedule for this work — costs to be reimbursed by the Utility. c. PSE Gas (12" and 4") — PSE will design and construct a system to support their gas lines. The project specifications will need to address the time required for this 3rd party work so that it does not result in a delay claim. d. Water (12") — Our understanding is that the water main can be cut and capped during the culvert construction, and restored after completion. Plans will be provided by the KC Water District/Pace Engineers to be included in the bid documents. We will need a separate bid schedule for this work — costs to be reimbursed by the Utility. 3) Landscape Restoration a. The Landscaping plans included in the 60% set were prepared in support of the SEPA application, and do not include details on the restoration of the landscaping. b. As part of the Permit requirements, trees removed that fall inside the stream buffer will need to be replaced. The number of new trees to be planted within the stream buffer are shown in a table on those plans. Type/Size/Location of these trees has not yet been determined. c. Other Stream buffer plantings have not been describe yet. d. Interpretive Area — there has been some discussion about creating an interpretive area along the stream. We need to discuss this and develop these plans as part of the 90% submittal. Outstanding Issues - Cost Estimate and Specifications 1) Cost Estimate — Compare the 30% and 60% estimates. The new cost for Schedule A is $2.42 million, an increase of $163,000 from the 30% estimate. The updated construction cost Schedule B (Gilliam Creek Culvert) is $655,000. The major changes are listed below. a. Based on the construction staging and sequence, we have increased the hours for Flaggers and Spotters, and Other Traffic Control Labor. The combined cost has increased by $90,000. b. Walls RW -1R and RW -2R — Geotechnical engineer recommends small soldier pile walls (Reinforced Concrete Retaining Wall) to avoid impact to Utilities. This change adds $120,000. c. Replaced Unit Pavers instead of the Landscaping Planters. The cost decreased by $40,000. d. Other major changes are from the following items: i. Increased quantities for Gravel Borrow Including Haul ii. Increased quantities for Modular Block Retaining Wall iii. Added items for potholes and Utility Conflicts Resolutions. iv. Added items for pavement repair within the overlay area. v. Eliminated allowance for miscellaneous items (was 10 percent of project cost). 2) Specifications- We will use standard WSDOT (2014) specifications as much as possible. Items that will likely require special provisions include: a. Coordination with private utilities — to allow time for PSE and others to perform necessary work to relocate/support facilities b. Hardscapes — If unit pavers, or stamped concrete are chosen, these will be special items c. Retaining Walls will likely require some special provisions d. Pond, Flow control, stormwater treatment 1 City of Tukwila - 40th - 42nd Ave South - Phase III 30% Cost Estimate CEIVFr) JUL 0 7 201 1)E VELUNMEN ! Schedule A - Roadway $ 2,261,910.00 Schedule B - Gilliam Creek Culvert Replacement $ 628,530.00 Total $ 2,890,440.00 3/4/2013 Summary 30% Tukwila 42nd Engineers Estimate - Combined.xlsx City of Tukwila - 40th - 42nd Ave South - Phase III Schedule A - Roadway 30% Cost Estimate Item No. Sec. No. Item Description Quantity Unit Unit Price Total Price 1 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 1-04 1-09 1-10 1-10 1-10 1-10 1-10 1-10 2-01 2-01 2-02 2-02 2-02 7-05 7-05 2-02 2-02 2-02 2-02 2-02 2-02 2-02 2-02 2-03 2-03 2-03 2-09 2-12 4-02 4-04 4-04 5-04 5-04 5-04 5-04 6-11 6-13 6-13 7-04 7-04 7-04 7-04 7-04 7-05 7-05 7-05 7-05 7-05 7-05 Minor Changes Mobilization Traffic Control Labor (Min. Bid $34.00 per hour) Traffic Control Supervisor Construction Signs Class A 1 1 800 1 250 Eq. Adj. LS HR LS SF Sequential Arrow Sign 45 Portable Changeable Message Sign 45 Outside Agency Uniformed Police Flagging Labor 1 Clearing and Grubbing 1 Roadside Cleanup 1 Removal of Catch Basin or Storm Manhole 18 Removal of Storm Drain Pipe 2949 Remove and Reset Fence 0 Adjust Catch Basin Adjust Manhole Remove Fence Remove Asphalt Concrete Pavement Remove Cement Concrete Sidewalk Removal of Curb and Gutter Removal of Extruded Curb 5800 2100 180 100 Remove Raised Pavement Markings Pavement Sawing 3500 Remove Hydrant 6 Roadway Excavation Including Haul 500 Unsuitable Foundation Excavation 360 Gravel Borrow Including Haul 1458 Shoring or Extra Excavation Class B 2500 Detention Structure Shoring System 1 Aggregate Subbase Crushed Surfacing Top Course 50 Crushed Surfacing Base Course 3400 HMA Cl. 1/2 -inch PG 64-22 (Class B) 1400 HMA Cl. 1 -inch PG 64-22 (Class E) 800 HMA for Pavement Repair Cl. 1/2 -inch PG 64-22 0 Planing Bituminious Pavement 5650 Single Sloped Concrete Barrier, Dual Faced 140 Reinforced Concrete Retaining Wall 1275 Modular Block Retaining Wall Schedule A Storm Sewer Pipe 12 In Dia Schedule A Storm Sewer Pipe 18 In Dia Schedule A Storm Sewer Pipe 24 In Dia Schedule A Storm Sewer Pipe 30 In Dia Double Barrel CMP Detention Structure Catch Basin Type 1 (Connect to 12" CPEP) Catch Basin Type 2 (48 In. Diam. Connect to 18" CPEP) Catch Basin Type 2 (54 In. Diam. Connect to 24" CPEP) Catch Basin Type 2 (60 In. Diam. Connect to 30" CPEP) Flow Control Structure Stormwater Pre -Treatment Units 1225 1282 1275 ........_.__ 520 240 ............... 28 13 3 1 2 DAY DAY Eq. Adj. LS Eq. Adj. EA LF LF EA EA LF SY SY LF Eq. Adj. $ 15,000.00 111,100.00 $ 111,100.00 47.00 $ 10,000.00 $ 37,600.00 10,000.00 15.00 $ 3,750.00 $ 50.00 $ 2,250.00 $ 75.00 $ 3,375.00 $ 2,000.00 $ 2,000.00 $ 5,000.00 $ 5,000.00 $ 5,000.00 $ 5,000.00 $ 350.00 $ 6,300.00 $ 5.00 $ 14,745.00 35.00 $ 400.00 $ 400.00 $ $ 30.00 $ $ 6.00 $ 34,800.00 $ 12.00 $ 25,200.00 $ 10.00 $ 1,800.00 LF LS LF EA ._..-.......... CY CY CY SF LS TON TON TON TON TON TON SY LF SF SF LF LF LF LF LS EA EA EA EA EA EA 8.00 $ 800.00 $ 2.50 $ _ . 8,750.00 $ 500.00 $ 3,000.00 $ 15.00 $ 7,500.00 $ 19.00 $ 6,840.00 $ 20.00 $ 29,160.00 $ 1.00 $ 2,500.00 $ 24,200.00 $ 24,200.00 $ 20.00 $ 1,000.00 $ 20.00 $ 68,000.00 $ 92.00 $ 128,800.00 $ 92.00 $ 73,600.00 $ 5.00 $ 28,250.00 $ 100.00 $ 14,000.00 $ 80.00 $ 1.02,000.00 $ 30.00 $ 36,750.00 $ 49.00 $ 62,818.00 $ 68.00 $ 86,700.00 $ 87.00 $ 45,240.00 $ 114.00 $ 27,360.00 - -- --- --- -- $ 82,717.07 $ 82,717.07 $ 1,100.00 $ 30,800.00 $ 3,500.00 $ 45,500.00 $ 4,500.00 $ 18,000.00 $ 5,500.00 $ 16,500.00 $ 6,500.00 $ 6,500.00 $ 9,750.00 $ 19,500.00 3/4/2013 SCHEDULE A 30% Tukwila 42nd Engineers Estimate - Combined.xlsx City of Tukwila - 40th - 42nd Ave South - Phase III Schedule A - Roadway I � + 30% Cost Estimate Item No. Sec. No. Item Description Quantity Unit Unit Price Total Price 50 7-05 Connect to Existing Drainage Structure 8 EA $ 700.00 $ 5,600.00_ 51 7-14 Hydrant Assembly 6 EA $ 6,000.00 $ 36,000.00 52 8-01 Temporary Water Pollution/Erosion Control Installation & SWPPP 1 LS $ 87,000.00 $ 87,000.00 53 8-01 Erosion/Water Pollution Control 1 Eq. Adj. $ 15,000.00 $ 15,000.00 54 8-02 Tree Grate and Frame 0 EA $ 1,500.00 $ - 55 8-02 Landscaped Planters 8330 SF $ 10.00 $ 83,300.00 56 8-04 Cement Concrete Traffic Curb and Gutter 4440 LF $ 16.00 $ 71,040.00 57 8-04 Cement Concrete Traffic Curb 0 LF $ 16.00 $ - 58 8-06 Industrial and Commercial Driveway SY $ 50.00 $ - 59 8-07 Precast Dual Faced Sloped Mountable Curb 0 LF $ 20.00 $ - 60 8-09 Raised Pavement Marker Type 1 EA $ - 61 8-09 Raised Pavement Marker Type 2 EA $ - 62 8-12 Chain Link Fence Type 293 LF $ 10.00 $ 2,930.00 63 8-14 Cement Concrete Sidewalk 2666.6667 SY $ 32.00 $ 85,333.33 64 8-14 Cement Concrete Driveway Approch 500 SY $ 25.00 $ 12,500.00 65 8-14 Curb Ramp 12 EA $ 1,000.00 $ 12,000.00 66 8-18 Relocate Mailbox 14 EA $ 500.00 $ 7,000.00 67 8-22 Paint Line 4285 LF $ 0.40 $ 1,714.00 68 8-22 Painted Wide Line 75 LF $ 0.50 $ 37.50 69 8-22 Plastic Crosswalk Stripe and Stop Bar (24 inch wide) 30 LF $ 7.50 $ 225.00 70 8-22 Plastic Traffic Arrow 2 EA $ 80.00 $ 160.00 71 8-22 Plastic Traffic Letter 0 EA $ 50.00 $ - 72 8-22 Painted Bicycle Marking 9 EA $ 60.00 $ 540.00 73 8-22 Plastic Sharrow Marking 11 EA $ 120.00 74 8-22 Removal of Plastic Markings 0 LS $ - 75 8-23 Temporary Pavement Markings LF $ - 76 8-23 Curb Paint 0 LF $ 0.50 _ $ - 77 8-27 Pedestrian Hand Railing 300 LF $ 160.00 $ 48,000.00 78 8-62 Illumination System Complete 1 LS $ 65,000.00 $ 65,000.00 Subtotal $ 1,788,084.90 Allowance for Miscellaneous Items 1 LS 10% $ 178,800.00 Subtotal $ 1,966,884.90 Contingency - 15% $ 295,030.00 Subtotal Schedule A $ 2,261,914.90 3/4/2013 SCHEDULE A 30% Tukwila 42nd Engineers Estimate - Combined.xlsx City of Tukwila - 40th - 42nd Ave South - Phase III Schedule B - Gilliam Creek Culvert Replacement 30% Cost Estimate Item No. Sec. No. Item Description Quantity Unit Unit Price Total Price 1 1-09 Mobilization 1 LS $ 45,167.80 $ 45,167.80 2 1-04 MINOR CHANGES 1 LS $ 20,000.00 $ 20,000.00 3 2-01 REMOVE/ABANDON EXISITNG 36" DIAM. PIPE 94 LF $ 37.00 $ 3,478.00 4 5 7-02 7-02 16' SPAN MULTI -PLATE OPEN BTM ARCH (8'-4" RISE) CIP PIPE ARCH FOUNDATION / FTGS 135 44 LF CY $ 490.00 $ 457.50 $ 66,150.00 $ 20,130.00 6 7-02 ROCKERY HEADWALL 2 LS $ 15,000.00 $ 30,000.00 7 7-02 TRENCH SAFETY SYSTEMS 2640 SF $ 3.00 $ 7,920.00 8 7-02 UTILITY RELOCATIONS AND TEMPORARY SUPPORT 1 LS $ 50,000.00 $ 50,000.00 9 7-02 TEMPORARY BYPASS 1 LS $ 25,000.00 $ 25,000.00 10 7-02 STREAMBED COBBLES AND BOULDERS 365 CY $ 100.00 $ 36,500.00 11 2-03 ROADWAY EXCAVATION INCL. HAUL 3600 CY $ 25.00 $ 90,000.00 12 2-03 IMPORTED GRAVEL BACKFILL 1550 CY $ 30.00 $ 46,500.00 13 2-01 CLEARING AND GRUBBING 1 LS $ 6,000.00 $ 6,000.00 14 8-02 LANDSCAPE RESTORATION 1 LS $ 20,000.00 $ 20,000.00 15 8-01 TESC & SWPPP COMPLIANCE 1 LS $ 20,000.00 $ 20,000.00 16 2-02 DEWATERING 1 LS $ 10,000.00 $ 10,000.00 Subtotal $ 496,845.80 Allowance for Miscellaneous Items 1 LS 10% $ 49,700.00 Subtotal $ 546,545.80 Contingency 15% $ 81,981.87 Subtotal Schedule B $ 628,527.67 3/4/2013 SCHEDULE B 30% Tukwila 42nd Engineers Estimate - Combined.xlsx 0 / 1. e/q_ COMP TE APPLICATION CHECKLIST The materials listed below must be submitted with your application unless specifically waived in writing by the Public Works Department and the Department of Community Development. Please contact each Department if you feel that certain items are not applicable to your project and should be waived. Application review will not begin until it is determined to be complete. ADDITIONAL MATERIALS MAY BE REQUIRED. The initial application materials allow project review to begin and vest the applicant's rights. However, the City may require additional information as needed to establish consistency with development standards. RECEIVED City staff are available to answer questions about application materials at 206-431-3670 (Department of Co 0 un�ty� Development) and 206-433-0179 (Department of Public Works). JUL l�j Check items submitted with application Information Required. May be waived in unusual cases, upon approval of both1 `p sratd Planning APPLICATION MATERIALS: ✓` 1. Application Checklist (1 copy) indicating items submitted with application. ✓ 2. Completed ESA Screening Checklist, SEPA Environmental Checklist and drawings (5 copies). ✓ 3. One set of all plans reduced to 8 1/2" x 11" or 11" x 17". 7 4. Application Fee: See Land Use Fee Schedule. Gj /4/03 03 , /000, /07 i' Ni/iNt 5. Underlying permit application that triggers SEPA review. /0_3,98,5% ee- QO ,Lig. c O PUBLIC NOTICE MATERIALS: 6. Payment of notice board fee (see Land Use Fee Schedule) to FastSigns Tukwila OR provide a 4' x 4' public notice board on site within 14 days of the Department determining that a complete application has been received (see Public Notice Sign Specifications Handout). 7. Pay the fee as established by the Land Use Fee Schedule for generating mailing labels; OR provide an excel spreadsheet of mailing labels for all property owners and tenants (residents and businesses) within 500 feet of the subject property. Each unit in multiple family buildings e.g. apartments, condos, trailer parks --must be included. Once your project is assigned to a planner, you will be required to provide an electronic copy of the mailing label spreadsheet in the following format: Name, Street Address, City St Zip, with each of these fields as an individual column: Name Street Address City, St, Zip Mr. Smith 1234 Park Ave S Tukwila WA 98188 PLEASE NOTE: Regardless of whether you pay the City to generate the mailing labels or you provide them, there is an additional fee for postage and material as listed under Public Notice Mailing Fee on the Land Use Fee Schedule. Payment of this fee is due prior to issuance of the decision and you will receive a separate bill for this fee. 8. If providing own labels, include King County Assessor's map(s) which shows the location of each property within 500 ft. of the subject lot. \\Deptstore\Dcd Common$\Applications-Handouts, Land Use\2014 WEBS1TE\March 2014 (Corrected Fast Signs Fee)\LAND USE-WORD-Docx\SEPA Environmental Review Application- Jan2011.Docx • Check items submitted with application Information Required. May be waived in unusual cases, upon approval of both Public Works and Planning PROJECT DESCRIPTION AND ANALYSIS: ✓ 9. Vicinity Map with site location. V 10. Provide four (4) copies of any sensitive area studies such as wetland or geotechnical reports if needed per Tukwila's Sensitive Areas Ordinance (TMC 18.45). See the Geotechnical Report Guidelines and Sensitive Area Special Study Guidelines for additional information. No 11. Any drawings needed to describe the proposal other than those submitted with the underlying permit. Maximum size 24" x 36". \\Deptstore\Dcd Common$\Applications-Handouts, Land Use\2014 WEBSITE\March 2014 (Corrected Fast Signs Fee)\LAND USE-WORD-Docx\SEPA Environmental Review Application- Jan2011.Docx Zot)U-e OCL kV440 rYik 00 NAL k PI° CY- hASIA,Vt ? t � CITY OF TUKWILA Department of Community Development 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 FAX: (206) 431-3665 E-mail: plannineb,TukwilaWA.gov SEPA ENVIRONMENTAL REVIEW APPLICATION FOR STAFF USE ONLY Permits Plus TYPE: P-SEPA Planner: File Number: 6, � l /) `�--pz___ Application Complete Date: Project File Number: `�� /.AD Application Incomplete Date: / Other File Numbers: NAME OF PROJECT/DEVELOPMENT: 40th -42nd Avenue S Phase III and Gilliam Creek Culvert Replacement Project LOCATION OF PROJECT/DEVELOPMENT: Give street address or, if vacant, indicate lot(s), block and subdivision, access street, and nearest intersection. 'FCEIVED 42nd Avenue S from Southcenter Boulevard to S 160th Street. JUL 07 201 LIST ALL TAX LOT NUMBERS (this information may be found on your tax statement). n/a (;c,;�:... , t obVLLUI'MLNT DEVELOPMENT COORDINATOR : The individual who: • has decision making authority on behalf of the owner/applicant in meetings with City staff, • has full responsibility for identifying and satisfying all relevant and sometimes overlapping development standards, and • is the primary contact with the City to whom all notices and reports will be sent. Name: Cyndy Knighton Address: 6300 Southcenter Blvd, Suite 100, Tukwila, WA 98188 Phone: (206) 431-2450 FAX: E-mail: Cyndy.Knighton@TukwilaWA.gov Signature: (-1,4 Date: —7/7/144 \\Deptstore\Dcd Common$\Applications-Handouts, Land Use\2014 WEBSITE\March 2014 (Corrected Fast Signs Fee)\LAND USE-WORD-Docx\SEPA Environmental Review Application- Jan2011.Docx CITY OF TUKWILA Department of Community Development 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 FAX: (206) 431-3665 E-mail: planning(ddTukwilaTVA. gov AFFIDAVIT OF OWNERSHIP AND HOLD HARMLESS PERMISSION TO ENTER PROPERTY STATE OF WASHINGTON COUNTY OF KING The undersigned being duly sworn and upon oath states as follows: 1. I am the current owner of the property which is the subject of this application. 2. All statements contained in the applications have been prepared by me or my agents and are true and correct to the best of my knowledge. 3. The application is being submitted with my knowledge and consent. 4. Owner grants the City, its employees, agents, engineers, contractors or other representatives the right to enter upon Owner's real property, located at �b-a k.jc. c5 for the purpose of application review, for the limited time necessary to complete that purpose. 5. Owner agrees to hold the City harmless for any loss or damage to persons or property occurring on the private property during the City's entry upon the property, unless the loss or damage is the result of the sole negligence of the City. 6. Non -responsiveness to a City information request for ninety (90) or more days, shall be cause to cancel the application(s) without refund of fees. EXECUTED at JUL ©?201k r. .1\ At rH 1 On this day personally appeared before me (city), ��r O (state), on n(lc, , 20 I i (id K vi l/i -(-C1-) (Print Name) (02-50C_) � P���i� � d ` lC (Address) 1-0 K:VV (C'� L� C' �'1 ` re —lac 13( 2 LIS -0 executed the foregoing instrument and acknowledged that lC purposes mentioned therein. SUBSCRIBED AND SWORN TO BEFORE ME ON THIS LAURIE A. WERLE NOTARY PUBLIC STATE OF WASHINGTON COMMISSION EXPIRES MAY 29, 2018 (Phone Number) (Sigr.ture) w same me known to be the individual who /she g as his/her voluntary act and deed for the uses and lf si ed the It -IN DAY OF .) p 20 / C( itc,Ll((/-04(//.-e ,'it tial( N6T! RY PUBLIC in a d fo the State of Washington residing at (v I �C My Commission expires on .,Deptstore Dcd ConunonS\Applications-Handouts, Land Use,2014 WEBSITE\March 2014 (Corrected Fast Signs Fee)\LAND USE-WORD-Docx SEPA Environmental Review Application- Jan201I.Docx i i rti DESIGN MEMORANDUM FOR GILLIAM CREEK Detention and Water Quality Enhancements October, 1994 Prepared for: CITY OF TUKWILA Department of Public Works 6200 Southcenter Boulevard Tukwila, Washington 98188 c Prepared by: Perteet Engineering, Inc. Civil and Transportation Consultants 2828 Colby Avenue, Suite 410, Everett, WA 98201 (206) 252-7233 / FAX (206) 339-6018 RECEIVED OCT 19 1994 TUKWILA PUBLIC WORKS 1 DESIGN MEMORANDUM FOR GILLIAM CREEK Detention and Water Quality Enhancements October, 1994 Prepared for: CITY OF TUKWILA Department of Public Works 6200 Southcenter Boulevard Tukwila, Washington 98188 IEXPIRES: 9/30/ q6 Prepared by: Perteet Engineering, Inc. Civil and Transportation Consultants 2828 Colby Avenue, Suite 410, Everett, WA 98201 (206) 252-7233 / FAX (206) 339-6018 CITY OF TUKWILA GILLIAM CREEK Detention and Water Quality Enhancements Table of Contents Section Page Introduction 1 Conclusions and Recommendations 1 Summary of Existing Conditions 4 Design Criteria 6 Pond Rehabilitation Alternatives 8 Pond Bypass 11 Fish Habitat 12 Additional Issues 13 Appendix A - Fisheries and Stream Habitat Evaluation GILLIAM CREEK DESIGN MEMORANDUM INTRODUCTION The purpose of this design report is to identify potential improvements within the stream corridor of Gilliam Creek which will enhance fish habitat while providing additional storm water detention and enhance water quality for the overall drainage basin. This study concentrates on potential improvements to the south fork (reconstruction of existing in -stream ponds), but also includes fish habitat analysis for the north fork. Specific items for study include: • rehabilitation of the existing ponds along the south fork • detention enhancement along the south fork to offset widening of 42nd Avenue • water quality enhancement along the south fork • pond bypass feasibility along the south fork • fish habitat enhancement along both the south and north forks • additional detention/water quality opportunities in the south fork drainage basin upstream of the proposed ponds • floodwater bypass of critical conveyance elements of the existing system • maintenance and pedestrian access along the south fork The study area lies along the north and south forks of Gilliam Creek in the vicinity of 42nd Avenue South (see Vicinity Map, Figure 1). The reach of the south fork extends from the confluence of the two streams in the vicinity of South 152nd Street and 44th Avenue South upstream southwesterly approximately 0.3 miles to the point where the open channel ends at a 60" CMP culvert at the toe of SR 518 fill slope. The north fork of Gilliam Creek under study begins at the confluence of the two forks and extends northwesterly approximately 0.2 miles to the intersection of 42nd Avenue South and South 148th Street. High flows during peak storm events and intensive development (without water quality or detention facilities) of the headwaters have resulted in poor water quality, erosion of the roadways and stream banks and siltation within the stream corridor. Improvements to be constructed within the stream corridor are intended to reduce the peak flows where possible while providing increased fish habitat and public benefit of the stream. CONCLUSIONS AND RECOMMENDATIONS Hydrologic analysis of the drainage basin has determined that peak runoff from the 25 year event cannot be significantly reduced by construction of in -stream facilities within the City of Tukwila. Low flows, however, contribute significantly to the pollutant loading of the downstream corridor and can be controlled and treated within the study area. This study Gilliam Creek Page 1 Design Memorandum Gilliam Creek PERTEET ENGINEERING, INC. Civil and Transportation Consultants Vicinity Map Figure 1 concentrates on providing detention and water quality improvements for Gilliam Creek within the existing stream corridor in the vicinity of 42nd Avenue South and SR 518. These improvements will more than offset the increased runoff for 42nd Avenue South due to the proposed widening of the roadway. Alternatives The three small dams or weir structures along the south fork are degraded and no longer function to control runoff or provide significant water quality enhancement for the stream. It is proposed to remove the remnants of these existing structures and pipes and replace them with new structures which will provide active detention during storm events and divert low flows to a biofiltration swale for water quality enhancement. Three alternatives were developed for the pond reconstruction and were evaluated based on the desired detention and water quality goals for the project. Design and construction of roadway improvements for 42nd Avenue South are currently in progress. Detention requirements, based on the 25 year storm event, which have as yet to be compensated for by project design amount to 7,500 cubic feet of active storage needed for future construction phases. Each of the three alternatives, identified in this report, for reconstruction of the existing ponds within the south fork of Gilliam Creek has the potential to provide detention volumes in excess of the 7,500 cubic feet required to mitigate the widening of 42nd Avenue South, with the additional volume available to attenuate existing peak flows. All three of the alternatives investigated were estimated to cost approximately $150,000 to construct. Construction of Alternative 3 consists of a concrete dam just upstream of 42nd Avenue South, a gabion dam approximately 250 feet upstream of 42nd Avenue South and rock checkdams approximately 100 feet on center through the heavily armored portion of Gilliam Creek further upstream and is recommended because it will provide the greatest fish habitat. The low check dams in the upper reaches will be constructed within the SR 518 right-of-way and will require hand maintenance. Because of their low rise, maintenance should be minimal. Bypass An option to construct a bypass pipe around the reach in which the ponds are to be constructed was investigated as a means of reducing peak flows in the rehabilitated ponds. Analysis indicates that a diversion structure would be possible at the existing outfall of the 60 inch diameter pipe under SR 518. This diversion structure would allow low flows (less than 5 cfs) to continue down the existing channel before diverting part of the flow to a new bypass pipe. A 48 inch diameter pipe is required to reduce the 25 year peak flows within the streambed by approximately 50 percent. Although construction of the bypass pipe is feasible, it would require considerable disturbance of the existing stream channel during construction of the pipeline and anchors. It would remain a surface feature within the channel during its life span. Construction of the bypass pipe and diversion structure is anticipated to cost approximately $75,000. The cost of Gilliam Creek Page 2 Design Memorandum construction would have greater long term benefits if it were invested in detention and water quality measures upstream of the proposed pond rehabilitation. City of SeaTac Although a measure of water quality improvements can be accomplished by construction of treatment facilities within the study area, the major contributions to the pollutant level come from the highly developed areas of Tukwila and within the City of SeaTac. In order to improve the water quality within the south fork of Gilliam Creek, a cooperative effort is required between the City of Tukwila and the City of SeaTac for stormwater management throughout the drainage basin. It is recommended that an active dialogue be opened to discuss construction requirements within the upper reaches to assure implementation of long term corrective stormwater practices by both communities, to provide permanent improvements along the creek. Discussions between the City of Tukwila and the City of SeaTac should address short term improvements, such as construction and maintenance of oil/water separators in the existing pipe and catch basin stormwater system, as well as long term improvements including detention and water quality facilities for all new projects or redevelopment projects in the upper reaches of the drainage basin. Street improvement projects in both jurisdictions need to provide detention (storage pipes, ditch storage, etc.) and water quality facilities (biofiltration, oil/water separators, etc.) at the source to lessen the impact on lower reaches of the stream. By the time the runoff reaches the study area, the volume is so great and the water quality is so poor that the effectiveness of detention and treatment strategies will not be completely effective until upstream conditions are improved. Existing flows within the south fork of the creek are anticipated to be approximately 250 cfs for the 25 year storm event. That same catchment area had a peak runoff of only 60 cfs for the same 25 year event under forested conditions, prior to development. The goal should be to improve the flow level and water quality as far upstream as possible to provide increased habitat for fish and wildlife so that they can be enjoyed by future generations. A method of accomplishing that goal is to impose detention performance criteria on all new developments and redevelopments within the catchment area to reduce peak discharges from each project to the pre -developed (forested) rate of discharge for the 25 year storm event. Detention and water quality best management practices should be imposed on all projects, including street rehabilitation and widening where detention can be either above or underground and ditches converted to biofiltration swales. Additional detention projects include the existing depression within the Southwicke Apartment complex and the undeveloped area just south of SR 518 referred to as Green Links. These areas require additional study to explore their full potential for detention and/or water quality enhancements. Gilliam Creek Page 3 Design Memorandum SUMMARY OF EXISTING CONDITIONS Basin Description Gilliam Creek, running primarily in an easterly direction, is a tributary to the Green River with its confluence within the City of Tukwila. The contributing basin contains approximately 1,900 acres and is bound by the Green River on the east, South 144th Street on the north, SeaTac Airport on the west, and South 166th Street on the south. The catchment basin crosses the city limits, with the lower half of the Gilliam Creek basin within the City of Tukwila and the upper reaches lying in the City of SeaTac. The portion of the drainage basin of concern for this report lies mostly upstream of 42nd Avenue South and is divided into the north and south sub -basins, with two distinct forks of Gilliam Creek. South Fork The south fork collects runoff from residential neighborhoods between 42nd Avenue South and Pacific Highway (City of Tukwila) and from commercial and industrial development between Pacific Highway and SeaTac Airport. (City of SeaTac). Channel flow begins approximately 750' west of and approximately 750' upstream from 42nd Avenue South between South 154th Street and Highway 518. The channel runs parallel to the north side of Highway 518 through a heavily armored rock corridor at the toe of the SR 518 fill slope approximately two thirds the distance from its beginning to 42nd Avenue South. The stream crosses 42nd Avenue South via a 36" concrete culvert and continues approximately 450 feet through a heavily armored rock channel to a 30" concrete culvert crossing South 154th Street. The confluence of the north and south forks of Gilliam Creek occurs immediately after the south fork crosses South 154th Street. The catchment area contributing to the south fork of Gilliam Creek is approximately 530 acres. This catchment area is divided into Subbasins A to G shown on Figure 2. Flow pattern and points of discharge for each subbasins were determined utilizing available topographic maps of the area and field observations. The predominant flow pattern for the catchment is easterly, collecting surface and subsurface flows from both north and south of the creek corridor. Subbasins A, B, C, and F flow from south to north, Subbasins D, E, and H flow north to south and Subbasin G flows from west to east at the extreme headwater of the catchment. Flow patterns for each subbasin are shown in Figure 2. The open channel of the south fork of Gilliam Creek flows eastward to the 36" culvert at 42nd Avenue South, which has a peak capacity of 110 cubic feet per second (cfs). Hydrologic analysis of the catchment, utilizing the computer modeling program WATER WORKS and existing rainfall isopluvials, indicate existing peak flows from the 25 year storm event is approximately 250 cfs at the 42nd Avenue South culvert. During periods of high flows, the excess flow is stored behind the culvert creating a pond. Gilliam Creek Page 4 Design Memorandum Gilliam Creek PERTEET �I ENGINEERING, INC. Civil and Transportation Consultants Sub -Basins & Flow Paths Figure 2 Flow Tote data indicates continuous flow in the channel of approximately 0.25 cfs, but have no record flows greater that 21.4 cfs. This information does not include peak storm events, which is the basis of the hydraulic modeling. There are remnants of three structures located within the south fork of Gilliam Creek. Structures 1, 2, and 3 are located approximately 400', 320', and 80' upstream of 42nd Avenue South. Structure 1 was a rock dam, which has since been dismantled. Rocks used for this dam have moved from their primary position, and no longer functions as a dam. Structure 2 is a concrete wall approximately 3 feet in height which appears to have functioned as a low level dam. This concrete dam extends across half the width of the creek and is missing the south bottom corner. It has virtually no effect on the creek during low flows at this time. The last structure is a more substantial 4' high by 20' long concrete dam (Structure 3) and has a broken 36" concrete chute plus a 24" concrete pipe to discharge downstream. A permanent pond exists upstream of the dam with low flows discharging continuously through the 36" chute. The 24" concrete pipe is not functioning at this time and appears to be buried at the upstream end. High flows appear to overtop the structure but remain within the defined channel. The entire concrete dam is broken and damaged beyond repair, thus removal of the structure and pipe is recommended. The locations of the existing structures are shown in Figure 3. Historically, all of the ponds were used for fish rearing by local residents. According to the Washington State Department of Fish and Wildlife, the ponds were permitted for both release fish and personal use. North Fork The north fork collects runoff from residential neighborhoods between 42nd Avenue South and Pacific Highway and from commercial developments along Pacific Highway. The north fork also includes residential neighborhoods in its uppermost headwaters west of Pacific Highway. The uppermost reaches of the north fork have a combination of open ditches and closed conveyance systems. Through the highly developed commercial areas on Pacific Highway the flow path has been completely enclosed with catch basins and piping. The lower reach of the drainage way (between 42nd Avenue South and the confluence with the south fork) is heavily armored with rock in an attempt to protect the channel from the severe downcutting due to increased flows from development and piping of the runoff over the years. The defined catchment area for the north fork of Gilliam Creek is approximately 96 acres. Hydrologic analysis of the catchment indicate a peak flow of 30 cfs for the 25 year storm event. Gilliam Creek Page 5 Design Memorandum •1 LT) U 0 U 3 N re w oa 1 • ly ,fie ,� It; { , , ,,b,-. 'Itt1 ; 1 V ,, z o 1 3\ 1 , IL"U ; , ., ,+ 1 \11 1 , i i,' w w , ,1 `' c ; a i• 1 1; cc 1 , 1 \1 ; % m a i 1 ','; 1' 1 ,; moI 1 1 1; ' ,; a7' in � 1, 1 • ;1 �� ,, \ 11 �, , , , 1 , 1�• +; i 1' i , • ` i 1 1 , C3 i1 , 1 1 „ ,1 a. �M I 1 1 1 1 t+ UN i ' 1 + , , 1 1 1 1 , , 1 } rw 1 1 + 1 1 1 1 1 1 1 1_1 1 , 1 \ 1 ' 1 , 111 1 , 1 N E N X w -J a 0 U SCALE: 1" - 60' CONC. WALL 1 3, , 1 1 1 i 10 1 1 ,1 1 1 1 ' Ii 1 1 , 11 1 1 , i ''i 1 1 1 1 1 i ii 0 i, , t 31') i 1 (\11 1 1 CL l `\ 1 1 1 : • 1 1111 tow 1 11 1 C•N Z N 0 in N .F N W ti DESIGN CRITERIA The purpose of this design report is to identify potential improvements within the stream corridors of Gilliam Creek which will enhance fish habitat while providing additional storm water detention and enhance water quality for the overall drainage basin. Detention The proposed alternative is to provide adequate detention volume to mitigate additional peak flows from the widening of 42nd Avenue South. Additional detention achieved beyond that required for 42nd will benefit the overall basin by reducing peak discharge to downstream conveyance elements. Water Quality Construction of a biofiltration swale or wet cell to polish the stormwater and improve water quality before discharging into the Green River is to be an integral part of the proposed alternative. Fish Habitat This criteria is for the proposed alternative to provide improved fish habitat within the south fork of Gilliam Creek for either resident trout or salmonid species. This habitat is to be compatible with the proposed planting of fish by Thorndyke Elementary School to release juvenile fish within the constructed ponds. Additionally, this report is to identify potential future improvements to the north fork of Gilliam Creek which could provide sustained fish populations within this reach of stream. Access The constructed facility will require periodic maintenance and the stream will provide recreational and educational opportunities for the community. Therefore, an access road is required from 42nd Avenue South to the ponds for maintenance and a pedestrian path is desired to connect the ponds to 48th Lane South, with a proposed link to future paths and trails created by the City of Tukwila. Bypass at South 154th Street A part of this design report is to identify_ a potential bypass alternative which will reduce the peak flows at the confluence of the north and south forks of Gilliam Creek at the Valley View Apartments. This bypass is intended to reduce the ponding depths above an existing 1,000 foot long, 30" diameter concrete culvert pipe. The exact routing and condition of the pipe is questionable since available records are sketchy. Research of King County records by City of Tukwila Public Works staff indicate that the pipe was installed on private property and Gilliam Creek Page 6 Design Memorandum remains under private ownership. Failure of this existing 30" pipe could potentially cause significant property damage. It is anticipated that such a bypass would divert peak flows from the south fork immediately upstream of South 154th Street, thus reducing peak flows entering the depression at the confluence. This bypass would also lessen the potential for overtopping South 154th Street during extreme storm events. Additional Detention This report is to identify other areas, within the City of Tukwila and upstream of the three old ponds on the south fork of Gilliam Creek, which may provide opportunities for additional detention or water quality enhancements. 42nd Avenue South Roadway Improvements Phase 1 Proposed improvements to 42nd Avenue South by Phase 1 are from South 139th Street to South 154th Street. The improvements which are to occur within the Gilliam Creek catchment are from South 144th Street to South 154th Street. The improvements are for widening the existing roadway varying from 9 to 21 feet with new pavement and addition of sidewalks on both sides of the roadway. Hydrograph analysis of the catchment using the computer modeling program WATER WORKS indicates the existing runoff from contributing subbasins for the 25 year storm is 24.66 cfs. The new additional impervious area is 1.23 acres and will contribute an additional 0.84 cfs of runoff for the 25 year storm. The 5,200 cubic foot detention volume required for Phase 1 construction is being satisfied by construction of a new open detention pond. The pond includes a biofiltration swale and created wetlands for water quality enhancement. Phase 2 Phase 2 construction lies north of the Gilliam Creek basin entirely and will not impact either the south or north fork of the stream. Phase 3 Phase 3 improvements to 42nd Avenue South will extend from South 154th Street to South 160th Street. The contributing drainage basin for this phase are Subbasins A, B, C, and D shown in Figure 2. The flow pattern for Subbasins A, B, and C are to the north, and runoffs for Subbasin,D flow to the south.' The total runoffs from these Subbasins for the 25 year storm is 26.56 cfs. The new impervious -area for this phase is 1.52 acres. This produces an additional runoff of 0.99 cfs for the 25 year storm and requires a design volume of 7,500 CF for detention. Gilliam Creek Page 7 Design Memorandum POND REHABILITATION ALTERNATIVES One of the primary purposes of this report is to identify potential improvements to the south fork of Gilliam Creek which would provide water quality enhancements for the entire basin and detention opportunities to offset runoff impacts from improvements to 42nd Avenue South. In addition to the water quality and detention improvements, the project is to provide habitat that would reestablish instream fisheries to the extent feasible within the limited control of the City of Tukwila. Three alternatives were developed to increase the water quality and detention capacity of Gilliam Creek, each of these alternatives propose to minimize excavation on the south side of the creek to protect the existing shading vegetation from disturbance. The north side of the creek is a steep slope with existing structures immediately at the top of slope. No excavation is proposed at the toe of the north slope to assure stability of those slopes. A majority of the peak flow within the stream channel as well as the pollutant loading of the runoff water originates outside the City of Tukwila in the headwaters of the basin near SeaTac Airport and along Pacific Highway. Improvements to the existing stream flow and water quality are constrained to the open channel upstream of 42nd Avenue South along the north toe of the SR 518 fill slope. Access to the site is limited by the steep sideslopes on either side of the creek upstream of 42nd Avenue South. It is not practical to excavate the toe of either the north slope or the toe of the SR 518 fill to construct an access road for slope stability reasons. Construction of additional fill would cover the existing streambed in the narrowest sections and construction of a wall would require removal of trees and increase project costs. Each of the alternatives can provide vehicular access for maintenance of the detention facilities from 42nd to the two ponds downstream of the SR 518 right-of-way. Pedestrian access to the remaining stream corridor between 42nd Avenue South and 48th Lane South is proposed with each of the alternatives. Maintenance of any facilities within the rock armored channel in the SR 518 right-of-way would be via the pedestrian path, and thus repairs would be limited to the use of hand tools. Alternative 1 Modification to the south fork of Gilliam Creek proposed with Alternative 1 (see Figure 4) includes replacement of the existing concrete dam structure just upstream of 42nd Avenue South, one new earth dam structure approximately 250 feet upstream of 42nd Avenue South, two gabion rock dams 350 and 400 feet upstream of 42nd and a new overflow structure on the upstream end of the existing 36" culvert under 42nd Avenue South. These new dam structures will include flow control devices for low flows and designed spillways to bypass high flows, providing two permanent ponds (two to four feet deep) and additional two to four foot detention above the permanent pools. The gabion rock dams will be low level structures which will provide minimal pooling, but will provide sediment traps to extend the useful life of the larger ponds being constructed downstream. A biofiltration swale will also be constructed, along the southeast side of the easternmost pond, to provide additional water quality enhancement for the overall basin, prior to discharge Gilliam Creek Page 8 Design Memorandum .R 0 z O U 0 0 UUIa] z F ' \ 1-.1 V + \ ' `I t t., ' 1 1� 1 1 (1) i t \ i' 1 t: I + 1: 1;1 �1; i ' 1: 1 ; ' \ 11\ 1 ' \ 1 d `t 1 t j E.i 1 I'd o i N 1 ''t ', , " CO CL O% w W 1 ti 1? 11 '1 1 aM 1 1 t 1 it* UN �0 i,\1111 Nw Cr (I) 1 1 \ 1 L t1 11 \ I , 't \ 1 1 1 t 1 0 1 t 1 1 , `+ It + i , , i ' 1 + 1 I t I I I t 1 I i 11:;1 t 1 1 1 o in t 1 CL a 1 1 1 \'t ', i UN t \ { 1 , 1 So w ? ! It ' I 1 ti d aT /7 downstream. The control structure in the earth dam will divert low flows from the stream through the biofiltration swale for polishing of the storm water before entering Pond 2. High flows will bypass the biofiltration swale and discharge directly into Pond 2, thus protecting the swale from erosion. The available storage volume for this alternative is approximately 36,000 CF with an above average water quality treatment system. The access road for maintenance is proposed to enter the site at the existing driveway location and due to steep sideslopes and limited area, it will extend only as far as the earth dam. Maintenance of the gabion rock dams will be limited to hand tools as the only practical access is by foot. A pedestrian path will extend from the end of the maintenance road along the north side of the creek, connecting 42nd Avenue South with 48th Lane South. The pedestrian path will require a low level stream crossing, arch pipe or small pedestrian bridge over the northerly branch of the south fork, approximately 120 feet downstream of 48th Lane South. This branch is the stormwater outfall from the Southwicke apartment complex and thus carries high flows only during storm events, making an at -grade crossing feasible for the pedestrian path. Alternative 2 The south fork of Gilliam Creek is also proposed to be modified by Alternative 2 (see Figure 5). Those modifications include replacement of the existing concrete dam structure just upstream of 42nd Avenue South and a new gabion dam structure approximately 250 feet upstream of 42nd Avenue South. These new dam structures will also include flow control devices for low flows and designed spillways to bypass high flows, providing two permanent ponds (two to four feet deep) and additional two to four foot detention above the permanent pools. A biofiltration swale will be constructed downstream of Pond 1 and along the southeast side of Pond 2, with low flows being diverted from Pond 1 through the swale to polish the runoff and improve overall water quality for the entire basin. High flows will bypass the swale and will go directly into Pond 2, via a gabion spillway. Minor regrading will be required on the slopes to the east of Pond 1 to increase detention. Alternative 2 available storage volume is approximately 37,000 CF with an above average water quality treatment system, especially during low flows where most of the runoff will flow through the biofiltration swale. The access road for maintenance is proposed to enter the site at the existing driveway location and due to steep sideslopes and limited area, it will extend only as far as the gabion dam and Pond 1. The same pedestrian path identified in Alternative 1 will extend from the end of the maintenance road along the north side of the creek, connecting 42nd Avenue South with 48th Lane South, requiring the low level stream crossing or small pedestrian bridge approximately 120 feet downstream of 48th Lane South. Gilliam Creek Page 9 Design Memorandum 0 �I/� \,'�tr,' d(4'/ � it `�Z 11I i �, CI 1 Atat 'Ili \1,1 . ,,` O 00 0 0 Q . , �+I 1 \ R , O 1:CC 1 VI i+ N 1 1 W I ' •. , OW 1 ' �; 1-R Q i ' \ + I ' , W5 i ' 1c ' 111 W 1 ' ,' 11"ii �, %R z i 01 11 UCC ' W \ W +- l , , 1 1 LK 1 I o a \\\\ re j -I i 1re In C3 In CI mw aZ N0 N Q U 0. cc ct as � .� Z0 In N N W 1- 116 fA 5 Alternative 3 Construction of Alternative 3 (see Figure 6) would be similar to Alternative 2 with the addition of rock checkdams approximately 100 feet on center through the heavily armored portion of Gilliam Creek upstream of 42nd. There would be three of these two foot checkdams within the reach of the stream, which would create small pools during low flows. An advantage of this alternative is providing additional sediment traps along the stream corridor that is upstream of the permanent pools. This will create improved habitat for the planted fish, by reducing the sediment load in the larger ponds. Negative aspects of this alternative include the lack of vehicular access to the check dams for maintenance and the possible future widening SR -518 which would remove the check dams. A matrix analysis of the proposed alternatives was prepared to evaluate the effectiveness of the potential solutions. The results of that analysis are as follows: Gilliam Creek Potential Pond Rehabilitation Rating Matrix Requirem 1. Detention 4 5 5 Water Quality 4 4 4 Fish Habitat 2 2 3 Access Road / Maintenance 2 3 2 Right -of -Way 2 2 2 Constructibility 2 3 3 Cost 3 3 3 Geotechnical Report * * Total 19 22 22 Rank: 0 to 5, where 0 = No Benefits 5 = Meet All Goals * Reconstruction of ponds within the stream will increase ponding depths along the toe of slope. A geotechnical slope analysis should be conducted prior to final design regardless of the alternative selected. This geotechnical analysis is beyond the existing scope of services. Gilliam Creek Page 10 Design Memorandum & 0.1 5 -...\\ 1 t • 1i , 1 1'. OW it 1 ` 1., 1 1 t 11 11': ' 1 � 1 1 . , WO z t t ' tri �' t 1 i1,t1 ,•••`1 � 1 1 1 ' J U N *le � FO i t, � ,t1 li V. , ,t t1 Ow 5 1 �\ 1 1 1 It t i �� 1 1 �, 1 1 !1, ti 1 0 NLi, LI Olt:W.4# 'U N K N 1 '1 11 i '1 1 5 1\ '� 1 \ 1 I t 1 ,\�\ `, 1 tt t' 1 1 , 1 1 11`��`` 1 1 1 1 '\=` `, (,�� ; t11 111 ; 11111 11, it t ; y t 11 t , I t1t t i 1 i 1 ' 1 1 1 t t 1 1 1 I 1 1 I � •i EJ i0 wee Based on the above analysis, Alternatives 2 and 3 appear to be equally suited to meet the majority of the project goals. Alternative 3 is recommended for construction as it provides the greatest fish habitat upon completion, although it requires additional maintenance. POND BYPASS Due to the high flows anticipated for peak events, concern has been raised for success of any new facilities to maintain fish within the stream corridor. A diversion structure and bypass pipe system was evaluated to determine its feasibility, (see Figure 7). It was determined that a diversion structure would be feasible if constructed at the head of the open channel portion of the stream. Two major concerns exist for construction of the diversion structure; maintenance accessibility and constructibility. Both of those concerns are alleviated if the structure is located at the outfall of the existing 60 inch diameter pipe under SR 518. The structure would be located upstream of the heavy vegetation and thus not be subject to as great a plugging potential. The site can be accessed for construction and maintenance through the SR 518 right-of-way, if a gate is provided at the end of 40th Lane South. The bypass pipe was evaluated to determine its potential location and configuration. It remains highly desirable that disturbance of the existing stream channel be kept to an absolute minimum, therefore, construction of a separate channel or undergrounding a pipe were not considered desirable alternatives since both options would require extensive excavation and regrading. The steep and questionably stable north slope of the channel precluded placement of the bypass in that area. Given the site constraints, it was determined that the best alternative would be a pipeline which could be laid along the existing stream (without destroying the channel). A butt fused high density polyethylene pipe fulfills these requirements. This pipe could be constructed from the upstream end of the channel with each section being fused to the next to form a continuous pipe over the entire 725 foot length required. The pipe would be laid on the surface of the ground from the diversion structure to the constructed ponds. From the upper pond, the pipe would be buried under the access road and have an outfall back into the stream, just west of 42nd Avenue South. Preliminary design of the bypass is for a 48 inch diameter pipe to carry the high level flows. To assure that continuous flow would be to the existing stream, the diversion structure would provide a notch weir discharge to the stream channel and a 6 inch overflow sill to the bypass pipe. Overflow to the bypass would not occur until 5 cfs was exceeded in the channel. Flow Tote data indicates that normal rise and fall of the creek under normal conditions vary between 0.25 and 21.4 cfs. Five cfs appears to be a practical stream flow prior to overflow to the bypass pipe. Under peak flow conditions the bypass pipe will have a driving head of 6 feet and convey approximately 130 cfs, greatly reducing the flows and thus erosion within the south fork stream channel as far as 42nd Avenue South. However, a large energy dissipater Gilliam Creek Page 11 Design Memorandum s 1i I/l//Ii,.Ct. cc W z O U ti I 1 1 ', 1 y11` / \�\`‘1 111; 00 1 1, -4'08, , t. 1 ` `I i;1 } 1 1; i 1 1, 1 •••... i; 1 1 ' { \1 1 1 1 1 1 \ , '` 1 \ 1; 11 1 ; 1 ; 1 \ 1 1 ; ' ;1 \ 1 i 1 , T 1 I \ ., 1 1 11 `, 1 '` 1 \ 1 1 \111 11 1 1 1 1 'i ci t 1 1 1 , 1 i 1 1 1 1 1 1 1 11 \ 11 1 1 I ' 1 1 1\ i 1 ; 14 1 1 1 i 1 \ \ 1 \ 1 1 1 1 1 1 4 1 1, 1 1 1 1 1 11 10 1 1 1 \ 1 1 1 1 1 o 0o • • 1" • .0 z O U z 0 N U wt O Fce0 a ma 03 0 a' N CO I 03 &Rigfiagionmmu will need to be constructed at the end of the pipeline to reduce flow velocity at the pipe outfall if the bypass is constructed. Although a surface pipeline could be constructed, it would lie within the streambed and thus interfere with naturally occurring channel flow. Streamflows below 42nd Avenue South would not be positively impacted by construction of the pond bypass pipeline since peak flows through the pipeline would have a shorter travel time. This concept returns to the old practice of passing the runoff downstream as quickly as possible rather than detain it at its source. The cost of construction would have greater long term benefits if it were invested in detention and water quality measures upstream of the proposed pond rehabilitation. FISH HABITAT South Fork Limited fish habitat in the form of gravels, pools, and riffles exist within the south fork of Gilliam Creek. The low count of invertebrates, however, indicate a lack of food source to sustain a resident fish population. This lack of food source is indicative of the pollutant levels previously mentioned. Additionally, major hurdles for establishing migratory fish habitat exist due to the 1000 foot long 30" pipe below the confluence of the north and south fork of the creek, as well as upstream blockage by culverts under South 154th Street and under 42nd Avenue South (see report by Adolfson Associates, Inc., Appendix A). The major concerns for constructing new ponds as resident fish habitat include increased water temperatures due to the ponding. Phil Schnieder, Washington Department of Fisheries, indicated a concern that clearing and/or grading to construct the ponds will elevate the water temperature prior to discharge downstream and thus affect downstream habitat. The developed alternatives have minimised excavation and vegetation removal to maintain shading of the stream and thus avoid increased water temperatures. It was noted that the existing streambed is lacking in downed timber and logs. It is proposed that any clearing necessary for construction will save a number of trees which are removed and place them within the stream for habitat improvement. These tree stumps and logs would be securely anchored in the banks to assure stability during peak flows. The proposal does not provide for fish passage upstream through the proposed structures, since migratory fish will not be able to access this reach of the stream because of the downstream obstacles outlined previously. With proper design, this reach of the stream will support a resident fish population. However, there is a real concern that during peak runoff events fish populations would be washed_downstream and be unable to return when the flow subsides. Two methods have been explored to lessen the impact of resident fish during those peak flow events; the pond bypass pipe or creation of refuge areas within the ponds. Under the latter solution, the ponds will include large boulders, constructed islands or gabion baskets placed within the deepest portions of the ponds to provide backwater eddies in which the fish can seek refuge during peak flows. Gilliam Creek Page 12 Design Memorandum North Fork Potential fish habitat within the north fork of Gilliam Creek between its confluence with the south fork and 148th Street was identified during field reconnaissance. The Phase 1 storm drainage improvements to 42nd Avenue South provide a flow control at the intersection of 42nd Avenue South with South 148th Street which will divert high flows from the channel. This measure is designed to reduce the downcutting of the channel that is currently happening with each storm event, while maintaining base flow within the creek. The result will be a continuous stream with a maximum flow of four cfs through the entire reach between 42nd Avenue South and the confluence with the south fork of the creek. Flow Tote data indicate that the stream drops below measurable levels during extended periods of the year. Spawning and rearing of migratory fish occur during the wetter periods and thus would probably survive these dry periods, however, resident fish would only survive if pools could be created that would last through the dry periods. The attached report by Adolfson Associates, Inc., in Appendix A, recommends introduction of additional woody debris and downed logs into the stream channel to enhance the pooling effect of the existing fish habitat. Design for implementation of those recommendations for the north fork is beyond the scope of this project. ADDITIONAL ISSUES Bypass at South 154th Street The confluence of the south and north forks of Gilliam Creek is located near South 152nd Street and 44th Avenue South, at which point the single stream flow is piped downslope through a 30" diameter culvert pipe for over 1,000 feet before entering the Green River. The capacity of the culvert is far less than the combined flow of 280 cfs (25 year event) for the two forks of Gilliam Creek, therefore, stormwater is impounded within the existing depression. Computer modeling of the flows and the existing depression indicate that the depth of ponding is well in excess of 40 feet for the 100 year storm event. The culvert is of questionable quality since there are no records of its design, installation, or exact location as it travels from intake to outfall. It lies beneath approximately 50 feet of fill under the parking lot of the Valley View Apartments. The south fork of the stream flows through a 36" culvert under 42nd Avenue South and travels 450' northeast to South 154th Street; it then enters an overflow structure with a 30" concrete culvert beneath South 154th Street. The peak capacity of this 30" culvert is 95 cfs, well below the peak flow of 250 cfs from the contributing basin. City of Tukwila staff have confirmed this, indicating that the south fork channel immediately upstream of South 154th Street has also experienced ponding to depths near or over the existing roadway elevation during peak Gilliam Creek Page 13 Design Memorandum storm events. It is thereby desirable to identify a potential bypass route to divert runoff from the two potential deepwater ponding areas and thus reduce the potential of failure of either impounding elements. Since there is a history of deep ponding and overtopping of the roadway at the South 154th Street culvert, it is not advisable to increase the flow through the 42nd Avenue culvert without construction of a bypass route to relieve that potential. A potential solution is to place a second overflow structure upstream of South 154th Street, approximately 20' northeast of the existing 36" culvert inlet. This structure would direct a portion of the stream flow to a new 36" pipe constructed within the south shoulder and parallel to South 154th Street. This new pipe will extend for a distance of approximately 2,100 feet to discharge into a lower reach of Gilliam Creek, just east of the 51st Avenue South overpass and to the south of South 154th Street. The flow then will then be conveyed along the existing channel and through a 48" concrete culvert crossing South 154th Street. The new 36" culvert would divert approximately 67 cfs from the south fork during peak flows, bypassing the existing culvert under South 154th Street and the 30" outfall pipe under the apartments. This will lower the ponding elevation both upstream of South 154th Street and within the depression north of 154th, by providing an additional conveyance route to the Green River. Potential Detention / Water Quality Locations A field inspection of the site was accomplished to locate potential detention and/or water quality facilities upstream of the SR 518 right-of-way. The areas surrounding the south fork of Gilliam Creek consists mainly of residential housing, with the extreme headwaters being commercial developments along Old Highway 99. This field reconnaissance identified a potential detention site within the Southwicke apartments complex, approximately 400' northwest of the open channel section of the south fork of Gilliam Creek. At this location is a trapezoidal channel approximately 150' long, 4' to 10' deep, with a 2' to 5' wide bottom, and approximate 2:1 sideslopes. The flow in the channel is from north to south and outfalls into a 36" CMP. Flow is then conveyed to outfall just east of 140th Lane South into a branch of the south fork of Gilliam Creek. Presently, the channel appears to impound approximately 8000 CF of runoff to a depth of 4 feet. The existing culvert inlet could be modified to restrict flow and raise the water level within the exiting channel This would increase the active storage of the site. If the depth were increased to 8 feet, the storage volume would increases to approximately 28,500 cf. Although detention could be increased by utilizing the existing depression, it raises a concern for safety of the resident's children. Construction of a detention facility several feet deep in the middle of an existing apartment complex may create increased liability. A potential mitigation would be to construct a fence around the facility to protect the residents. Gilliam Creek Page 14 Design Memorandum There is also an undeveloped parcel south of SR 518 in which a existing channel provides important water quality enhancements to the current runoff. It is important that this resource be protected during development of the site. The current proposal to construct a driving range on the site would be compatible with protecting the stream if proper design were employed for the development. A potential exists for providing enhancements to detention and water quality by either proper private development or acquisition and development by the City as a water resource. Further detention and/or water quality facilities can be developed by imposing performance criteria on all new developments and redevelopments within the catchment area, including street reconstruction projects. Since the goal is to reclaim the stream as a fishery, an appropriate performance criteria would be to reduce peak discharges from each project to the pre -developed (forested) rate of discharge for the 25 year storm event. Detention and water quality best management practices should be imposed on all projects, including street rehabilitation and widening where detention can be either above or underground and ditches converted to biofiltration swales. Gilliam Creek Page 15 Design Memorandum GILLIAM CREEK IMPROVEMENT ALTERNATIVES Fisheries and Stream Habitat Evaluation INTRODUCTION At the request of Perteet Engineering, Inc., Adolfson Associates, Inc. has reviewed site plans for the 42nd Avenue South Street Widening Project in the City of Tukwila with respect to the improvement of both the water quality of Gilliam Creek and its fisheries habitat. The purpose of this evaluation is to review the existing biological and stream conditions (Fisheries Habitat Assessment) in three sections of Gilliam Creek (North Fork, South Fork, and the confluence of the North and South Forks), as well as to evaluate three basin improvement alternatives within the South Fork. In addition, a discussion of water quality standards for successful fish survival is included (Appendix). SITE DESCRIPTION Gilliam Creek is located in the northeastern portion of the City of Tukwila (City Stream Numbers 22-1 and 22-4). The study site includes two reaches of Gilliam Creek near 42nd Avenue South within the City of Tukwila: 1). The 'South' Fork, a 700 -foot segment of Gilliam Creek located east and west of 42nd Ave South, which flows to the north and east, and 2) the North Fork, an approximately 500 -foot segment of Gilliam Creek, located north of South 154th Street, which flows to the southeast toward the confluence of the two streams. The third portion of the study site is the confluence of these two streams, located near South 152nd Street and 44th Ave South. Beyond this confluence, Gilliam Creek enters a culvert and is piped over 1,000 feet to its discharge point into the Green River. The basin drains 829 acres including the City of SeaTac, and the Highway 99 and Highway 518 corridors (The Valley View Drainage Study, [Gettle and Vanderburg, 1987]) EXISTING INFORMATION According to Washington Department of Fish and Wildlife (WDFW), no field data currently exists to confirm or deny the presence of salmonid species within either South Fork Gilliam or North Fork Gilliam Creeks (Schnieder, personal communication, May, 1994). Prior to urban development, however, these streams may have contained populations of Coho, Steelhead, and cutthroat trout. At present, the WDFW indicates that each of these streams provides some limited habitat of the type required to support small populations of those species. Two stream inventories (A Catalog of Washington Streams and Salmon Utilization, Volume 1: Puget Sound and 1992 Washington State Salmon and Steelhead Stock Inventory) indicate that the Duwamish/Green River and several associated tributaries support healthy populations of Chinook, Chum, Coho, and Steelhead (Williams et al., 1975; WDFW and Western Washington Treaty Indian Tribes, 1993). However, neither document specifically indicates any salmonid use of the South or North Forks of Gilliam Creek. 1 FISHERIES HABITAT ASSESSMENT General Channel Description. From field observations, it appears that the Gilliam Creek study site contains a limited quantity of stream habitat suitable for small populations of either Coho salmon or cutthroat trout. The ratio of the surface area of pools to riffles is approximately 50:50, which is considered to be within the optimum range established by the WDFW for salmonid stream habitat (Larry Fisher, personal communication, April, 1994). The streambed contains several habitat units with gravels of the size and quantity required for spawning habitat for those species. The stream flow and depth are also adequate to support spawning of both Coho salmon and cutthroat trout, as well as rearing and over -wintering of cutthroat trout. Although there is virtually no instream woody debris, the large -to -small cobbles, and streambed gravels, in conjunction with some areas of excellent vegetative cover within the study site, combine to provide an overall average habitat for a small, potential salmonid population in this urban stream. Gilliam Creek Riparian Corridor Gilliam Creek flows through a moderately steep ravine with slopes ranging from 10 to 50 percent. The slopes of this ravine are well vegetated with trees and shrubs, and provide moderate to good vegetative cover for the stream. South Fork Gilliam Creek. The South Fork, which includes sections both east and west of 42nd Avenue South, flows through a moderately steep ravine with side slopes ranging from 10 to 40 percent. Slopes of this ravine are well vegetated with young (less than 60 years old) trees and shrubs, and provide a moderate vegetative cover for the stream. Canopy vegetation consists primarily of red alder, black cottonwood, and big leaf maple. Shrub and ground cover layers are dominated by Himalayan blackberry, red elderberry, Indian plum, reed canarygrass, non-native grass, and clover species. Dense, shrubby vegetation along the creek bank appears to be promoting slope stability and protects the slope from erosion. However, the northern slope above the creek, on both sides of 42nd Avenue South, shows signs of soil creep and bank erosion. Evidence of soil creep in this area was observed in the growth form of young red alder on the slopes (i.e., curvature of the tree trunks). In addition, one small area (approximately 200 square feet) at the toe of the northern slope shows evidence of erosion and bank under -cutting just upstream of 42nd Avenue South. Erosion, bank under -cutting, and soil creep could be reduced or eliminated by the reduction of the high water flow through this reach during the winter months. West of 42nd Avenue South, portions of the bank are rip -rapped or have been disturbed by development, while other portions remain in a semi -natural forested condition. East of 42nd Avenue South, both banks are rip -rapped where the creek is culverted under South 154th Street. The rip -rap has buried the natural creek bed, with the creek only flowing over the surface of the rip -rap during high flow events. 2 The quality of the fisheries habitat differs between the two sections of the South Fork Gilliam Creek. West of 42nd Avenue South, adequate fisheries habitat exists as the vegetative cover is moderate. In addition, a moderate amount of spawning gravel is present within the area. East of 42nd Avenue South, no adequate fisheries habitat presently exists due to the placement of rip -rap over the creek. The City of Tukwila wishes to leave the riprapped portion of the channel bed intact due to the following rationale sent in a letter by Phil Fraser, Senior Engineer for the City (September, 1994): "In 1990, after annexation into the City, the creek over -scoured because the creek bedding could not hold up under high flow conditions. After the creek sank several feet in less than a year, the riverbed was reestablished to its original 1990 level with riprap. Since reestablishing the creek bed, much of the riprap has in -filled with silt and accommodates surface bows. We wish to maintain the creek at its 1990 original elevation because the materials of the over -scoured creek are unstable and will cause destabilization of adjacent properties (apartments, SR -518, and a trail/maintenance pond)." North Fork. The ravine through which the North Fork Gilliam Creek flows contains sideslopes which range from 20 to 50 percent. These are well vegetated and appear stable. The northern half of the North Fork Gilliam Creek riparian corridor is dominated by a deciduous canopy of red alder, and black cottonwood, with a few, scattered western red cedar. The thick shrub and herbaceous layers within the riparian corridor are dominated by Scouler's willow, salmonberry, red elderberry, Indian plum, reed canarygrass, and Japanese knotweed. Fisheries habitat is above average in the North Fork Gilliam Creek. The vegetative cover is good, and moderate amounts of substrate exist for spawning and rearing of fish populations. However, the area lacks woody debris. To eliminate this problem, six to eight -foot long logs, six to eight inches in diameter, can be placed across the stream with four to five feet embedded within the streambanks. This would allow the formation of backwater, damned pools or plunge pools and/or other types of fish habitat. These features would provide spawning, rearing, and/or cover for potential fish species. In the future, it is suggested that downed woody debris after winter storm event remain in the stream. Confluence of North and South Forks The confluence of North and South Forks Gilliam Creek occurs approximately 30 feet upstream from where Gilliam Creek enters the 36 -inch diameter culvert that directs it to the Green River. At the confluence, the valley bottom is flat, wide, and heavily vegetated with trees, shrubs, and herbaceous ground cover. Sideslopes range from 20 to 50 percent and are also heavily vegetated, providing good shade and habitat cover. Canopy vegetation within the confluence area is primarily red alder and big -leaf maple with Himalayan blackberry, salmonberry, red elderberry and reed canarygrass composing the dominant shrub and ground cover vegetation. The stream channel was well defined with very little evidence of bank erosion problems. 3 The overall quality of the fisheries habitat within the confluence of the North and South Forks Gilliam Creek is moderate. Flo -Tote data available to the City indicates the North Fork stream flow occasionally drops below measurable levels. While this may preclude year-round habitat for salmonids, the data also indicates that water Clow is adequate throughout the year near the confluence and during spawning season. Thus, the potential exists for a small resident trout population to utilize only a limited portion of the North Fork as viable fish habitat. If the establishment of a fish population is the desired goal the North Fork needs pools that are deep enough to allow the fish to survive the dry spells. Vegetative cover exists for fisheries habitat and moderate amounts of spawning gravel were found within the overall area. EVALUATION OF BASIN IMPROVEMENT ALTERNATIVES This evaluation discusses three alternative actions proposed as watershed basin improvements, and designed as a part of the mitigation for the 42nd Avenue South Street Widening Project. All three alternatives intend to improve the portion of the South Fork Gilliam Creek located west of 42nd Avenue South Street by constructing two to three detention pools within the existing stream channel. The intended purpose of constructing the in -stream detention pools is to enhance stream and fisheries habitat, improve downstream water quality, and provide additional surface water storage to flood control flows during seasonal high flow events less than the 100 -year storm. Alternative 1 Under Alternative 1, the following construction activities will occur. An existing dam structure, which is failing, will be removed from the South Fork Gilliam Creek channel. Construction of new facilities will include a concrete dam with a flood control structure, an earthen dam, a wet cell, two gabion rock check dams, excavation for an in -stream detention pond, and installation of a short gravel access road. In addition, an overflow catch basin ill be placed at the west end of the culvert that carries the creek under 42nd Street South. A gravel foot path and wooden pedestrian bridge are proposed along the north side of South Fork Gilliam Creek to provide public access. The existing dam on the site is compromised and backfilled with silt; it also poses a fish passage blockage problem. This dam will be removed. Two permanent pools will be formed, one above and one below the proposed earthen dam. A wetcell will allow for sedimentation to occur before stormwater enters the upper pool (Pond 1). The upper pool will be graded down from the south bank of the creek. The lower pool (Pond 2) will require little or no stream channel widening. A concrete darn with a flood control structure will impound surface waters for the lower pool. The new dam structures will provide pool habitat for resident fisheries, but are not designed to facilitate upstream fish passage. Any stream channel widening (i.e., regrading) will remove large shade trees that are a component of the streamside vegetation, in particular, the canopy layer of red alder and black cottonwood. Opening up the canopy over a proposed pool may cause increased stream temperatures that may adversely affect water quality within the Gilliam Creek basin. Increased water temperatures deplete oxygen supplies in the water, and can be lethal to many salmonid species when temperatures exceed 650 Fahrenheit (see Appendix). Additionally, openings within a forested 4 canopy are not easily or quickly replaced over a short time frame and stream temperature increases may occur for many years. No fish currently utilize Gilliam Creek, however a small scale version of fish ladders and/or weirs may be incorporated into the design of Alternative 1 to serve as structures that allow upstream fish passage between pools and checkdams. The potential for salmonid use in this stream would likely be limited to a small, stocked, resident trout population. WDF correspondence (Schnieder, 1994) indicates that chances of fish utilization of the stream are small. Also, this stream is piped for more than 1000 feet to its discharge site at the Green River. Therefore, the potential for any salmon species or sea run trout to enter Gilliam Creek from the Green River is severely limited. The 1000 -foot culvert acts as a fish barrier to salmonids in this creek. However, limited habitat opportunities can be found within the stream channel for small numbers of Coho, cutthroat trout, and other resident, non -game, cold -water fish species. The bigger issue of concern for fisheries habitat improvements in Gilliam Creek is water quality improvement (see Appendix for Water Quality Standards). As much as 75 to 80 percent of the surface water runoff entering Gilliam Creek comes from industrial and commercial areas within the City of SeaTac. Among these are the Highway 99 and Highway 518 corridors, and hundreds of acres of commercial and residential development. Very few invertebrates were found during the stream reconnaissance indicating a lack of prey base for a viable fisheries population. Although our insect survey was cursory, often a lack of insect populations within a steam environment can be an indicator of poor water quality. Increased vegetation plantings upstream may provide some level of improved water quality if incorporated as if in a bioswale. If the water quality improvement is significant, it may allow for an increase in insect populations as a food source for fish. In its current state, high flow events within Gilliam Creek most likely increase the sediment and turbidity of the stream. The two pools proposed under Alternative 1 will reduce sediment transport in the creek and thereby reduce water turbidity, thus improving the downstream water quality of Gilliam Creek. In addition, the wetcell will help filter storm runoff before entering the stream, again improving the downstream water quality. Alternative 2 Under Alternative 2, two new dam structures will be built, the first, a concrete dam with a flood control structure and the second, a gabion rock dam. Consequently, two pool areas will be formed (Ponds 1 and 2). No gabion check dams are proposed under Alternative 2. No wet cell is proposed for construction. Regrading for Pond 1 remains under Alternative 2. Although stram channel widening may result in forested canopy removal, Alternative 2 will not significantly decrease the amount of shade -over the proposed project site. Similar types of fish passage structures will be incorporated into the design of Alternative 2 as were described in Alternative 1. In its current state, high flow events within Gilliam Creek most likely increase the sediment and turbidity of the stream. The two pools proposed under Alternative 2 will reduce sediment 5 transport in the creek and thereby reduce water turbidity, thus improving the downstream water quality of Gilliam Creek. Alternative 3 Under Alternative 3, two pool areas are formed as described in Alternative 2. In addition, four check dam structures will be constructed in addition to the concrete dam with a flood control structure. During high flow events, four temporary pools will be formed. The pools will also contain biofiltration measures for storm runoff in the form of plantings, and construction of the pools will require little or no stream channel widening. Similar types of fish passage structures will be incorporated into the design of Alternative 3 as were described in Alternative 1 Loss of shade will not be an issue as streamside canopy cover will be left intact. As in Alternative 2, the two pools will reduce sediment transport in the creek and reduce water turbidity, which improves the downstream water quality. The four small pools will provide biofiltration measures that help to filter storm rinoffbefore entering the stream, thus providing improved downstream water quality. Summary Within the North and South Fork Gilliam Creek, there appears to be sufficient habitat for spawning of small populations of Coho and cutthroat trout and rearing habitat for cutthroat trout. However, the primary fisheries concern on both forks of Gilliam Creek appear to be two -fold: 1) the 1000 -foot culvert that prevents any salmonid fish passage into Gilliam Creek; and 2) the poor water quality insufficient to support a viable salmonid population or its required food base. Specific water quality parameters have been established by WDF for supporting aquatic life (see Appendix). Water Quality parameters should be measured before any construction begins and water quality monitoring schedules should be implemented after completion of the construction phase of the project. These procedures will ensure water quality parameters are being met to maintain a viable habitat. Until water quality standards are met that support a viable habitat, fish stocking should not occur. 6 APPENDIX: WATER QUALITY STANDARDS 7 Water Quality and Fisheries Habitat The following discussion addresses a limited but important suite of chemical water quality parameters that are important for the support of aquatic life (fish, amphibians, insects and other lesser components of aquatic ecosystem). Temperature Increased water temperatures are known to increase biological) activity, including affecting the behavior of stream organisms. The effect can act in both an acute and chronic fashion. In general, an increase of 10 0 C will roughly double the metabolic rate of cold-blooded organisms (Keeton 1967, cited in MacDonald et. al. 1991). The embryonic development of salmon and trout eggs and growth of alevins (very young fish) and gravel emergence timing are closely linked to stream temperatures during these critical life stages (see accompanying table). The optimal range for temperatures for salmonid fishes is 12 - 14 0 C, with lethal levels for adult fish seen in the range of 20 - 25 0 C. Recent work by Beschta et. al. (1987) suggests that coho and steelhead spawning may be negatively affected when temperatures exceed 10 0. C. In addition, increased temperatures have a cascade -type effect in that the rate of many chemical reactions is increased, with consequent increase in biological oxygen demand. EPA has established national criteria for coldwater fishes that states that weekly average warm season temperatures should meet site-specific or State -sanctioned requirements for successful migration, spawning, egg incubation, fry rearing, and other reproductive functions of important species. Dissolved Oxygen (DO) Oxygen is a sparingly soluble gas whose concentration in water is measured in parts per million (ppm) or mg per liter. The capacity of water to hold oxygen in solution is inversely related to its temperature, where increased water temperature lowers the dissolved oxygen at saturation, making less of it available to support aquatic life, plant photosynthesis and chemical aerobic oxidation. Thus, DO is critical to the integrity to biological stream communities and the chemical and biological processes that sustain them. The accompanying table summarizes the biological effects of differing DO concentration in streams with and without salmon and trout. Intergravel DO in part defines the suitability of spawning areas to support salmon and trout. Low DO is often associated with point source pollution, but is becoming an increasing problem is urban areas where drastic changes in summer low flow hydrology magnify the effect. Standards for DO in streams supporting salmonids state that the 1 -day minimum and a 7 -day mean DO concentration should be 8.0 and 9.5 mg liter, respectively. Less stringent standards apply where only adult salmon and trout reside. 8 Rif The concentration of free hydrogen ions in water is defined as pH, and is listed as moles per liter in the range of 1 - 14 orders of magnitude (log scale). It is the chemical activity of these free H+ ions that is of interest, and they are altered by ambient temperature changes. Increasing the temperature of pure water from 24 ° C (pH = 7.0) to 60 ° C increases the hydrogen ion activity and decreases the pH to 6.5. pH values less than seven are considered acidic, while those greater than seven are considered basic. A pH range from five to nine is not directly toxic to fish, but a decline in pH from 6.5 to 5.0 results in a progressive reduction in salmon and trout egg production and survival to hatching. From this and related data, EPA has established that pH values for streams should fall within the range of 6.5 - 9.0 to comply with Clean Water Act objectives. In addition, indirect effects of pH on stream chemical constituents can contribute to cumulative effects. Un -ionized ammonia can increase tenfold with a change in pH from 6.5 to 7.5. Similarly, metal solubility changes greatly with pH changes, a fact of considerable importance in areas where high levels of heavy metals are of concern (MacDonald et al. 1991). Toxic Metals Metals are naturally present in varying concentration in all surface waters, and many are required by fish in trace amounts for normal physiological functions. Urban runoff can increase the concentrations of dissolved metals to grossly exceed background levels, particularly where such areas are associated with roads and transportation staging areas. The accompanying table lists reported metal toxicities in soft water to various species of salmonids. Toxicity of specific metals to fish can be difficult to determine as it can vary with life stage or age, species, and duration of exposure. Cadmium concentrations in low alkalinity waters can be especially toxic to stream biota, where at high pH values, cadmium is precipitated which reduces its toxicity to fishes. Lead concentration in water should not exceed 0.03 mg/L. Lead is one of the most toxic elements known, but research into the aquatic effects is relatively recent and still somewhat limited. Copper is relatively insoluble in natural waters but becomes more soluble as pH declines, so it may be introduced into streams via both point and non -point sources of pollution that increase acidity. Copper induced mortality of fishes occurs when insoluble copper -protein compounds form on gill surfaces, which causes suffocation. Zinc is usually found in nature as a sulfide, typically associated with sulfides of lead, copper and cadmium. The toxicity of zinc to aquatic animals is modified by environmental variables, and must be in high concentrations to significantly affect aquatic populations. Hydrocarbons Standards for many hydrocarbon compounds in freshwater have been established by EPA since the mid -1980,'s. The attached table lists those standards, although many of these should be used as guidelines, as insufficient data has plagued the task of assigning reliable standards. Ideally, no input of hydrocarbons should be allowed, as aquatic systems will be affected to varying o at any concentration. Concentrations are listed as ug/L. The limited freshwater data base available for polynuclear aromatic hydrocarbons (PAH's) have been developed from short-term bioconcentration studies with two compounds and do not permit a statement concerning acute or chronic toxicity. The available data indicate that acute toxicity to saltwater toxicity is as low as 9 300 ug/L and would occur at lower concentration among species that are more sensitive than those tested. I0 PROJECT LOCATION MAYOR JIM HAGGERTON CITY COUNCIL JOE DUFFIE DENNIS ROBERTSON ALLEN EKBERG VERNA SEAL KATHY HOUGARDY DE'SEAN QUINN KATE KRULLER VICINITY MAP NOT TO SCALE CITY ADMINISTRATOR DAVID CLINE PUBLIC WORKS DIRECTOR BOB GIBERSON CITY ENGINEER ROBIN TISCHMAK PROJECT MANAGER CYNDY KNIGHTON CITY OF TUKWILA 40TH - 42ND AVENUE SOUTH - PHASE 111 CITY OF TUKWILA, WASHINGTON SEC. 22, T. 23 N, R 4 E., W.M. TIB -XXX CITY OF TUKWILA LOCATION MAP NOT TO SCALE INDEX OF DRAWINGS SHEET NUMBER DRAWING NUMBER DESCRIPTION 1 GE -1 COVER SHEET, VICINITY MAP, INDEX OF DRAWINGS 2 THRU 7 DM -1 THRU DM -6 DEMOLITION AND EROSION CONTROL PLAN 8 RS -1 TYPICAL ROADWAY SECTIONS 9 THRU 14 PV -1 THRU PV -6 PAVING PLAN AND PROFILE 15 PVD -1 PAVING AND GRADING DETAILS 16 THRU 21 DR -1 THRU DR -6 DRAINAGE AND UTILITY PLAN AND PROFILE 22 DRD-1 DRAINAGE AND UTILITY DETAILS 23 CV -1 CULVERT PLAN AND PROFILE 24 CVD -1 CULVERT DETAILS 25 THRU 30 CH -1 THRU CH -6 CHANNELIZATION, ILLUMINATION AND SIGNING PLAN 31 THRU 32 RT -1 THRU RT -2 RETAINING WALL ELEVATIONS 33 RT -3 RETAINING WALL DETAILS City of Tukwila. The "Community at the Crossroads." 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CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DEMOLITION AND EROSION CONTROL PLAN ti#5 fde no DM -4 ane revisions scale 1"=20' date 3/4/2013 1 m tD 0 z N 0 w z 1- 2 • • • • • 67+00 42ND AVE S. 7�,7,1���r�))27.0��0)746977/./A 97;69:i 4 BARRIER z#/eMr,,yxzyvgz "r7f/ezzatf..Jz,,,,gioizz/Z,Z1/77fZfi/J, /,477 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEINER-PARKS-BUILDING- date ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- date designed EWII KRW checked mien RNA pro) di, eeN Ink no CH2M H I LL® w w cr 0 -J —J 1 1 1 1 BARRIER 0 z v 0 0 w z J 2 1 - DEMO AND SITE PREPERATION NOTES: OREMOVE CEMENT CONCRETE CURB AND GUTTER OREMOVE CEMENT CONCRETE SIDEWALK O3 REMOVE EXTRUDED CURB • REMOVE AND RESET MAILBOX OREMOVE • DO NOT DISTURB • INSTALL INLET PROTECTION IN CATCH BASIN LEGEND —SAW- - HVF — 0 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DEMOLITION AND EROSION CONTROL PLAN SAW PAVEMENT, FULL DEPTH SILT FENCE HIGH VISIBILITY FENCE INLET PROTECTION REMOVE HMA PAVEMENT REMOVE CONCRETE SIDEWALK PLANING CLEARING AND GRUBBING 0 20 40 SCALE IN FEET no date revisions file no DM -5 scale 1"=20' date 3142013 0 0 Z MATCH LINE DM5 ► END CONSTRUCTION STA 72+80 MATCH EXISTING L 0 ...A7.-AMOMZej"):1 74+00 75+00 42ND AVE S. t rrsa. "— JUL 07 ?N CUrruri,n.1 ')EVELU{'MENI DEMO AND SITE PREPERATION NOTES: 0 REMOVE CEMENT CONCRETE CURB AND GUTTER 0 0 0 0 0 0 REMOVE CEMENT CONCRETE SIDEWALK REMOVE EXTRUDED CURB REMOVE AND RESET MAILBOX REMOVE DO NOT DISTURB INSTALL INLET PROTECTION IN CATCH BASIN LEGEND — SAW — SAW PAVEMENT, FULL DEPTH -4E--E— SILT FENCE HVF — HIGH VISIBILITY FENCE 0 AsNM INLET PROTECTION REMOVE HMA PAVEMENT REMOVE CONCRETE SIDEWALK PLANING CLEARING AND GRUBBING 0 20 40 SCALE IN FEET 4. 01 LA .; 908 PUBLIC WORKS DEPT. a°y -ENGINEERING-STREETS-WATER-SEWER-PARKS-BDILDING- de p e4 4/ CH211i1HILL® CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DEMOLITION AND EROSION CONTROL PLAN Ne no DM -6 scab 1.420' cions dab 314/2013 p SEE ALTERNATE SECTIONS L1 AND L2 ' 5' • - •5 4 SIDE- WALK PLAN -TER 51+40 TO 53+40 53+78 TO 65+50 ALTERNATE SECTION LI SEE ALTERNATE SECTIONS L1, L2, L3 AND L5 RETAINING WALL WITH FENCE 11' SEE ALTERNATE 14' SECTIONS R1 AND R2 BIKE LANE 5' SB -LANE NB -LANE WITH SHARROW 50+10 TO 53+00 69+00 TO 69+85 4' SIDE- WALK TYPICAL SECTION A FULL DEPTH PAVEMENT 11 AND VARIES 14'AND VARIES 53+25 to 61+70 ALTERNATE SECTION RI SEE ALTERNATE SECTIONS R1, R2, R4 AND R5 BIKE LANE SB -LANE NB -LANE WITH SHARROW 50+40 to 51+40 53+40 to 53+78 ALTERNATE SECTION L2 VARIES 65+50 TO 65+65 TRANSITION TO 5' SW 65+65 TO 67+00 SW = 5' 67+00 TO 67+10 SW TRANS. FROM 5'TO 7' 67+10 TO 67+70 SW = 7' 67+70 TO 67+80 SW TRANS. FROM 7'TO 5' 67+80 TO 68+40 SW = 5' 68+40 TO 68+90 SW TRANS. FROM 5' TO 7' 68+90 TO 69+35 SW = 7' 70+05 TO 70+90 SW = 7' ALTERNATE SECTION L3 RETAINING WALL - WITH RAILING 5' 4' SIDE- WALK PLAN -TER 63+20 TO 63+74 ALTERNATE SECTION L4 53+00 TO 54+80 69+85 TO 71+16.75 TYPICAL SECTION B FULL DEPTH PAVEMENT WITH OVEREXCAVATION O 3" 3" 18 4' 5' PLAN SIDE- -TER WALK ami MEI RETAINING WALL WITH RAILING 50+37 to 53+25 ALTERNATE SECTION R2 4' 5' PLAN -TER SIDE- WALK n 1 RETAINING WALL WITH FENCE 61+70 TO 62+40 ALTERNATE SECTION R3 65+95 TO 66+10 TRANSITION TO 7' SW 66+10 TO 69+55 SW = 7' 70+25 TO END SW = 7' ALTERNATE SECTION R4 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- date desired down geld I* no PRECAST CONCRETE BARRIER SEE ALTERNATE SEE ALTERNATE SECTIONS L1 AND L3 5' 11' 14' SECTIONS R1, R3 AND R4 BIKE LANE SEE ALTERNATE SECTIONS L2 AND L5 5' BIKE LANE SB -LANE 11' NB -LANE WITH SHARROW 10.5' OVERLAY 54+80 TO 68+00 OVERLAY 1- 3 TYPICAL SECTION C OVERLAY AND WIDENING 2" MIN 11' SB -LANE 11' 14' NB -LANE WITH SHARROW OVERLAY 68+00 TO 69+00 FULL DEPTH TYPICAL SECTION D OVERLAY AND WIDENING FULL DEPTH RIGHT OF CENTERLINE SEE ALTERNATE SECTIONS R4atAND R5 VARIES VARIES 69+35 TO 70+05 AT CULVERT ALTERNATE SECTION L5 CH2MHILL® VARIES OVERLAY 71+16.75 TO END 15' OVERLAY TYPICAL SECTION E OVERLAY WIDENING ON RIGHT SIDE ONLY O HMA CL. 'A -INCH PG 64-22 OHMA CL. 1 -INCH PG 64-22 OCRUSHED SURFACING BASE COURSE 2" MIN SEE ALTERNATE SECTION. R4 7 '7).1i4 'IE t Cn WENT CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III TYPICAL ROADWAY SECTIONS 69+55 TO 70+25 AT CULVERT PRECAST CONCRETE BARRIER ALTERNATE SECTION R5 J Se no RS -1 scale date revisions Oak 3/4/2013 44 43 42 41 40 39 38 37 36 42ND 50+14.13, 45.50' LT BEGIN J 49+00 100.00 BEGIN CONSTRUCTION STA 42ND 50+10 MATCH EXISTING SEE DETAIL 3 ON PVD -1 42ND 50+14.79, 46.07 RT BEGIN 1 s 4 50+00 R=35' i 42ND 50+49.67 16.00' LT BEGIN PLANTER r RW -1 L 142ND'..AVE S... Gni DWY1-1 2+00 3t 0 42ND 50+49.67, 14.50' RT BEGIN PLANTER RW -1R 4- co J W 160T1-1 160T1 -I ST 0 0 F. > 0 J W PROFILE GRADE L. =180.00' G1 =-10.000% G2 =-14.500% SD =329.81' + 0 0 + e0 w it) w EXISTING GROU w) 49+00 50+00 51+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by date URI RRW ed mien RJM prof dir 52+00 H211�1H1LL® N 0 z MATCH LINE P MATCH LINE PV2 42ND 53+30 PAVING CONSTRUCTION NOTES: O1 FULL DEPTH HMA PAVEMENT OFULL DEPTH HMA WITH 12" OVER - EXCAVATION HMA OVERLAY 2" MIN DRIVEWAY 4" HMA AC CURB RAMP SEE CI PVD -1 OVERLAY TO MATCH EXISTING GUTTER SEE Qj PVD -1 OVERLAY TO MATCH EXISTING SEE P PV0.1 DRIVEWAY # STATION WIDTH STANDARD DWY 1 -1 42ND 51+93.20 LT 15' RS -08B DWY 1 - 2 42ND 51+91.70 RT 20' RS -08B LEGEND I'I'I .I./ -----R-ECElVED x.072014 53+00 (; )tv1 I1tJN11 Y n a r d+NAFMT FULL DEPTH HMA PAVEMENT FULL DEPTH HMA PAVEMENT WITH 12"OVER- EXCAVATION HMA OVERLAY 2" MINIMUM DRIVEWAY 4" HMA CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE 111 PAVING PLAN AND PROFILE 0 20 40 SCALE IN FEET 9 0e tro PV -1 l date revisions scale 1"=20' date 31412013 1 RW -2L DWY2-2 DWY2-5 42ND 56+46.43, 41.00' (T END MATCH EXISTING 42ND 56+70.43, 41.00' LT END, MATCH EXISTING 42ND 57+09.48, 16.50' LT BEGIN PLANTER J 0, Z 400 390 380 370 u, z 'L 360 a W Z 350 S 340 330 320 19013 54+80 42ND 57+02.99 14.08' RT BEGIN PLANTER DWY2-3 DWY2-1 DWY2-4 DWY2-7 42ND 56+11.43, 14.50' RT END PLANTER 42ND 56+46.43 49.00' RT END 42ND 56+70.43 49.00' RT BEGIN, MATCH EXISTING M STATION SD =284.55' STANDARD DWY 2 - 1 42ND 53+30.90 RT 10' RS -08B DWY 2 - 2 42ND 53+88.44 LT 20' RS -08B DWY 2 - 3 42ND 53+62.41 RT 20' RS -08B DWY 2 - 4 42ND 54+14.92 RT 27' RS -08B DWY 2 - 5 N M O. M in {.P a+ c I'- m M 15' RS -08B DWY 2 - 6 42ND 55+24.12 LT 15' RS -08B DWY 2 - 7 42ND 55+66.82 RT 18' RS -08B DWY 2 - 8 42ND 57+76.26 LT 12' RS -08B \ —I> w N O 0 -_..... N +ps in >-I W +f ‘n ..D Nn ,In M a: -1 W O 0 N I+n< in in O nw +• e 0 o o m c -9. 0!-% >W -5.04 0 F. / N W w in -7.95%> m W 0 in in .o in M F. -I"'^' 16 in ,+aO OA in 0 c A wa CO M 0 o om O o sV M 0 O -7.30%> W 6.83%>w 'n et -7.44%> ^^ �< -I W a-1 -7-71%>W M -8.4'0 in r-+ "'„M, a_1 >W a1 Di 0 nrU- + u�,M -•.64%> Y. W i CAif1f1 ..... __ __ (.) PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEINER-PARKS-BUILDING- by me EWH KEW Poi.; RIM 1.4* dadbOno CH2M HILL® +00 INE PV3 42ND 5 X F Q 2 m 11 z Z Yr a W z J U 1- Q 2 • r PAVING CONSTRUCTION NOTES: FULL DEPTH HMA PAVEMENT FULL DEPTH HMA WITH 12" OVER - EXCAVATION HMA OVERLAY 2" MIN DRIVEWAY 4" HMA AC CURB RAMP SEE eal PVD -1 OVERLAY TO MATCH EXISTING GUTTER SEE PVD -1 OVERLAY TO MATCH EXISTING SEE (:::Th PVD -1 DRIVEWAY # STATION WIDTH STANDARD DWY 2 - 1 42ND 53+30.90 RT 10' RS -08B DWY 2 - 2 42ND 53+88.44 LT 20' RS -08B DWY 2 - 3 42ND 53+62.41 RT 20' RS -08B DWY 2 - 4 42ND 54+14.92 RT 27' RS -08B DWY 2 - 5 42ND 54+63.23 LT 15' RS -08B DWY 2 - 6 42ND 55+24.12 LT 15' RS -08B DWY 2 - 7 42ND 55+66.82 RT 18' RS -08B DWY 2 - 8 42ND 57+76.26 LT 12' RS -08B LEGEND IL L J(14Ifv1111,1 1 r li V[ I CJPMFNI FULL DEPTH HMA PAVEMENT FULL DEPTH HMA PAVEMENT WITH 12" OVER - EXCAVATION HMA OVERLAY 2" MINIMUM DRIVEWAY 4" HMA CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING PLAN AND PROFILE )11111•■ -- 0 20 40 SCALE IN FEET d0. revisions 10, \ Ole no scale date PV -2 1"=20' 3/4/2013 350 340 330 320 310 300 290 280 270 co Ln z z N a w z J x 1- MATCH LINE PV2 42ND 57+80 DWY3-3 DWY 3-6 DWY 3-8 O --- O 7,, .. © r ,r DWY 3 - 1 42ND 57+96.53 RT 14' ®r DWY 3 - 2 42ND 58+42.45 RT 15' RS -08B DWY 3 - 3 42ND 58+56.10 LT 20' RS -08B DWY 3 - 4 42ND 59+06.44 RT 24' RS -08B DWY 3 - 5 ( RT 20' RS -08B DWY 3 - 6 42ND 59+91.64 LT 34' RS -09 DWY 3 - 7 42ND 60+05.93 7Y 20' RS -08B f� y .05800%' /+0//b� RS -09 p 00� b M �r 1 / ; �/ 2 �%' //%2ND ,y / /�/. q / � V % / / t l O O O O 4 DWY3-5 1 111/W1_7 . DWY3-1 DWY3-2 DWY3-4 RW -3R 58+00 59+00 60+00 61+00 62+00 MATCH LINE PV4 42ND 62+30 PAVING CONSTRUCTION NOTES: 0 O O O FULL DEPTH HMA PAVEMENT FULL DEPTH HMA WITH 12" OVER - EXCAVATION HMA OVERLAY 2" MIN DRIVEWAY 4" HMA AC CURB RAMP SEE OVERLAY TO MATCH SEE eTh PVD -1 OVERLAY TO MATCH PVD -1 EXISTING GUTTER EXISTING SEE PVD -1 DRIVEWAY # STATION WIDTH STANDARD DWY 3 - 1 42ND 57+96.53 RT 14' RS -08B DWY 3 - 2 42ND 58+42.45 RT 15' RS -08B DWY 3 - 3 42ND 58+56.10 LT 20' RS -08B DWY 3 - 4 42ND 59+06.44 RT 24' RS -08B DWY 3 - 5 42ND 59+60.54 RT 20' RS -08B DWY 3 - 6 42ND 59+91.64 LT 34' RS -09 DWY 3 - 7 42ND 60+05.93 RT 20' RS -08B DWY 3 - 8 42ND 61+59.25 LT 30' RS -09 LEGEND ILI'l rALNI "' RECEIVED EiL O'/ 2C Kw IL 1908 PUBLIC WORKS DEPT® -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- date designed de+. KR checked wow Rd orei geld kk no C111211/1HILL. C()MMUNI 1 1 It I r 111,41::PJT FULL DEPTH HMA PAVEMENT FULL DEPTH HMA PAVEMENT WITH 12" OVER - EXCAVATION HMA OVERLAY 2" MINIMUM DRIVEWAY 4" HMA 0 20 40 SCALE IN FEET CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING PLAN AND PROFILE fJe no PV -3 date revsions tale 1"=20' dab 31412013 300 290 280 270 260 250 240 230 220 M 0 z MATCH LINE P MATCH LINE PV3 42ND 62+30 a DWY4-1 63+00 a • • • RW -3L •• • • • • DV <4-3 c, 64+00 16 42ND 65+65 00, 21 00' LT END TAPER 42ND 65+50.00 25.00' LT BEGIN TAPER 42ND 65+50.00 16.50' LT END PLANTER 65+0G, 66+00 N 1"05'39.45" E 1649.97 42ND "AVE S. 14' L DWY4-2 DWY4-4 DWY4-5 42ND 65+95.00, 14.50' RT END. PLANTER • 42ND 65+95.06,3.00' RT/ 42ND 66+10‘.90. 21.00' RT • • • • • 0 IOn 0 + N n N 0 0 + 0 '14.200 e 1- J W -14 + t• ▪ • O 0 .to 0rO N „ O + e w - O -N- V- 43.0% 13.07% > Al .O -1243% 0. EXISTING GROUND a0 J AJ 13.70%0. PROFILE GRADE 0 .O 3.83%0. N N J W SR 518 Il) N n n t0 N 0. J -13, O 0 O re' a 63+00 64+00 O O 41 0 -12.49%> .0 0 N • triN J •0 • -9.54%> CO CD N w 0 0 0 ▪ O O+ M N . N se t N + 0.0 -9.28% > wa -7.97% > r N N W 0 oD .D -7.92% > N N J In .O v VE_ PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- 0 date designed KRW Pro .n0 pro dr RJM Mdbk no 65+00 CH2MHILL® 66+00 INE PV5 42ND 66+80 S U 1- 2 MATCH LINE PV5 42ND 66+80 CF L • PAVING CONSTRUCTION NOTES: O1 FULL DEPTH HMA PAVEMENT OFULL DEPTH HMA WITH 12" OVER - EXCAVATION O3 HMA OVERLAY 2" MIN DRIVEWAY 4" HMA AC CURB RAMP SEE PVD -1 OVERLAY TO MATCH EXISTING GUTTER SEE PVD -1 OVERLAY TO MATCH EXISTING SEE PVD -1 DRIVEWAY # STATION WIDTH STANDARD DWY 4 - 1 42ND 63+07.98 LT 20' RS -08B DWY 4 - 2 42ND 63+42.59 RT 12' RS -08B DWY 4 - 3 42ND 63+84.27 LT 20' RS -08B DWY 4 - 4 42ND 63+92.94 RT 12' RS -08B DWY 4 - 5 42ND 65+27.16 RT 31' RS -08B LEGEND IL COMMUNi 1 )EVF1 OPMENT FULL DEPTH HMA PAVEMENT FULL DEPTH HMA PAVEMENT WITH 12" OVER - EXCAVATION HMA OVERLAY 2" MINIMUM DRIVEWAY 4" HMA CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING PLAN AND PROFILE 0 20 40 SCALE IN FEET 0e 0 PV -4 6To Cate revisions scale 1"=20' dale 3/1/2013 , 42ND 67+10.00 23.00' LT END TAPER 42ND 67+00.00 21.00' LT BEGIN TAPER 280 270 260 42ND 67+70.00 23.00' LT 42ND 68+40.00, 21.00' LT BEGIN TAPER / BEGIN TAPER 42ND 67+80.00, 21.00' LT END TAPER 42ND 68+950.00 23.00' LT- END TEND TAPER \ i 42ND 69+94.95 AP 23.00' LT 42N69+34.68, 23 00' LT BEGIN BARRIER 42ND MATC 71+16.80, 19.50' LT H EXISTING SIDEWALK 42ND 70+04.91, END BARRIER DWY5-1 24.00' LT 42ND.: 70+07 00, 16.00' LT BEGIN TAPER 42ND 70+72.84, 23.80' LT 0 z N a W J 2 o 250 0 z 240 a W Z J 230 0 220 210 200 42ND 69+55.11, 22.00' RT BEGIN BARRIER I 1;; I. m 42ND 70+30.68, 21.00' RT / 1 BEGIN TAPER 9A - 42ND 69+65.06, 21.00' RT AP 42ND 70+30.08, 14.00' RT BEGIN TAPER 1 42ND 70+25.33, 21.00' RT 78` END BARRIER (7 i 69+00 70+00 71+00 + } n 0 N a W z J S M 0 z v a W z J 0 i PAVING CONSTRUCTION NOTES: OFULL DEPTH HMA PAVEMENT OFULL DEPTH HMA WITH 12" OVER - EXCAVATION HMA OVERLAY 2" MIN DRIVEWAY 4" HMA AC CURB RAMP SEE PVD -1 OVERLAY TO MATCH EXISTING GUTTER SEE Q PVD -1 OVERLAY TO MATCH EXISTING SEE PVD -1 DRIVEWAY # STATION WIDTH STANDARD DWY5-1 42ND 68+01.25 LT 18' RS -08C LEGEND I'I'1 FULL DEPTH HMA PAVEMENT FULL DEPTH HMA PAVEMENT WITH 12" OVER - EXCAVATION HMA OVERLAY 2" MINIMUM DRIVEWAY 4" HMA ;ECS '` T) f�l;�� 0 7 201' COMMU, .FVELOP 0 20 40 SCALE IN FEET PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BU ILDING- dw de: BAN w poi db Rett bk no CI112MHILL. CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING PLAN AND PROFILE '13 file no PV -5 de revision scale 1"=20' date 31412013 LRT O Ckn O to O N c.4 p O ars M N t0 } n N O N O an t W etQ N O O 1!i r t N e+1 O 1:1: O O t0 Q O N 1::: O O O p •••". O p O p O 4:2 O O G O O O Vi A LL -6.42°� i W ° 5.66/°479°� > W C N J W .O 0 45% N N J W O aJ -3.45% > N W o 3.15/° + N _N o J > W .2.15%�W + W ON _ O. N J 1.84%>W n a0 61 t0� N d J O �� tDN O. o, 9W Q1 J ° _ lii I+f t 0:a 01� `°�' �W O to +oo `°� aW ^'k a e.1 r ca +} � O N CJ O o� r aJ 03 O N N A } r•-• ,- N 1J V01 + p°r n O O 471 J N Vf Q +°� r,es � N aW p + r- O. >W "1: 01 Fr J 5.28 + N rN i W 4E33% 1.14 0 0 • n 69+00 70+00 71+00 + } n 0 N a W z J S M 0 z v a W z J 0 i PAVING CONSTRUCTION NOTES: OFULL DEPTH HMA PAVEMENT OFULL DEPTH HMA WITH 12" OVER - EXCAVATION HMA OVERLAY 2" MIN DRIVEWAY 4" HMA AC CURB RAMP SEE PVD -1 OVERLAY TO MATCH EXISTING GUTTER SEE Q PVD -1 OVERLAY TO MATCH EXISTING SEE PVD -1 DRIVEWAY # STATION WIDTH STANDARD DWY5-1 42ND 68+01.25 LT 18' RS -08C LEGEND I'I'1 FULL DEPTH HMA PAVEMENT FULL DEPTH HMA PAVEMENT WITH 12" OVER - EXCAVATION HMA OVERLAY 2" MINIMUM DRIVEWAY 4" HMA ;ECS '` T) f�l;�� 0 7 201' COMMU, .FVELOP 0 20 40 SCALE IN FEET PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BU ILDING- dw de: BAN w poi db Rett bk no CI112MHILL. CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING PLAN AND PROFILE '13 file no PV -5 de revision scale 1"=20' date 31412013 MATCH LINE PVS 42ND 71+30 280 270 260 250 z 240 230 220 210 200 In MATCH LINE P 72+00 X 1 73+00 \, END PAVING CONSTRUCTION NOTES: , CONSTRUCTION O FULL DEPTH HMA PAVEMENT STA 72+80 MATCH EXISTINGFULL DEPTH HMA WITH 12" OVER- , O EXCAVATION I O3 HMA OVERLAY 2" MIN L 74+00 75+00 42ND 71+62.07, 21.50' RT END TAPER 42ND 72+58.97, 28.50' RT 42ND 72+87.95, 36.75' RT MATCH EXISTING 42ND AVE S. N 1°05'39.74" E 348.51 0 -p .o 0. o ui r- o N + O1 + r N n N k. N C J 7.89% W .r L1--6:5 1._. > w 5.33% E. > 6.59% _ 0 O 6.92° SC BLVD 72+00 1 73+00 74+00 75+00 MATCH LINE PV6 42ND 71+3 O4 DRIVEWAY 4" HMA O AC CURB RAMP SEE PVD -1 ®OVERLAY TO MATCH EXISTING GUTTER SEE Q PVD -1 O7 OVERLAY TO MATCH EXISTING SEE 0 PVD -1 LEGEND PALM' IV CES OMMUNI VEL OPMEN s FULL DEPTH HMA PAVEMENT FULL DEPTH HMA PAVEMENT WITH 12" OVER - EXCAVATION HMA OVERLAY 2" MINIMUM DRIVEWAY 4" HMA AIM 0 20 40 SCALE IN FEET PUBLIC WORKS DEPT. -ENGI NEERING-STREETS-WATER-SEWER-PARKS-BUILDING- mu designee EWH NRN checked enol en° wei * RIM kid kk no CH2MHILL, CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING PLAN AND PROFILE dale revisions 14, IlPV-6 e ° ° soal° r=so' date 3/4/2013 1, o PROVIDE SEAL AND SAND COVER OVER JOINT, EXTEND 6" EACH SIDE OF JOIN EXST ROAD 2" MIN TO 3" 2" MIN OVERLA LENGTH VARIES PLANING BITUMINOUS PAVEMENT/ OVERLAY JOINT DETAIL n NTS PLANING WIDTH VARIES EXISTING PAVEMENT K81 L4 1908 z PV -2 AND PV -6 HMA CL IVY" PG 64-22 AT CURB PAVEMENT PLANING DETAIL NTS PV -5, PV -6, DM -5, DM -6 EXISTING SIDEWALK EXISTING CURB & GUTTER u PROVIDE SEAL AND SAND COVER OVER JOINT — EXTEND 6" EACH SIDE OF JOI 12" SAW CUT EXISTING AC BACK TO REVEAL 12" MIN UNDISTURBED EXISTING BASE 4" HMA CL 12" PG 64-22 UNDISTURBED EXISTING BASE COURSE MATCH LINE AS CALLE OUT IN ALIGNMENT AND PAVING SHEETS 6" CRUSHED SURFACING BASE COURSE PAVEMENT MATCH DETAIL 13" NTS CEMENT CONCRETE SIDEWALK HMA CL 1/2" PG 64-22 PV -1 SIDEWALK END POINT SHOWN IN ALIGNMENT, PAVING AND GRADING PLANS 12 1111-1111 ----- --------- ------------- 1111= EXISTING SURFACE AC CURB RAMP DETAIL NTS PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by aged drawn Ae on(ere p<q ar adEbk no PV -1 AND PV -6 ©H2MHILL. TYPE 6 EXTRUDED CURB 4" HMA CL 12" PG 64-22 1.5' (MIN.) SEE PLANTING PLANS FOR TREATMENT OF PLANTER AREAS 6" CRUSHED SURFACING BASE COURSE EPDXY ADHESIVE ANCHORING METHOD SHALL BE USED DRIVEWAY PAVING SECTION NTS REC'` 1,C!L 0 7 ZQ11 COMMI.,. )EVELONMI 1 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III PAVING AND GRADING DETAILS 15 fk no PVD -1 Ere revisions scale date 3/4/2013 440 430 420 410 400 390 380 370 360 100.00 CONSTRUCTION STA 42ND 50+14.5 MATCH EXISTING + FINISHED GRADE 49+00 50+00 PUBLIC WORKS DEPT. EXISTING GROUND 51+00 -ENGI NEERING-STREETS-WATER-SEWER-PARKS-BUILDI NG - date designed EVAI draw 4deckad tRW nd ere 04 Mr RIM MM bk no 52+00 CH2M H I LL® 53+00 in 0 z N N 0 W z J s 0 1— a 2 UTILITY CONSTRUCTION NOTES: OREMOVE EXISTING MANHOLE OR CATCH BASIN REMOVE EXISTING PIPE TO LIMITS AS SHOWN REMOVE EXISTING STRUCTURE AS SPECIFIED COM t. 1EVEW* ABANDON EXISTING PIPE AND/OR CATCH BASIN CONNECT EXISTING PIPE TO NEW CATCH BASIN/MANHOLE CONNECT NEW PIPE TO EXISTING CATCH BASIN/MANHOLE CONNECT WALL UNDERDRAIN TO CATCH BASIN ADJUST EXISITING CATCH BASIN OR MANHOLE TO FINISHED GRADE ADJUST EXISTING UTILITIES CASTING TO GRADE ADJUST EXISTING UTILITIES CASTING TO GRADE BY OTHERS RELOCATE TIMBER UTILITIES POLE BY OTHERS RELOCATE FIRE HYDRANT ASSEMBLY INSTALL NEW FIRE HYDRANT ASSEMBLY INSTALL NEW WATER METER CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE AND UTILITY PLAN AND PROFILE MEM 0 20 40 SCALE IN FEET aw revisions 16 J file no DR -1 scale 1"=20' date 3/412013 ▪ ism 0 400 390 380 0 370 '^ z 360 0 2 350 5 340 330 320 FINISHED GRADE -4 EXISTING GROUND MATCH LINE DR3 42ND 57+80 MATCH LINE DR3 42ND 57+80 UTILITY CONSTRUCTION NOTES: O REMOVE EXISTING MANHOLE OR CATCH BASIN OREMOVE EXISTING PIPE TO LIMITS AS SHOWN OREMOVE EXISTING STRUCTURE AS SPECIFIED OABANDON EXISTING PIPE AND/OR CATCH BASIN O CONNECT EXISTING PIPE TO NEW CATCH BASIN/MANHOLE OBASIN/MANHOLE CONNECT NEW PIPE TO EXISTING CATCH ® CONNECT WALL UNDERDRAIN TO CATCH BASIN O ADJUST EXISITING CATCH BASIN OR MANHOLE TO FINISHED GRADE OADJUST EXISTING UTILITIES CASTING TO GRADE 10 ADJUST EXISTING UTILITIES CASTING TO GRADE BY OTHERS 11 RELOCATE TIMBER UTILITIES POLE BY OTHERS 72 RELOCATE FIRE HYDRANT ASSEMBLY 13 INSTALL NEW FIRE HYDRANT ASSEMBLY 14 INSTALL NEW WATER METER Rcr-:'•'_ -� 54+00 55+00 56+00 57+00 '171, A 07`�� Il' 0 20 40 SCALE IN FEET COMMI , TF: VELOI'ML PUBLIC WORKS DEPT. M CH2 HILL® CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III -ENGINEERING-STREETS-WATER-SEWER-PARKS.• BUILDING- DRAINAGE AND UTILITY PLAN AND PROFILE MATCH LINE DR4 42ND UTILITY CONSTRUCTION NOTES: O REMOVE EXISTING MANHOLE OR CATCH BASIN 350 340 330 O 320 Z N 310 c W Z J 300 63 1— a 2 290 280 270 RELOCATE EXISTING 4" GAS ® REMOVE EXISTING PIPE TO LIMITS AS SHOWN OREMOVE EXISTING STRUCTURE AS SPECIFIED O ABANDON EXISTING PIPE AND/OR CATCH O CONNECT EXISTING PIPE TO NEW CATCH BASIN/MANHOLE OCONNECT NEW PIPE TO EXISTING CATCH BASIN/MANHOLE O CONNECT WALL UNDERDRAIN TO CATCH BASIN ® ADJUST EXISITING CATCH BASIN OR MANHOLE TO FINISHED GRADE O ADJUST EXISTING UTILITIES CASTING TO GRADE 0,ADJUST EXISTING UTILITIES CASTING TO GRADE BY OTHERS 11 RELOCATE TIMBER UTILITIES POLE BY OTHERS RELOCATE FIRE HYDRANT ASSEMBLY 13 INSTALL NEW FIRE HYDRANT ASSEMBLY FINISHED GRADE EXISTING GROUND 58+00 4- 59+00 60+00 61+00 62+00 MATCH LINE DR4 42ND 62+30 c DEVI 14 INSTALL NEW WATER METER MED 0 20 40 SCALE IN FEET PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- date ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- dale designee KRW prof en9 RIM 9rol & IIetlN no CH2M H I LL® CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE AND UTILITY PLAN AND PROFILE dale revisions 18 Se. DR -3 scale 1"=20' dale 3/4/2013 • • • • • • •\• • r s I , x z z 0 0 w z s 0 2 300 290 280 0 N 270 tO Z N M 260 0 W z J 250 6 1- 2 240 230 220 63+00 64+00 42ND AVE S. , 65+00 • RELOCATE 4" GAS • • • • • • • • • • + EXISTING GROUND + SR 518 BRIDGE FINISHED GRADE UTILITY CONSTRUCTION NOTES: OREMOVE EXISTING MANHOLE OR CATCH BASIN OREMOVE EXISTING PIPE TO LIMITS AS SHOWN O3 REMOVE EXISTING STRUCTURE AS SPECIFIED 0 ABANDON EXISTING PIPE AND/OR CATCH m 4 BASIN • OCONNECT EXISTING PIPE TO NEW CATCH BASIN/MANHOLE 0 z O CONNECT NEW PIPE TO EXISTING CATCH v 6 BASIN/MANHOLE Q O CONNECT WALL UNDERDRAIN TO CATCH BASIN z O ADJUST EXISITING CATCH BASIN OR J 8 MANHOLE TO FINISHED GRADE OO = GRADE ADJUST EXISTING UTILITIES CASTING TO a 2 10 ADJUST EXISTING UTILITIES CASTING TO GRADE BY OTHERS 11 RELOCATE TIMBER UTILITIES POLE BY OTHERS 12 RELOCATE FIRE HYDRANT ASSEMBLY 0 13 INSTALL NEW FIRE HYDRANT ASSEMBLY Pthilli 14 INSTALL NEW WATER METER MATCH LINE DRS 42ND 66+80 RECFIVED A0a72014 63+00 64+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING. by data dasigned MI drawn cw Mien.; prof d field bk no 65+00 CH2MHILL® 66+00 Cot, DEVIL ,t,t\ht 14I CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE AND UTILITY PLAN AND PROFILE 0 20 40 SCALE IN FEET 19 Servo DR -4 dal revisions sale I'=20' date 3/4/2013 OUTFALL PRETREATMENT UNIT B 03 0 z z N cc w z J x U 2 280 270 260 250 z z N 240 0 w z J 230 5 1- z 220 210 200 67+00 68+00 6500 42ND AVE S. ST". -==1 ST ST_-iST ST - ST FLOW CONTROL STRUCTURE RELOCATE 12" GAS DETENTION TANK NEW CULVERT 2 x 68LF, 6' DIAM SEE SHEET CV -1 EXISTING GILLIAM 1 CREEK CULVERT (36" CONC) 1 1 SR 518 BRIDGE 7 4 4- FINISHED GRADE DETENTION TANK 2x68 LF, 6' DIAM 3' MIN COVER •1- EXISTING GROUND FLOWCONTROL STRUCTUR 67+00 68+00 69+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- ny axe designed VAN drawn KRW Necked pr)crag -m RIM Md ek no MATCH LINE DR6 42ND 71 MATCH LINE DR6 42ND 71+30 70+00 71+00 C. )EVI CH2MH I LL® UTILITY CONSTRUCTION NOTES: REMOVE EXISTING MANHOLE OR CATCH BASIN REMOVE EXISTING PIPE TO LIMITS AS SHOWN REMOVE EXISTING STRUCTURE AS SPECIFIED ABANDON EXISTING PIPE AND/OR CATCH BASIN CONNECT EXISTING PIPE TO NEW CATCH BASIN/MANHOLE CONNECT NEW PIPE TO EXISTING CATCH BASIN/MANHOLE CONNECT WALL UNDER DRAIN TO CATCH BASIN ADJUST EXISITING CATCH BASIN OR MANHOLE TO FINISHED GRADE ADJUST EXISTING UTILITIES CASTING TO GRADE ADJUST EXISTING UTILITIES CASTING TO GRADE BY OTHERS RELOCATE TIMBER UTILITIES POLE BY OTHERS RELOCATE FIRE HYDRANT ASSEMBLY INSTALL NEW FIRE HYDRANT ASSEMBLY INSTALL NEW WATER METER CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE AND UTILITY PLAN AND PROFILE 0 20 40 SCALE IN FEET date revisions 20 file no DR -5 scale 1"=20' date 314/2013 O b / MATCH LINE DRS 42ND 71+30 280 270 260 0 + 250 z z N d' N 240 c w z J 230 Q 1- 2 220 210 200 NOG 111 .. 1 S 1 I. 0 • 1 13 1\ tP 1 \ ' O"' 73+q0 74+00 75+00 1' 42ND AVE S. N 1°05'39.74" E 348.51 EXISTING GROUND -----r----=---- 72+00 L t 73+00 74+00 75+00 UTILITY CONSTRUCTION NOTES: O REMOVE EXISTING MANHOLE OR CATCH BASIN ® REMOVE EXISTING PIPE TO LIMITS AS SHOWN O3 REMOVE EXISTING STRUCTURE AS SPECIFIED OABANDON EXISTING PIPE AND/OR CATCH BASIN OCONNECT EXISTING PIPE TO NEW CATCH BASIN/MANHOLE OCONNECT NEW PIPE TO EXISTING CATCH BASIN/MANHOLE ® CONNECTBASIN WALL UNDERDRAIN TO CATCH OADJUST EXISITING CATCH BASIN OR MANHOLE TO FINISHED GRADE ® ADJUST EXISTING UTILITIES CASTING TO GRADE 10 ADJUST EXISTING UTILITIES CASTING TO GRADE BY OTHERS 11 RELOCATE TIMBER UTILITIES POLE BY OTHERS 12 RELOCATE FIRE HYDRANT ASSEMBLY 13 INSTALL NEW FIRE HYDRANT ASSEMBLY 14 INSTALL NEW WATER METER JiL. 0'7 2O . c;1 DEVI. I .j7'tv,i to f O 20 40 SCALE IN FEET 1908 PUBLIC WORKS DEPT. -ENGI NEERING-STREETS-WATER-SEWER-PARKS-BUI LDI NG - by day KR wei ens RJ prof dk IIdd bk CH21V11-11 LL® CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE AND UTILITY PLAN AND PROFILE 421' file no DR -6 dale revisions cele 1"=20' date 3/4/2013 A A FLOW CATCH BASIN GRATE ROADWAY FLOW SIDEWALK 6" 1' PLAN PLANTER • SECTION A -A 2% PROJECTION Zo/ PUBLIC WORKS DEPT. - EN G I N EERI NG -STREETS -WATER -SEWER -PARKS -B U I LD I N G- Orde desgn.d drawn prof ane prof dr field Ek no CH2MH I LL® CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III DRAINAGE AND UTILITY DETAILS 22 ,## Re no DRD-1 scale dale revisions date 3/4/2013 o C2 .GC 21+9'147 .&. —„ \ BEGIN NEW CHANNEL- CONSTRUCTION :PROPOSE,D µ11C8'- �:ALII liNI,ZED STEL CULVERT GC 23fi2 F1'= 42ND 69*8 // / 4 xiC 24'05.00 END NEW CHAN r; I / EXISTING FALLEN LOG 220 210 200 190 // T sr, i r A 42ND Z 0 1— PE U Z z P U 0 cc in J .UJ- LLl ac0 >Z SND — m = — '-cN. o j FLOW LINE 0• U i CV rnUZ oIJLw Oft - .r�v�/.Oo Jaw ,, ..p�slp��ilOpSt7CJOp��=��0 ��m —•� p•v���o�OQQ�oQO�Q�oQOC)co�O�• .o_�••�o- s irl �....•Q.IO �Opo OHO „,no 0OOo�O�00oO�...o� - 1 4" G 12" G 24" SS 12"1./V TOP OF I L _I CULVERT SCL DB 1 0 + N U 0 �? LIS U N 0 LL W O di + N 00•ZA•41. lb� �,!'p0• : PS -CVD -001 101510.Cgn 42ND AVE S. U' 0 EX 12" G EX 4" G 24" SS JOINT ELECTRICAL/ COMM. DUCTBANK 16' DIA CMP (10 GAUGE) MULTI—PLATE ARCHES CULVERT STREAMBED GRAVEL (36" THICK) CONCRETE FOOTING CULVERT SECTION EX 12" W EXISTING 36" CONC CULVERT PROPOSED GRADE EXISTING GROUND 1- Q) NEW ST • PUBLIC WORKS DEPT. -ENGI NEERING-STREETS-WATER-SEWER-PARKS-BUILD/ NG - e ducked va•re field bk no CH2MHIELF !V CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CULVERT DETAILS 24 ## file no CVD -1 r stale revisions dale 3/4/2013 a,4 300.00 49+00 50-00 42ND 50+35.92, 11.00' LT BEGIN -42ND 50+39.50, 13.22' LT 5' 11' 51+00 42ND AVE S. 52+00 art 042ND 53+04.29, 13.28LT 42ND 50+62.94, 11.00'RT0 42ND 50,+35.65 0.00' LT BEGIN ( 1908 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- by d eym drawn KRW ducked we' ena crei Ile/dbkno CH2MHILL. 53+00 0 M u, 5 z 14 Z J S REC I" u 07 �,1aj• COMM1 .—..*_a ems, PAVEMENT MARKING NOTES: O STOP BAR O DOUBLE YELLOW CENTERLINE • 4" WHITE PAINT LINE O BICYCLE LANE SYMBOL 0 SHARROW SYMBOL • 8" GORE STRIPE 7O PLASTIC TURN ARROW SIGNING NOTES: O1 REMOVE EXISTING SIGN 0 INSTALL NEW SIGN 3O RELOCATE SIGN CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN 0 20 40 SCALE IN FEET 25 ## file no CH•1 revisions scale 1' 20' dale 3/4/1013 1 PSLN002_134510.dr 908 N H UNE CH1 42ND 1- 2 5' 11' 14' 54+00 55+00 42ND 56+58.42, 35132' LT END 42ND 56+29.20, 11.00' LT END ® 042ND 56+03.30, 13.56' LT 4 BICYCLE LANE SYMBOL 42ND AVE S. PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- S.155TH ST 42ND BEGIN 6+58.42. 85.32' LT 42ND 56+94.50, 11:00'LT/ EGIN �/ 42ND 56+97.98, 13.36' LT BICYCLE LANE SYMBOL 56+00 Q42ND 56+9.53, 11.00' RT SHARROW 0 �42N D. 56+29.20, 0.00' LT 2 END by due designed EMI KRW snedad era ma Ped RJM field nk no 57+00 42ND 56+58.42, 3$.25' RT BEGIN 2 42ND 56+58.42, 86.25' RT END CH2MHILL, - - ... - -.-_/ 11' 14' 42ND 57+14.07, 11.00' RTO SHARROW 2ND 56+94.50. 0.00' LT BEGIN co H UNE CH3 42ND 5 ; PAVEMENT MARKING NOTES: O STOP BAR O DOUBLE YELLOW CENTERLINE O 4" WHITE PAINT LINE ▪ BICYCLE LANE SYMBOL • SHARROW SYMBOL O8" GORE STRIPE O PLASTIC TURN ARROW SIGNING NOTES: O1 REMOVE EXISTING SIGN 0 INSTALL NEW SIGN RELOCATE SIGN CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN 0 20 40 SCALE IN FEET sm revisions 26 fle no CH -2 soak dale 3/4/2013 C. 111 0 z N eN X v W z x U 42ND 59+26.55 '11.00' RI. PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- dale ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- dale designed EMI dram Nn checked RJ rola geld bk no CH2MH1LL. REC - ra (} ry n PAVEMENT MARKING NOTES: 01 STOP BAR OZ DOUBLE YELLOW CENTERLINE O3 4" WHITE PAINT LINE O4 BICYCLE LANE SYMBOL OS SHARROW SYMBOL 06 8" GORE STRIPE O7 PLASTIC TURN ARROW SIGNING NOTES: 1I REMOVE EXISTING SIGN O 0 INSTALL NEW SIGN RELOCATE SIGN W 2 OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN 3111111111 O 20 40 SCALE IN FEET 27 file no CH -3 revisions scale P=20' date 31412013 42ND 59+08.55, 13.06' LTC, u Q 4 42ND 62+09.46, 13.06' LT .. .. ... ..— ....... .. ..... /.� . •... � - .... ............ ---- nesse.. � , � �:_r rte.:; .,. 5 .. _, �. _ .. 5 11' 58+00 59+00 60+00 61+00 62+00 11' 14' 42ND AVE S. © 14' 1 .-rix- •" ...... ... . V'✓• R. e R> s-frn4..:t.` a:a?r — —, tt ,.+.4JW 1tN � `> < :>� t 'S 42ND t...». f r ... 62+27.39+27.39; 11.00' RT — — 42ND 59+26.55 '11.00' RI. PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- dale ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- dale designed EMI dram Nn checked RJ rola geld bk no CH2MH1LL. REC - ra (} ry n PAVEMENT MARKING NOTES: 01 STOP BAR OZ DOUBLE YELLOW CENTERLINE O3 4" WHITE PAINT LINE O4 BICYCLE LANE SYMBOL OS SHARROW SYMBOL 06 8" GORE STRIPE O7 PLASTIC TURN ARROW SIGNING NOTES: 1I REMOVE EXISTING SIGN O 0 INSTALL NEW SIGN RELOCATE SIGN W 2 OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN 3111111111 O 20 40 SCALE IN FEET 27 file no CH -3 revisions scale P=20' date 31412013 1 J�r,WI Lq �i 908 MATCH LINE CH3 42ND 62+30 •\ r 01 42ND 65+05.67, 13.13' LT tP 7 8 5' 11' 63+00 64+00 b 65+00 66+00 14' 42ND AVE S. 0/ N 1"05'39.45" E 1649.97 1 42ND 65+21.84, 11.00' RT I 5 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- dale desired EWN draw, m.rkm 0.1 ens w.l di, eeM bk no KRW RJM CH2MHILL® • • • • • • • PAVEMENT MARKING NOTES: • STOP BAR • DOUBLE YELLOW CENTERLINE O 4" WHITE PAINT LINE 4O BICYCLE LANE SYMBOL OSHARROW SYMBOL 6O 8" GORE STRIPE O7 PLASTIC TURN ARROW SIGNING NOTES: a0 REMOVE EXISTING SIGN 0 0 INSTALL NEW SIGN O RELOCATE SIGN w z 1 x U 1- 2 2 JINNI„'M{ i i CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN 0 20 40 SCALE IN FEET MO da revisions 28 file no CH -4 scale 1"=20' dale 3/4/2013 H LINE CH4 42ND 66 1— Q (Th 1 • • • • • • • • • • • • :42ND 618+14.35, 13.67' LT 1 42ND ;770+29.54, 11:10' LT BEGIN- TAPER 42ND 70+29.83, 0.06. LT BEGIN TAPER\ 42ND 71+08.62. 16.22' LT END /42ND 70+97.42. 16.00' LT 5 11' 67+00 68+00 69+00 '70+00 11' 71+00 14' 42ND AVE S. 2ND; `N"68+32:3'1; "11:'00' PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- EMI dram ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- dram KRw checked prM •np FJ prof cfir a.ld bk no 42NE 70+29.17, 11.00' RT SHARROW C1.12MHILL® �CEIVED L 07 2Pi PAVEMENT MARKING NOTES: • STOP BAR • DOUBLE YELLOW CENTERLINE O3 4" WHITE PAINT LINE 4O BICYCLE LANE SYMBOL • SHARROW SYMBOL • 8" GORE STRIPE O7 PLASTIC TURN ARROW SIGNING NOTES: CfD REMOVE EXISTING SIGN 2� INSTALL NEW SIGN CD RELOCATE SIGN CITY OF TU ILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN O 20 40 SCALE IN FEET 29 e no CH -5 r we 1^QC' no dxa revisions dale 3/4/2013 0 z MATCH LINE CH5 42ND 71+64.83, 4.50' LT END TAPER 42ND 71+85.88, 0.98' LTO 42ND 72+19.22 15.60' LT 72100 26' 14' 42ND 71+78.16, 7.50' RT BEGIN 42ND 71+68.18, 17.45' RT® 42ND 72+50.12, 17.23' RT O42ND 72+50.44, 7.50' RT 6 END 42ND 72+29.22, 0.10' LTO 42ND 72+51.89, 4.50' LTO END 111 END 11 CONSTRUCTION STA 72+80 MATCH EXISTING PAVEMENT MARKING NOTES: O STOP BAR O DOUBLE YELLOW CENTERLINE • 4" WHITE PAINT LINE O BICYCLE LANE SYMBOL OSHARROW SYMBOL O6 8" GORE STRIPE OPLASTIC TURN ARROW 1 SIGNING NOTES: 0 REMOVE EXISTING SIGN 2O INSTALL NEW SIGN 0 RELOCATE SIGN 73+0\1 74100 75+00 PUBLIC WORKS DEPT. -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- 42ND AVE S. N 1°05'39.74" E 348.51 designed KWH drawn KRW Necked WW eaa Wq� Reid bk no RJM CH2MH I LL® (;( NI IJ1 )pNSI-1\11 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III CHANNELIZATION, ILLUMINATION AND SIGNING PLAN 0 20 40 SCALE IN FEET 4 - rem end 30 I 0e Re CH -6 :we 1•=20' date 3142013 Q 4 Q4 440 430 420 410 400 J z_ - W m 1- J. 0 O N C•1 an 0 O N WALL EXISTING GRADE AT TOP OF WALL RW -1L FINISHED GRADE AT BASE OF WALL 3-u0+20 410 400 390 380 370 360 305 SF MODULAR BLOCK WALL 100 LF CHAINLINK FENCE 51+00 WALL RW -2L EXISTING GRADE AT BASE OF WALL FINISHED GRADE AT TOP OF WALL 35S93+2 0 115 SF MODULAR BLOCK WALL 38 LF CHAINLINK FENCE 410 400 390 380 370 360 54+050 PUBLIC WORKS DEPT. -ENGI N EERING-STREETS-WATER-SEWER-PARKS-BUI LDI NG - am ds:mn.d dram checked p,dlae9 Wei dir add nxno 440 290 430 280 420 270 410 260 400 250 51+6P0 2413+00 310 300 290 280 270 260 WALL RW -3L TOP OF SIDEWALK TOP OF WALL EXISTING GRADE AT BASE OF WALL WILO 170 SF MODULAR BLOCK WALL 54 LF HANDRAILING WALL RW -3R 250 SF MODULAR BLOCK WALL 70 LF CHAINLINK FENCE 290 280 270 260 250 64+040 21+40 CH2MHILL, 62+00 310 300 290 280 270 260 - ECEIVE 6 " 0412O' 11-' r II�MI-N I CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III RETAINING WALL ELEVATIONS 31 ## fo no RT -1 scale AO One revisions O daY 3/412013 410 400 390 380 370 360 430 420 410 400 390 N z W 03 1••• re L N N 0 + N CC 1— cc 0 0 N WALL RW -2R FINISHED GRADE AT TOP OF WALL TOP OF SIDEWALK TOP OF WALL EXISTING GRADE AT BASE OF WALL NORTH SIDE OF DRIVEWAY 165 SF MODULAR BLOCK WALL 40 LF CHAINLINK FENCE EXISTING GRADE AT BASE OF WALL 52+00 TOP OF SIDEWALK TOP OF WALL ALONG BACK OF SIDEWALK 700 SF REINFORCED CONC RETAININGI WALL 110 LF HANDRAILING WALL RW -1 R 53+00 a 1— 0 0 N 1- s0 0 cri N EXISTING GRADE AT BASE OF WALL Oe M M ;o 410 400 390 380 370 534.4i160 FINISHED GRADE AT TOP WALL o„ rs 340+20 + ar re z ALONG BACK OF SIDEWALK 575 SF REINFORCED CONC RETAINING WALL 133 LF HANDRAILING EXISTING GRADE AT BASE OF WALL SOUTH SIDE OF DRIVE*VAY 220 SF MODULAR BLOCa< WALL 42.5 LF CHAINLINK FENCE 51+00 PUBLIC WORKS DEPT. 1908 -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- tate designed grews checked ami ere Psi* fielbk no CHOW HILL® 430 420 410 400 390 380 CFIV Fi r I ,t'MI-N 1 CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE 111 RETAINING WALL ELEVATIONS 110 0Ye revisions 32 fik no RT -2 sole date 314/2013 1 GROUND LINE ELEVATION MODULAR BLOCK CUT WALL NTS TOP OF SIDEWALK ao. —. 25 _ • 0�a WORK LINE AT FACE OF BOTTOM BLOCK, SEE RETAINING WALL PROFILES FOR WALL GEOMETRY FINISH GRADE SEE ALIGNMENT AND PAVING PLANS GRADE AT BASE OF WALL (Th1 PV -1 THRU PV -11 ELEVATION WORK LINE AT FACE OF BOTTOM BLOCK, SEE RETAINING WALL PROFILES FOR WALL GEOMETRY EXISTING GROUND _ MO (1' Min) I✓10 (1' Min) MODULAR BLOCK FILL WALL WITH THICKENED EDGE SIDEWALK CHAINLINK FENCE OR HANDRAILING, PLACE PER WALL MANUFACTURER RECOMMENDAT ON CAP BLOCK LL O Q LL UNIT FILL SECTION 0 iEXIST GROUND LINE _ BACKFILL FOR STRUCTURAL EARTH WALL 6" DIA PERFORATED CORRUGATED POLYETHYLENE UNDERDRAIN PIPE, SEE NOTE 3 MIN. 6" CSBC UNDER FOOTING WHERE SEW TRAFFIC BARRIER IS CALLED FOR IN PLAN, REFER TO DETAILS ON DWG. RWD-2. CHAINLINK FENCE OR HANDRAILING, SEE NOTE 4 UNIT FILL .iainrArWIMNI����i,,,, jilk,. t i 2' h NTS NOTES: 1. BACKFILL FOR STRUCTURAL EARTH WALL SHALL BE "GRAVEL BACKFILL FOR WALLS". PV -1 THRU PV -11 2. ALLOW ROOM FOR TOPSOIL ON FINISH GRADE WHERE REQUIRED. 3. UNDERDRAIN PIPE REQUIRED FOR WALLS SHOWN IN RETAINING WALL TABLE. CONNECT UNDERDRAIN PIPES TO STORM SEWER SYSTEM AS SHOWN ON THE DRAINAGE AND UTILITY PLANS. SECTION BACKFILL FOR STRUCTURAL EARTH WALL 6" DIA PERFORATED CORRUGATED POLYETHYLENE UNDERDRAIN PIPE, SEE NOTE 3 MIN.6" CSBC UNDER FOOTING 4. WHERE FENCE OR HANDRAIL POST IS EMBEDDED IN SIDEWALK USING GROUT SLEEVES, PROVIDE #4 HORIZ. BAR HAIRPIN AROUND GROUT SLEEVE: resil 5. BASE OF MODULAR BLOCK WALL SHALL BE IN DENSE, NON—YIELDING FOUNDATION MATERIALS. EXCAVATE TO REMOVE ANY SOFT OR YIELDING AREAS AS REQUIRED TO REACH FIRM FOUNDATION AS APPROVED BY THE ENGINEER DURING CONSTRUCTION. BACKFILL AND COMPACT TO DENSE NON—YIELDING CONDITION WITH GRAVEL BACKFILL FOR WALLS. — 6„F PUBLIC WORKS DEPT, -ENGINEERING-STREETS-WATER-SEWER-PARKS-BUILDING- acre ,1* Reid bkno 6' — 0” MAX POST SPACING 4" MAX GAP 54" OR 22 1/8 TYP AT POST > BASES 3116 V CH2MHILL® TOP OF RETAINING WALL ALUM BASE PLATE l2" X 5" WIDE X 6" LONG W/4 GALV. STEEL RESIN SEE NOTE #6 BONDED ANCHORS (12" DIA. ANCHORS FOR 22" RAILING, 5,8" DIA ANCHORS FOR 54" RAILING) NOTES: 1. ALUMINUM PIPE RAILING WILL BE MADE OF 6063 T-6 ALUMINUM WITH AN OUTSIDE DIAMETER OF 1.9". 2. ALUMINUM PICKETS WILL HAVE AN OUTSIDE DIAMETER OF 0.84". 3. ALL WELDS WILL BE SMOOTH. 4• WALL THICKNESS OF RAILINGS SHALL BE SCH. 40. 5• PROVIDE EXPANSION JOINTS IN RAILING AT 40' MAX SPACING CONSISTING OF SLIP JOINTS WITH INTERNAL SLEEVES EXTENDING 2" BEYOND EACH SIDE OF JOINT. FASTEN SLEEVE TO ONE SIDE USING 3'B" SETSCREW. 6. AS AN ALTERNATIVE TO USING POST BASEPLATES, POSTS MAY BE ATTACHED USING 3" INSIDE DIA X 6" LONG PVC PIPE SLEEVES CAST INTO CONCRETE. FILL SLEEVE WITH NON—SHRINK GROUT PRIOR TO INSERTING POST. HAND RAILING N.T.S. CITY OF TUKWILA 40th - 42nd AVENUE SOUTH - PHASE III RETAINING WALL DETAILS <TYP PICKETS <TYP AT POSTS G 1 CEIVED JUL 07 2W, ..111 I t 1iPMFNT 33 \ � J file no RT -3 scale revisions dais 314/2013 1,