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HomeMy WebLinkAboutSEPA E97-0019 - CITY OF TUKWILA / PUBLIC WORKS - SOUTHGATE CREEK SMALL DRAINAGE PROJECTSSMALL DRAINAGE PROJECTS CULVERT & EMBANKMENT IMPROVEMENT AT SOUTHGATE CREEK MACADAM RD. & S. 135 ST. E97-0019 AFFIDAVIT I, 5 jA ML -6! O Notice of Public Hearing O Notice of Public Meeting O Board of Adjustment Agenda flBoard of Appeals Agenda Packet flPlanning Commission Agenda Packet Packet OShort Subdivision Agenda Packet LI Notice of Application for Shoreline Management Permit 0 Shoreline Management Permit OF DISTRIBUTION hereby declare that: Determination of Non- significance 0 Mitigated Determination of Nonsignificance Determination of Significance and Scoping Notice O Notice of Action 0 Official Notice was -maimed to each of the following •g,4R.?-A CIRAN Other Other addresses on Name of Project (' JN OF 10= I Signature File Number FA 1 ' 001 1 J "/1/41M CITY OF TUKWILA DETERMINATION OF NONSIGNIFICANCE (DNS) DESCRIPTION OF PROPOSAL: IMPROVEMENT TO CULVERT AND EMBANKMENT AT SOUTHGATE CREEK NEAR MACADAM RD AND S 135 ST. PROPONENT: PHIL FRASER LOCATION OF PROPOSAL, INCLUDING STREET ADDRESS, IF ANY: ADDRESS: 6200 SOUTHCENTER BL PARCEL NO: 359700-0282 SEC/TWN/RNG: LEAD AGENCY: CITY OF TUKWILA FILE NO: E97-0019 The City has determined that the proposal does not have a probable sianificant.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. *•*•k******•k•**** k*****•k•*****************•k*sir********************•******* k****:k•* This determination is final and signed this 1997. Steve Lancaster, Responsible Official City of Tukwila. (206) 431-3670 6300 Southcenter Boulevard Tukwila, WA 98188 2J (a day of 331/ Copies of the procedures for SERA appeals are available with the Department of Community Development. AFFIDAVIT 1, 66IL\j I A Mr1Mu-. Notice of Public Hearing fl Notice of Public Meeting OBoard of Adjustment Agenda Packet O Board of Appeals Agenda Packet LIPlanning Commission Agenda Packet f Short Subdivision Agenda Packet O Notice of Application for Shoreline Management Permit 0 Shoreline Management Permit OF DISTRIBUTION hereby declare that: 14k1Determination of Non- significance 0 Mitigated Determination of Nonsignificance Determination of Significance and Scoping Notice O Notice of Action Official Notice Other Other was mailed to each of the following addresses on (ii ARACHat Name of Project (Irr'lOF ��a04 Signature File Number 0019 CS) bANit 1'Ri 3 S 1-2'A 1-2' -97 • CITY OF TUKWILA NOTICE OF THRESHOLD DETERMINATION PROJECT: REPAIR OF BOX CULVERT AND EMBANKMENT ON SOUTHGATE CREEK, NEAR MACADAM RD AT S. 135 ST FILE NO.: E97-0019 Public Notice will be given whenever the City issues the following Determinations of Non -Significance (TMC 21.04.210): 1. There is another agency with jurisdiction. 2. There is a non-exempt (SEPA) demolition of structure or facility. 3. There is a non-exempt (SEPA) clearing or grading permit. 4. The DNS is issued following a request for early notice pursuant to WAC 197- 11-350(2). 5. A Mitigated DNS is issued. Public Notice will also be provided when: 6. The City issues a DS to commence scoping. 7. The City withdraws a DS pursuant to WAC 197-11-350(2). 8. When a draft EIS is available for public comment. 9. Whenever the City holds a public hearing pursuant to WAC 197-11-535. Method of Notice Notice shall be provided pursuant to the provisions contained in TMC 18.104.110 and TMC 18.104.120. The notice shall be attached to the posting boards on site that were installed with the notice of application. The notice shall also be mailed to the applicant, owners and tenants within 500 feet of the site, parties of record, agencies with jurisdiction (including Department of Ecology) and any tribe, agency or department with interest in the proposal. Further, notice for threshold determinations made for non -project actions shall be published in the Seattle Times. Notice Content The content of the notice shall be as provided in WAC 197-11-970 and WAC 197-11-980 (DNS and DS forms). DATE OF APPLICATION: NOTICE OF COMPLETE APPLICATION: NOTIVE OF APPLICATION: JUNE 9, 1997 JULY 3, 1997 JULY 14, 1997 CITY OF TUKWILA DEPARTMENT OF COMMUNITY DEVELOPMENT 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 AFFIDAVIT OF INSTALLATION AND POSTING OF PUBLIC INFORMATION SIGNS) State of Washington County of King City of Tukwila I Rod Steitzer (Print Name) understand that Section 18.104.110 of the Tukwila Municipal Code requires me to post the property no later than fourteen (14) days following the issuance of the Notice of Completeness. I certify that on 7/23/97 the Public Notice Board(s) in accordance with Section 18.104.110 and other applicable guidelines were posted on the property located at Southgate Creek Crossing so as to be clearly seen from each right -of -way providing primary vehicular access to the property for application file number 96-DRO2 Affiant (Applicant Si SUBSCRIBED AND SWORN to before me this dday of JtL , 19 eT7 • a _. • NOTAR ' UnBLICC in�and for the State of WashingtonCO.residing at 1" Ll.e.0 _ _ _ _ASO , bOA i1 iY�.e. ( My commission expires on %-q • To: From: Date: Re: • aL1J% �li�lcwllla epartment of Community Development Steve Lancaster Michael Jenk' July 23, 1997 E97-0019, SEPA review of application by City of Tukwila Public Works Department for improvement of culvert and embankment, at Southgate Creek, near Macadam Road and S. 135th St. MEMORANDUM John W. Rants, Mayor Steve Lancaster, Director Project Description: This SEPA review is for a proposal to extend a box culvert and regrade an embankment due to failure of a culvert end. The proposed development will include stabilization of the embankment by extending the culvert 15 feet and reducing its slope from 1:1 to approximately 2:1. Work will take place over Southgate Creek, near Macadam Rd and S. 135th Streets. Agencies with jurisdiction: Department of Fisheries Comments to SEPA checklist: Pg. 3, section B(1)(d): Maximum slope is currently 1:1, or 100%. 100 cubic yards of fill will be required to stabilize slopes. Pg. 4, section 3: Project is along Southgate Creek, flowing to Duwamish River. Temporary Creek diversion will be required. Pg. 6, section 5: Project is not within a migration route. Pg. 10, section 14: Project may impact pedestrian use of Macadam Ave. Summary of Primary Impacts: • Earth Site has a 100% slope, with glacial till soils. Project will require 100 cubic yards of gravel fill borrowed from WSDOT for slope stabilization. Native soils will be used where appropriate, as determined by inspector. Approximately .05 acres will be cleared, comprised of blackberry bushes and grasses. Silt fencing, plastic covering, straw bales will be used by Engineer to control or reduce erosion. Hydroseed will be planted in restored areas. An HPA permit issrequired for work in this area. 6300 Southcenter Boulevard Suite #100 ° Tukwila, Washington 98188 ° (206) 431-3670 0 Fax (206) 431-3665 E97-0019 SEPA Checklist - City of Tukwila Public Works Southgate Creek at Macadam Rd./S. 135th July 23, 1997 • • Air Exhaust from construction vehicles and dust may occur during construction. • Water Project will take place over Southgate. Creek, which flows into the Duwamish River. Project is to repair and upgrade existing City of Tukwila drainage system, with no modifications to collection/runoff or disposal system. Project requires an HPA permit from Department of Fisheries. Culvert extension will require filling of about 15 feet of stream, affecting 75 square feet of surface waters. Temporary creek diversions around project area will be required. Late summer flows will be minor, with sandbag dams, diversion pipes or a portable pump placed upstream of culvert replacements to assist in temporary water diversion process. Project is not in a 100 year flood plain. Best Management Practices (BMP's) will be used to prevent sediment transport into drainage and conveyance systems • Plants Project may include the removal of blackberry bushes and grasses, with Hydroseeding in disturbed areas to follow. No known endangered species are on site. • Animals No known species or migration routes nearby. • Energy/Natural Resources Gasoline or other fuels may be used for machinery during construction and semi-annual maintenance. • Environmental Health Some short term noise will be generated during construction time period, lasting between 7:00 a.m. and 6:00 p.m. No long term noise impacts are anticipated. • Land/Shoreline Use Project will be generally located in the right-of-way, but surrounding properties are zoned Commercial/Light Industrial (C/LI) and Low Density Residential (LDR). No structures will be demolished. Project is located within a Class 1 and Class 3 Watercourse and in a Class 3 sensitive slope area. • Housing No housing is proposed nor will development reduce housing. E97-0019 SEPA Checklist - City of Tukwila Public Works Southgate Creek at Macadam Rd./S. 135th July 23, 1997 • • • Aesthetics No structures are proposed. • Light and Glare No impacts. • Recreation No impacts. • Historic/Cultural Preservation No known places or landmarks. • Transportation Project directly impacts Tukwila right-of-way. no parking will be required nor will new streets or improvements to roads be created. Project may impact pedestrian route along Macadam Ave. • Public Services Proposed development will not impact or require specific public services. • Utilities No impact Recommendations: DNS State of Washington DEPARTMENT OF FISH AND WILDLIFE Mailing Address: 600 Capitol Way N • Olympia, WA 98501-1091 • (360) 902-2200, TDD (360) 902-2207 Main Office Location: Natural Resources Building • 1111 Washington Street SE • Olympia, WA RECEIVED JUL 2 3 1997 TUKWILA PUBLIC WORKS July 21,1997 Mr. Phil Fraser City of Tukwila 6300 Southcenter Blvd. Tukwila, Washington 98188 SUBJECT: Hydraulic Project Application- Culvert Extension- Southgate Creek, Tributary to the Duwamish River in Section 15, Township 23 North, Range 04 East , WRIA No. 09.0001, WDFW Control No. 00-D0722-01. Dear Mr. Fraser: The Washington Department of Fish and Wildlife (WDFW) received the above - referenced Hydraulic Project Application on July 17, 1997, but we are unable to complete processing at this time for the following reason: State Environmental Policy Act (SEPA) - Compliance with SEPA is required by law prior to issuance of the Hydraulic Project Approval. Please contact your local city or county planning departmentfor information regarding SEPA procedures. Once the SEPA process has been completed, please provide me with a written copy ofhat determination so that we can begin processing your application. As you requested, I have enclosed draft provisions that may appear in the Hydraulic Project Approval and could be subject to change. If you have any questions regarding the status of your application, contact me at the Region 4 office at (206) 775-1311, ext. 107. We appreciate your cooperation in our efforts to protect, perpetuate, and manage the fish and wildlife resources for the state of Washington. Sincerely, Philip Schneider Area Habitat Biologist Enclosure cc: WDFW, Olympia Date: 21 -Jul -97 09:17:15 From: MICHAEL -J (MICHAEL alKINS) To: PHIL Copies -to: BRIAN,JACK Subject: SEPA for 1997 public works project Message -id: 1B29D33301000000 Application -name: MHS • Phil: Based on our conversation this morning, what you need to do to your SEPA application is revise it for only those projects that kick -in SEPA. As you may know, SEPA is triggered when 500 cu yards of earth is moved or there is work on a watercourse where an HPA permit woul be required. For the 8 projects that are presented in the 1997 small drainage project application, it would look like only projects 4 and 7 would trigger SEPA, based on the criteria listed above. Since project number 4 has been dropped based on our earlier conversations, it would appear that only project number 7 would trigger 7. This is based on the fact that an HPA permit is required. To ensure the accuracy of this determination, please do a quick check of this criteria against the projects, specifically the Tukwila School project. Please revise the checklist with supporting information, make sure that the supplemental part of the application is completed (since it was not the first time), post the signs and return an afffidavit of posting. Then I will finish my end of things, hopefully by Friday... MJ Date: 21 -Jul -97 11:04 From: GARY-SCHULZ (GARY SHULZ) To: MICHAEL -J Subject: Triangle Project -Watercourse Rating. Application -name: MHS Message -id: 5342D33301DEDEDE • Michael - per our conversation this morning, the rating for Watercourse 15-1 along 131st Place was rated as if the flow is north to south. However, I'm pretty sure it is the opposite and that would make the rating on the left banking, facing north, a Type 2 watercourse with a standard buffer of 35 feet. This is a correction to our watercourse inventory data and my comments for the March 1997 pre -application. Thanx for bringing this to my attention! Gary Date: 21 -Jul -97 09:28 From: GARY-SCHULZ (GARY IULZ) To: MICHAEL -J Copies -to: PHIL Subject: RE: SEPA for 1997 public works project Application -name: MHS Message -id: A92BD33301DEDEDE In -reply -to: 1 B29D33301000000 • >Date: 21 -Jul -97 09:17 >From: MICHAEL -J (MICHAEL JENKINS) >To: GARY-SCHULZ (GARY SCHULZ) >Subject: SEPA for 1997 public works project >Phil: Based on our conversation this morning, what you need to do to >your SEPA application is revise it for only those projects that kick -in >SEPA. As you may know, SEPA is triggered when 500 cu yards of earth is >moved or there is work on a watercourse where an HPA permit woul be >required. For the 8 projects that are presented in the 1997 small >drainage project application, it would look like only projects 4 and 7 >would trigger SEPA, based on the criteria listed above. Since project >number 4 has been dropped based on our earlier conversations, it would >appear that only project number 7 would trigger 7. This is based on the >fact that an HPA permit is required. To ensure the accuracy of this >determination, please do a quick check of this criteria against the >projects, specifically the Tukwila School project. >Please revise the checklist with supporting information, make sure that >the supplemental part of the application is completed (since it was not >the first time), post the signs and return an afffidavit of posting. >Then I will finish my end of things, hopefully by Friday... >MJ Hi Michael and Phil! First, the reason for SEPA is work in a water of the State or "lands covered by water" There is some unresolved question about all critical or sensitive area work triggering SEPA. But thats not what we are currently doing. Second, Phil I need to talk to you about Road no. 2 project above Denny's. The need to bury the pipe, tree removal, a shorter route to connect to drain system??? Can we talk today? gary • • MEMORANDUM TO: Michael Jenkins, Assistant Planner FROM: Gary Schulz, Urban Environmentalist DATE: July 18, 1997 RE: Environmental Review for 1997 Small Drainage Improvements. I have reviewed the SEPA checklist and visited the project sites. Projects - Road no.4 and Road no.7 are the only work proposed in sensitive area "watercourses". After our on-site meeting with Fisheries Biologist, Phil Schneider, I understand the Road no.4 project in Riverton Creek will be postponed to next year's schedule. I have comments for only two of the eight projects, no.2 and no.7. The other projects do not present any sensitive area regulation issues. It appears that the Road no.4 project is the only one that would need to be reviewed under SEPA because it involves "lands covered by water" or working within the Ordinary High Water Mark. 1) The Road no.2 project occurs on a sensitive slope above Macadam Road. The project is exempt from the Tree Regulations -TMC 18.54 because it is within City right-of-way. However, is still subject to the standards for sensitive area slopes. The slope is very steep and Driscoll pipe should be installed on the surface to avoid trenching disturbance and tree removal. Trees removed from this project will need to be replaced with native species (TMC 18.45.080 E.3.) Erosion and stabilization protection will be included in the plans. 2) The Road no.7 project work occurs in a branch of Southgate Creek and will have some mitigation plantings to restore disturbance to the channel banks. Native shrub plantings or cuttings will help with erosion control and meet the requirements of Fisheries' Hydraulic Project Approval (HPA) permit and the standards of the City's SAO. If you have questions feel free to contact me. cc: Steve Lancaster, DCD Director Brian Shelton, City Engineer Phil Fraser, Senior Engineer Nelson Davis, KPG Date: 17 -Jul -97 09:04:27 From: PHIL (PHIL FRASER) • To: MICHAEL-J,BRIAN,PHIL,TED-FREEMIRE,JOHN-H Subject: Small Dr. Project: 34th Culvert - Fish & Wild Life Message -id: 1 BEOCD3301000000 Application -name: MHS Dear Michael - • On 7/15/97 John Howat, Phil Fraser and Gary S. met with Phil Schneider of State Fish and Wildlife on the two stream crossing projects for the Small Drainage Projects to determine conditions of HPA applications by the State: Project #7: Culvert crossing at Macadam Rd./central branch of Southgate Creek (Project #7) - no fish shocked. Phil S. said planting mitigations would be prescribed by HPA which would be issued within next 1 to 2 weeks. For Project #4 the 34th Ave S. Culvert crossing the west branch of Riverton Creek at S 128th Street, the shocking revealed cut-throat trout on BOTH sides of the culvert crossing! Phil said a larger pipe, flatter and 5 to 6 foot high series of steps allowing fish passage would be required. This would add a significant cost to the project. After the meeting with Phil S., I discussed this input from the State with Brian. From our discussion, the decision was made to move Project #4 - the 34th Ave S. project - to '98 Small Drain Projects next year and drop it from this year's program for added budget and planning commitments next year. (John Howat considers that the 34th Culvert will not fail within the coming year.) Requested is that the environmental process be expedited recognizing the above changes in scope to the Small Drainage Projects. I have left a copy of the HPA Project Application provided for Phil S. in the field for your documentation only for Project #7 (Southgate Cr./S 135th) which is moving ahead with this years projects. If you have any questions get back to me right away. Phil July 17, 1997 • City of Tukwila John W. Rants, Mayor Department of Community Development Steve Lancaster, Director NOTICE OF COMPLETE APPLICATION Phil Fraser City of Tukwila Public Works Department 6300 Southcenter Blvd., Suite 100 Tukwila, WA 98188 RE: SEPA Application for 1997 Public Works Small Drainage Projects, E97-0019 Dear Mr. Fraser: Your SEPA application, on behalf of City of Tukwila, for the 1997 Public Works Small Drainage Projects, has been found to be complete on July 17, 1997 for the purposes of meeting state mandated time requirements. The project has been assigned to Michael Jenkins. The next step is for you to install the notice boards near each of the project sites within 14 days of the date of this letter. You received information on how to install the signs with your application packet. If you need another set of those instructions, you may obtain them at the Department of Community Development (DCD). Also, you must obtain a laminated copy of the Notice of Application to post on the board. This notice is also available at DCD. After installing the sign with the laminated notice, you need to return the signed Affidavit of Posting to the our office. This determination of complete application does not preclude the ability of the City to require that you submit additional plans or information, if in our estimation such information is necessary to ensure the project meets the substantive requirements of the City or to complete the review process. I will be contacting you soon to discuss this project. If you wish to speak to me sooner, feel free to call me at 431-3685. Sincerely, Michael Jenkins Assistant Planner cc: Reviewing City Departments c:\msofce...sepa\9719comp.doc 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431-3670 • Fax (206)4313665 • • Control No. Epic File No. E97 - 0019 Fee: Receipt No. ENVIRONMENTAL CHECKLIST A. BACKGROUND 1. Name of proposed project, if applicable: 1997 Small Drainage Projects - Road no.7. 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 433-0179; Phil Fraser 4. Date checklist prepared: June, 25 1997 5. Agency requesting checklist City of Tukwila 6. Proposed timing or schedule (including phasing, if applicable): The proposed project is scheduled to be constructed during the dry season, in August and September, 1997. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. No future expansion is planned. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. None known. 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. None known. Page 1 • • ENVIRONMENTAL CHECKLIST 10. List any government approvals or permits that will be needed for your proposal. None known. 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. Section E requires a complete description of the objectives and alternates of your proposal and should not be summarized here. A small drainage project identified by the City of Tukwila public works and maintenance staff as highest priority based on maintenance needs, public nuisance, and potential damage to adjacent properties. The project is briefly described below and identified on the attached Plans: Road no.7 - Southgate Creek crossing at Macadam Road: Portions of culvert end and rip rap at outlet are failing which support Macadam Road. Proposal is to extend culvert about 15 feet and regrade embankment to a 2:1 slope. (HPA is required by state fish and wildlife) Nine copies of the preliminary plans are attached for review. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The project site is located at Southgate Creek Crossing at Macadam Road (at approximately S. 135th St.) A location map is included on Sheet 1 of the attached Plan set. 13. Does the proposal lie within an area designated on the City's Comprehensive Land Use Policy Plan Map as environmentally sensitive? Yes, Southgate Ceek. Page 2 ENVIRONMENTAL CHECIPST B. ENVIRONMENTAL ELEMENTS 1. Earth a. General description of the site (circle one): Flat, rolling, hilly, steep slopes, mountainous, other rolling b. What is the steepest slope on the site (approximate percent slope)? The maximum slope is approximately 100%. c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. Glacial till soils. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. There is no known history of unstable soils; however, the following project is intended to proactively stablize oversteepened embankments which are of concern to City maintenance crews: Road no.7 - Macadam Road / Southgate Creek Box Culvert: Culvert end and riprap which support Macadam road are failing. Proposal is to stablize embankment by means of a culvert extension and reducing slope 2:1 from its current 1:1. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. Trench excavation and backfill to match existing grades will be performed on the project. Road no.7 will require additiional fill to stabilize oversteepened slopes. We have budgeted approximately 100 cubic yards of imported WSDOT gravel borrow for the project for slope stabilization fill. Native soils will be used in lieu of import trench backfill where determined suitable by the inspector. f. Could erosion occur as a result of clearing, construction,or use? If so, generally describe. Yes, approximately 0.05 acres will be cleared and graded for this project. Construction will be completed during the dry late summer season using appropriate erosion prevention technques and minimizing disturbed areas. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or building). No new impervious surface is proposed. Page 3 • • ENVIRONMENTAL CHECKLIST h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Appropriate Best Managment Practices (BMP) such as silt fencing, plastic covering, straw bale check dams and routing flows around or through construction areas will be used during construction as directed by the Engineer. Disturbed areas will be restored with hydroseed and appropriate plantings required by HPA following construction. 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? If any, generally describe and give approximate quantities if known. Exhaust from the construction vehicles and dust will be in the air only during construction. b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. No. c. Proposed measures to reduce or control emissions or other impacts to air, if any: None. 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. Project no.7 is along Southgate Creek which flows to the Duwamish River. 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. Yes, Project no.7 is within the described waters, see page 9 for attached plans. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. Culvert extension will require filling of about 15 feet of stream for the project, totaling about 75 square feet of surface waters. Fill material will be from a WSDOT certified source for gravel borrow. Page 4 ENVIRONMENTAL CHECKLIST 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities, if known. Road no.7 will require temporary diversion of creek flows around the project area for Southgate Creek. Late summer flows are minor and will be accomplished by means of a sandbag dam and a diversion pipe through the construction area, or a portable centrifugal pump placed upstream of the culvert replacement / extension. 5) Does the proposal lie within a 100 year floodplain? 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. No. 2) Describe waste materials that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals...; agricultural; etc.) Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. N/A. c. Water Runoff (including storm water): 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. This project is a maintenance repair and upgrade of the existing City of Tukwila drainage system. No modifications to current collection and disposal of runoff will occur. 2) Could waste materials enter ground or surface waters? If so, generally describe. No. d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: Appropriate BMPs will be installed to prevent sediment transport into existing drainage courses and conveyance systems. Page 5 ENVIRONMENTAL CHECKLIST 4. Plants a. Check or circle types of vegetation found on the site: b. What kind and amount of vegetation will be removed or altered? Approximately 0.05 acres will be cleared. This will include blackberries and grasses on road no. 7. c. List threatened or endangered species known to be on or near the site. None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: All disturbed areas will be hydroseeded folowing construction. 5. Animals a. Circle any birds or animals which have been observed on or near the site or are known to be on or near the site: Birds: Mammals: songbirds Fish: Other: b. List any threatened or endangered species known to be on or near the site. None. c. Is the site part of a migration route? If so, explain. Not part of migration route. d. Proposed measures to preserve or enhance wildlife, if any: N/A Page 6 crop or grain x deciduous tree: alder, maple, cottonwood, other evergreen tree: fir, cedar, pine, other x shrubs, blackberry x grass pasture wet soil plants water plants x other types of vegetation, grasses, lawn b. What kind and amount of vegetation will be removed or altered? Approximately 0.05 acres will be cleared. This will include blackberries and grasses on road no. 7. c. List threatened or endangered species known to be on or near the site. None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: All disturbed areas will be hydroseeded folowing construction. 5. Animals a. Circle any birds or animals which have been observed on or near the site or are known to be on or near the site: Birds: Mammals: songbirds Fish: Other: b. List any threatened or endangered species known to be on or near the site. None. c. Is the site part of a migration route? If so, explain. Not part of migration route. d. Proposed measures to preserve or enhance wildlife, if any: N/A Page 6 ENVIRONMENTAL CHECKLIST 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. The completed project will not require any energy. Small amounts of gasoline and/or diesel fuels will be used in equipment during semi-annual cleaning of the project. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. No. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: None. 7. Environmental Health a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. No. 1) Describe special emergency services that might be required. None. 2) Proposed measures to reduce or control environmental health hazards, if any: N/A. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? N/A 2) What types and levels of noise would be created by or associated with the project on a short-term or long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. Short term impacts will be noise from construction operation between hours of 7:OOam and 6:OOpm for the duration of the construction. No long-term impacts are anticipated. Page 7 • • ENVIRONMENTAL CHECKLIST 3) Proposed measures to reduce or control noise impacts, if any: Construction equipment will be equipped with mufflers and all operations will be in accordance with any City of Tukwila noise ordinances. 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? This project lies both within public right of way and private property and requires a license to construct. b. Has the site been used for agriculture? If so, describe. No. c. Describe any structures on the site. None. d. Will any structures be demolished? If so, what? No. e. What is the current zoning classification of the site? City right of way and C / LI & LDR. f. What is the current comprehensive plan designation of the site? City right of way and C / LI & LDR. g. If applicable, what is the current shoreline master program designation of the site? N/A h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. Not known. i. Approximately how many people would reside or work in the completed project? None. j. Approximately how many people would the completed project displace? None. k. Proposed measures to avoid or reduce displacement impacts, if any: N/A Page 8 • • ENVIRONMENTAL CHECKLIST L Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: N/A 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing? None. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. None. c. Proposed measures to reduce or control housing impacts, if any: N/A 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? No new building structures are proposed. 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? None. 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 light or glare may affect your proposal? None. Page 9 • ENVIRONMENTAL CHECKLIST d. Proposed measures to reduce or control light and glare impacts, if any: None. 12. Recreation a. What designed and informal recreational opportunities are in the immediate vicinity? Not known. b. Would the proposed project displace any existing recreational uses? If so, describe. No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: N/A 13. Historic and Cultural Preservation a. Are there any places or objects listed on, or proposed for, national, state, or local preservation registers known to be on or next to the site? If so, generally describe. No. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. None. c. Proposed measures to reduce or control impacts, if any: N/A 14. Transportation a. Idents public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. The site is on City of Tukwila public roadways. b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? No. c. How many parking spaces would the completed project have? How many would the project eliminate? None. Page 10 • ENVIRONMENTAL CHECKLIST d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private). No. e. Will the project use (or occur in the immediate vicinity oJ) water, rail, or air transportation? If so, generally describe. No. f How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. N/A g. Proposed measures to reduce or control transportation impacts, if any: N/A 15. Public Services a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. No. b. Proposed measures to reduce or control direct impacts on public services, if any. N/A 16. Utilities a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other. N/A b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. None. C. SIGNATURE The above answers are true and complete to the best of my knowled e I understand that the lead agency is relying on them to make its decision. Signature: �'�•' Date Submitted: Page 11 1997 SMALL DRAINAGE IMPROVEMENTS PROJECT NO. 96-DRO2 MAYOR JOHN W. RANTS DIRECTOR OF PUBLIC WORKS ROSS A. EARNST, P.E. CITY ENGINEER BRIAN SHELTON, P.E. SCHEDULE OF DRAWINGS SHEET N0. 2 3 4 5 6 7 ROAD NO. TITLE 1 2 2 3 4 5 8 6 9 7 10 8 11 8 COVER SHEET 14213 34TH AVENUE SOUTH 57TH AVENUE SOUTH/MACADAM ROAD SLOPE DRAIN SLOPE DRAIN DETAILS (NOT INCLUDED) SOUTH 130TH STREET (3500 BLOCK) 34TH AVENUE SOUTH CULVERT REPLACEMENT SOUTH 124TH STREET/51ST AVENUE SOUTH DRAINAGE IMPROVEMENTS 32ND AVENUE SOUTH /SOUTH 132ND STREET SOUTHGATE CREEK CROSSING PLAN AND PROFILE TYPICAL SECTIONS, PLAN AND PROFILE P UBLIC WORKS DBP T. • ENGINEERING * STREETS • WATER • SEWER • BUILDING * CITY COUNCIL JIM HAGGERTON, PRESIDENT PAM CARTER JOE DUFFIE ALLAN EKBERG JOAN HERNANDEZ PAMELA LINDER STEVE MULLET LEGEND EXISTING: oa GV • FH O TMH o PP ® MON O SMI -1 ® WM ❑ CB PROPOSED: THICKENED EDGE GATE VALVE FIRE HYDRANT TELEPHONE MANHOLE POWER POLE MONUMENT SANITARY SEWER WATER METER CATCH BASIN JUNCTION BOX THICKENED EDGE PAVEMENT REPAIR CATCH BASIN STORM DRAIN PIPE RECEIVED CITY OF TUKWILA JUN 2 7 9097 PERMIT CENTER field bk no Architecture Landscape Iretdteetnr• Orli Engineering Urban Design 50% REVIEW SUBMITTAL 1997 SMALL DRAINAGE COVER SHEET revisions I I file 110 706C0V0ldw scale AS SHOWN date 6/25/97 J 14229 BM — TOP OF EXISTING FIRE HYDRANT ELEV 100.00 ACP CLASS B FOR EDGE RESTORATION, SEE DETAIL, THIS SHEET ASPHALT THICKENED EDGE DETAIL ACP THICKENED EDGE • CRUSHED SURFACING TOP COURSE --MST GROUND EXIST ACP PAVEMENT OR COMPACTED SU3CRADE EDGE RESTORATION DETAILS 14205 0 5 10 20 40 60 SCALE: 1" = 20' I EXPIRES. 7/Z2/96 'CONSTRUCTION NOTES IO REMOVE AND REPLACE FENCE AS NECESSARY TO INSTALL STORM DRAINAGE (O STA 12+63 TO STA 14+27, 9.5' LT, INSTALL 164 IF THICKENED EDGE ALONG EXISTING EDGE OF PAVEMENT, SEE DETAILS, THIS SHEET. STA 14+50 TO STA 15+55, 9.5' LT, INSTALL 105 IF OF THICKENED EDGE ALONG EXISTING EDGE OF PAVEMENT, SEE DETAILS, THIS SHEET. DRAINAGE NOTES Q1 STA 15+00.5, 8.5' LT, INSTALL CATCH BASIN TYPE II ON EXISTING STORM DRAIN UNE. FIELD VERIFY EXACT LOCATION OF STORM DRAIN UNE. RIM = 93.5, IE = 87.34. Q2 STA 13+88.0, 8.5' LT, INSTALL CATCH BASIN TYPE II AND 110 IF OF 12" 0 STORM DRAIN PIPE, SLOPE = 2.0x CONNECT TO NEW CATCH BASIN, STA 15+00.5, 8.5' LT. RIM = 94.5, IE = 89.54. STA 12+63.0, 8.5' LT, INSTALL CATCH BASIN TYPE I AND 121 IF OF 12" 0 STORM DRAIN PIPE, SLOPE = 2.07G CONNECT TO NEW CATCH BASIN, STA 13+88.0, 8.5' LT. RIM = 96.0, IE = 91.96. STA 12+63.0, 17.4' LT, INSTALL CATCH BASIN TYPE 1 AND 9 LF OF 12" 0 STORM DRAIN PIPE, SLOPE = 2.0t CONNECT TO NEW CATCH BASIN. STA 12+63.0, 8.5' LT. RIM = 94.8, IE = 92.14. © STA 12+63.0, 22.4' LT, INSTALL CATCH BASIN •TYPE I AND 5 LF OF 12" 0 STORM DRAIN PIPE, SLOPE = 2.07G CONNECT TO NEW CATCH BASIN. STA 12+63.0, 17.4' LT. SET GRATE 0.2' BELOW DOSING GROUND ELEVATION. IE = 92.24. QUANTITIES SEE 50% COST ESTIMATES RECEIVED CITY OF TUKWILA JUN 271997 PERMIT CENTER PUBLIC' WORKS DBP T. • ENGINEERING * STREETS' WATER+ SEWER • BUILDING + dengue' drain checked Pro] enn Proldir field bk no by N.D MLM PJG date 6/97 6/97 6/97 ICIPC Architecture landarepe Architecture Carl" logineering oreen Design 50% REVIEW SUBMITTAL 1997 SMALL DRAINAGE ROAD NO. 1 14213 34TH AVENUE SOUTH random 2 II / file no 7I6IPLt.OWG Stale AS SHOWN date 6/7/97 SCALE: 1" = 20' 1000 1000 EGIN 50' RADIUS p BEND IN PIPE I.E. 897.5 12.0 SD. ..... ...END 50' RADIUS . 12 LF BEND IN PPE S=23.3% LE. 889.8 2 CONSTRUCTION NOTES INSTALL CONCRETE INLET AT DOSING 12" PVC PIPE OUTLET, RIM 981.0, I.E. 978.8- OUT(SW). REMOVE 12 LF OF EXISTING 1/2 ROUND 12" PVC PIPE AND INSTALL 12 IF 8'0 STORM PIPE. () INSTALL TYPE II CATCH BASIN AND 95 LF OF 12'0 STORM PIPE. RIM 977.2, I.E. 975.0-8" IN(NE), LE. 969.5-12" OUT(S). 0 INSTALL TYPE 1 CATCH BASIN AND 26 LF 12'0 STORM PIPE, T.O.G. 960.7, LE. 951.5-12" IN(N), LE. 958.4-4' IN(SW), LE. 951.3-12" OUT(S). REMOVE 12 LF EXISTING 4' PVC PIPE AND INSTALL 4 LF 4'0 PVC PIPE MATCH EXISTING PIPE INVERT AT WEST END, I.E. 960.3, AND CONNECT TO PROPOSED CATCH BASIN (NOTE 3). S=47.5 n INSTALL TYPE I CATCH BASIN AND 123 LF 12'0 STORM PIPE, T.O.G. 953.0, I.E 950.0-12" IN(N), I.E. 949.8-12" OUT(S). INSTALL ENERGY DISSIPATER STRUCTURE (SEE DETAIL) OVER EXISI1NG 27' STORM UNE. EX I.E -885.7 (W -E), I.E. 887.0-IN(N). QUANTITIES 1 SEE 50% COST ESTIMATES RECEIVED CITY OF TUKWILA JUN 2 7 1997 PERMIT CENTER o • \ VILA � z cy 008•`' P ZJBLIC WORKS DBP T. «ENGINEERING•STREETS•TRATER•SEVPER*BUILDING # by date —�,u,:m. "e°""°p° Urban Dmign 1997 SMALL DRAINAGE file oa 3 d NJD 5/97 50% REVIEW SUBMITTAL dram LLW 5/97IFENNIIM u � NIG poi e0; CID 5/975/97'°'�° 57TH ROAD N O . 2 . AVENUE SOUTH/MACADAM ROAD SLOPE DRAIN no i s p10jdir Beale AS SHOWN field bk n0 no date mom date 5/97 , CONNECT TO EXISTING CATCH BASIN SAVICUT, REMOVE, AND REPLACE EXISTING ASPHALT CONCRETE PAVEMENT (TP). INSTALL 206 LF OF 12" 0 STORM DRAIN PIPE. MATCH EXISTING INVERTS AT BOTH CATCH BASINS. S 130TH STREET (3500 BLOC() QUANTITIES SEE 50% COST ESTIMATES CONNECT TO COSTING CATCH BASIN 0 5 10 20 SCALE: 1" = 10' 1 ExPRE5. '7/22/96 30 1 1 RECEIVED CITY OF TUKWILA JUN 2 7 1997 PERMIT CENTER ..•••••••116 1='E.J113I,IC WORKS' 13_EPT. *ENGINEERING*STREETS*WATER*SEWER*BUILDING* dewed drawn checked by NJO MLM PJG date 6/97 6/97 6/97 poi em prof dir field bk no Fr..71PC4 Arelthecrtor• Lendscape Civil in Urban Design 50% REVIEW SUBMITTAL 1997 SMALL DRAINAGE ROAD NO. 3 S 130TH STREET (3500 BLOCK) date revisions file no 7163PLNIONG wale AS SHOWN date 6/17/97 110 100 IT! 0 5 10 20 SCALE: 1' = 10' 30 HYDROSEED ALL DISTURBED AREAS. TYP EXISTING. " PAVEMENT FINISHED (RADE... f -GRAVEL BORROW FILL,TYP • 90 110 100 LE. 94.3 90 0+50 5 128TH ST. CONSTRUCTION NOTES (i) REMOVE 50 LF 24.0 CMP AND REPLACE NATE 71 LF 24'0 SDP, S = 6.06X. ® SAWCUT AND REMOVE EXISTING PAVEMENT. RESTORE TO MATCH EXISTING PAVEMENT SECTION. 0) MATCH EXISTING CREEK GRADE, I.E. 98.6. BEVEL PIPE END TO MATCH SLOPE MATMATCHCH EXISTISLOPENG CREEK GRADE, LE 94.3. BEVEL PIPE END TO (5 REMOVE AND REPLACE EXISTING CONTROL BOX AND CONCRETE SLAB. ® PLACE 6' x 8' x 1' DEEP RIP RAP PROTECTION PAD. EXCAVATE AS REQUIRED TO MATCH TOP OF PAD 'MTH INVERT ELEVATION. PLACE FILTER FABRIC OVER SUBGRADE PRIOR TO PLACING RIP RAP. ® INSTALL 5' GRAVEL SHOULDER (4' DEPTH OF CSTC) ON EITHER SIDE OF EXISTING ROADWAY. QUANTITIES SEE 50% COST ESTIMATES RECEIVED CITY OF TUKWILA JUN 2 7 1997 PERMIT CENTER P ZJDLIC WORKS DRP T. «ENGINEERING* STREETS * WATER* SE W ER * BUILDING • b date 6/97 6/97 checked m 6/97 70 a, .dr • field bk KPC:' aeowc.ocme Landscape irehtteetare Chll Engineering Urban Dodge 50% REVIEW SUBMITTAL 1997 SMALL DRAINAGE ROAD NO. 4 34TH AVE S CULVERT REPLACEMENT date revisions 6 ` II file Ilo 7164PPRo3 scale AS SHOWN date 6/25/97 I EXISTING DRAINAGE PUDDLES EAVES EXISTING RESIDENCE 5023 S. 124TH STREET EXISTING MAILBOXES --\ EXISTING GRAVEL & ASPHALT SHOULDER EXISTING GRASS YARD. AQ" 7 --FLOW UNE Al‘ EL. = 100.65 ,eV` CatoLXISTING EDGE OF PAVEMENT �—r XI;TING GG UNE FLOW UN EXISTING WATER VALVES +' EXISTING FIRE HYDRANT R = 90.50' A= 1239'26' L = 19.99 T = 15.95 FLOW UNE EL = 100.55 N EXISTING GAS MAIN —/ EXISTING / EXISTING TYPE 2 SDMH GAS VALVE RIM = 100.00 NEW 12 IE (IN) = 97.30 (S) (OUT) = 97.30 (11) EXISTING WATER VALVE --IBM, ASSUMED ELEV. = 100.00 - moo 5 10 20 30 SCALE: 1" = 10' 1.9 CONSTRUCTKA NOTES 01 INSTALL NEW CATCH BASIN TYPE I. ROU = 99.86, 12' IE = 97.86. 02 INSTALL 38 LF DUCTILE IRON PIPE, 12' DIAMETER, S = 0.66%. ® INSTALL NEW CATCH BASIN TYPE 1 RIM = 100.20, 12' IE = 97.61. ® INSTALL 47 LF DUCTILE IRON PIPE, 12' DIAMETER, S = 0.66X ® TIE NEW 12' DUCTILE IRON PIPE INTO EXISTING TYPE 2 STORM DRAIN MANHOLE, IE = 97.30. © PROVIDE PAVEMENT PATCHING PER DETAIL, SHEET XX. 07 INSTALL 739 SQUARE YARDS NEW AC PAVEMENT PER DETAIL, SHEET XX. . ® INSTALL -109;UNEAR FEET NEW CURB & GUTTER PER PLAN, CROSS SECTION DETAIL, SHEET XX. CURB RADIUS, DELTA, LENGTH, AND TANGENT INFCRMATION ON PLAN IS TO FACE OF CURB. ® REGRADE EXISTING SHOULDER TO NEW CURB AND GUTTER, IMPORTING TOPSOIL AS NEEDED AND HYDROSEED. 10 SANCUT EXISTING PAVEMENT 0.25 FEET OUT FROM EXISTING FOGUNE. REMOVE EXISTING PAVEMENT ON OUTSIDE EDGE OF FOGUNE. QUANTITIES SEE 50% COST ESTIMATES RECEIVED CITY OF TUKWILA JUN 2 7 1997 PERMIT CENTER P ZJBLI C WO1 IC JD _OF) T. • ENGINEERING * STREETS * WATER* SEWER *BUILDING * designed drawn psi ens .proi dB by DMA DMA NJD date 6/97 6/97 6/97 field bk no - Archtbastare Ora Engineering Urban 50% REVIEW SUBMITTAL 1997 SMALL DRAINAGE ROAD NO. 5 S 124TH STREET/5IST AVENUE SOUTH DRAINAGE IMPROVEMENTS date revisions 7 u file no 71658AS0LDW0 Beale AS SHOWN date 06/25/97 S 132ND STREET 1111/110--3f— 0 5 10 20 SCALE: 1" = 10' 30 UBLIC WORKS DRP T. • ENGINEERING * STREETS • WATER * SEWER • BUILDING • deemed dram checked Pal en prof dir field bk no by NJD LLW PJG NJD date 6/97 6/97 6/97 6/97 . .ram ar. .,,m a'u tomeertag OrtIIM D 50% REVIEW SUBMITTAL CONSTRUCTION NOTES 0 EXTEND EXISTING 18' CONCRETE CULVERT 5 LF TO CONNECT TO NEW TYPE 2 C8. Q INSTALL TYPE 2 CB, 48' WITH FRAME AND GRATE AND 46' LF 18' DI SDP. Q REMOVE EXISTING C3 AND INSTALL YARD DRAW AND 12 LF 6' PVC DRAIN PIPE TO NEW CB. ® DIRECT EXISTING SWALE TO NEW YARD DRAIN. ® REMOVE EXISTING T,PE 1 CB AND INSTALL NEW TYPE I CB. ® SAWCUT AND REMOVE EXISTING PAVEMENT. RESTORE TO MATCH EXISTING PAVEMENT SECTION. O REMOVE 5 IF OF EXISTING 18' CONCRETE SDP AND PLUG AND ABANDON IN PLACE, 2 PLACES QUANTITIES SEE 507. COST EST1MATES RECEIVED CITY OF TUKWILA JUN 2 7 1997 PERMIT CENTER 1997 SMALL DRAINAGE ROAD NO 6. 32ND AVENUE S/S 132N[) STREET 8 n file no 7I6sHroa scale AS SHOWN date 6/97 .. ...... va.'"..,._L•..•...,.-.:.va..... j, j._n..�.�...:..,r—.. i0 70 `OUTj 04 TE CREEK..- • EDGE OF PAVEMENT EXIST GROUND /— FINISHED GRADE. HYDROSEED DISTURBED AREAS 4' CSTC SHOULDER —' 2 —11 MATCH EXIST 3' X 4' BOX CULVERT END. DOWEL #4 BARS BETWEEN OLD AND NEW TO PROVIDE MIN. 1' EMBEDMENT. —I TYPICAL SECTION NTS INSTALL REINFORCED CONCRETE BOX CULVERT AINGWAIlS PER WSDOT STD PLAN B--6. INSTALL 15 LF 3' X 4' REINFORCED CONCRETE SINGLE 60) CULVERT PER WSDOT STD. PLAN B -r. ` ij 1—� 0 5 10 20 SCALE: 1" = 10' 30 CONSTRUCTION NOTES () PLACE L10IT LOOSE RIP RAP MIN 2' ALL AROUND CULVERT END. DEPTH = 24' MIN. ;QUANTITIES SEE 50% COST 1 ESTIMATES RECEIVED CITY OF TUKWILA JUN 2 7 1997 PERMIT CENTER P ZJELIC WORKS DEPT. • ENGINEERING • STREETS • WATER • SEWER s BUILDING • designed dram checked Prol en Purl field bk no by NJD LLW PJG NJD date 5/97 5/97 5/97 5/97 IG' Landaoapa y chtte 'urs Q,n Magmearing Urban Design 50% REVIEW SUBMITTAL 1997 DRAINAGE PROJECTS ROAD ,NO. 7 SOUTHGATE CREEK CROSSING • 9 file 110 7167PPRO3 no date revisions scale AS SHOWN date s/97 J 176 GRAVEL FILLED PLAY AREA V/WOOD BORDER LAWN J66 SD14H',310 SDMH 259 RIM 1 72. 0' \' I E 167. 9' N, 'PVC I E 167. 8' NE, 8' CONC 1E 167.4' SE, 15' CONC If 167,8' NV, 1 CAbi�7"NC O M.1GO.9' IE 161 6' SE,l5' CDNC I E 163. 6'- 6, 12' CONC 1E 163. 6' ti.15' CONC- OO O 0174 TREE—"- LIN£ 190 180 170 4 L1NE=^' J ..._.._____ 176 162' 172.CDNC5 1' 0 5 10 20 40 SCALE: 1" = 20' 60 SDMH 18 -'•..160. b" IE 156,5' E,15' CONCH I E 158. 8'-. V, 12' CON I E 156. 9' 'IV, 15' CONC j2_'ONC Uri 16=1.60. 8' ` h 4 a0 190 180 160 g 5 � 150 tl�f ES{ P UBLIC WORKS DRPT. s �_ Z •ENGINEERING*STREETS•WATER•SEWER•BUILDING• vg - EXISTING GROUND, SEE GENERAL NOTE 3 • 167 LF 16' HDPE SOP S = 2.30X P.1 136 16" Hip co i /09 s 170 2' MIN _ : 160 COVER /6' 150 HORIZONTAL 1' = 20' VERTICAL 1' = 5' DRAINAGE NOTES 01 REMOVE AND REPLACE EXISITNG 12' CONCRETE SD PIPE AND CONNECT TO NEW MANHOLE 02 REMOVE EXISTING 15' CONCRETE SD AND CONNECT PROPOSED 16- HDPE SDP TO USING MANHOLE, RIM = 172.0, 16' HDPE SDP IE (SE) = 167.55. 03 REMOVE EASING 15' CONCRETE SD AND CONNECT PROPOSED 16' HDPE SDP TO EXISTING MANHOLE, 2 PLACES, RIM = 169.9, 16' SDP IE (SE) = 163.6, 16' HDPE SDP IE (NW) = 163.7. ® INSTALL TYPE 2 CB 48", RIM = 160.6. 16' HDPE SOP IE (NW) = 153.4, 16' SDP IE (E) = 153.3. ® REMOVE 167 LF OF EXISTING CONCRETE 15' SDP. INSTALL 167 LF OF NEW 16' HDPE SDP ON SAME UNE AND GRADE. ® REMOVE 136 LF OF EXISTING CONCRETE 15' SDP. INSTALL 136 LF OF NEW 16" HDPE SDP ON SAME UNE AND GRADE. 07 SEE NOTE ® , SHEET 3. GENERAL NOTES 1. CLEAR AND GRUB AREA ABOVE EXISTING STORM DRAIN UNE INCLUDING IRE REMOVAL AS NECESSARY TO REMOVE AND REPLACE STORM DRAIN. 2. PROVIDE TRENCH BEDDING AND BACKFILL PER DETAIL, SHEET 3. 3. FINISHED GRADES SHALL GENERALLY MATCH EXISTING GRADES. MAINTAIN ALL EXISTING DRAINAGE COURSES AND HYDROSEED ALL DISTURBED AREAS. RECEIVED CITY OF TUKWILA JUN 2 7 1997 PERMIT CENTER Architecture a Architecture Civil reelheerIng Urban Design 100% REVIEW SUBMITTAL 1997 SMALL DRAINAGE ROAD NO. 8 PLAN & PROFILE no date revisions I0 file no 706PPR02 scale AS SHOWN date 6/25/97 0 2 8 Y 3 HYDROSEED ALL DISTURBED AREAS EXIST GRASS :II II".±.±11=11=11=11=11= II UNDISTURBED SOIL 4' TOPSOIL SUITABLE NATIVE BACKFILL OR GRAVEL BORROW GRAVEL BACKF1LL FOR PIPE BEDDING VARIES PIPE OD • TYPICAL TRENCH SECTION STORM DRAIN PIPE NTS H B 165 I M 150. 0' E 147.4' E, 15' CONC E 147.9' S, 8' CONC E 147.5' 01,15' CONC NO STRUCTURE FOUND 25' TELEVi SI ON JUNCTION BOX 25' — CONC. WALKWAY CURB & GUTTER / s9 z 160 0' IE 147.8' N.8' CONC IE 147.9' S.4' PVC ss 20' HI GH HEDGE/TREES SDMH 107 CB 370 RIM 152.1' IE 147.4' 1E 147.4' RI M 152. 0' I E 146. 8' N,12' CONC I E 146. 8' NE, 12' CONC 1E 146.8' SE. 12' CONC I E 1 46, 6' S. 1 8' CONC IE 146 7' NW, IS' CONC 0 5 10 20 40 60 SCALE: 1" = 20' RIM 152.2' IE 145.0' 5,8' I E 144. 9' E. 8' I E 145. 3' W, 8' CONC CONC PVC 160 2' MIN COVER 150 1.0.E ..i .:..._ 1' 11• _ (MIN) 140 150 ;29 LF 18SDP S= 0.72% 18' SDP S = 1.00% rn rn eco ,' 0 v 0 0 140 HORIZONTAL 1' = 20' VERTICAL 1' = 4' DRAINAGE NOTES ® FIELD LOCATE E7.ISTING BEND IN STORM UNE. CONSTRUCT NEW TYPE 2 CATCH BASIN AT EXISTING JUNCTION OF PIPES WITH SOUD UD, RIM = 152.3±, 16' IE (ti) = 147.19±, 18' IE (SE) = 146.94±. ® REGRADE AREA CO MINIMUM FINISHED GRADE = 151.00. IMPORT CRUSHED ROCK 'N EXISTING GRAVEL AREAS AND TOPSOIL IN EXISTING LANDSCAPED AREAS. ® INSTALL RISERS AND ADJUST FINISHED RIM AND GRATE ON EXISTING CATCH BASIN, NEW RIM ELEV = 150.90. ® REMOVE 109 LF OF EXISTING CONCRETE 15' SDP. INSTALL 109 LF OF NEW 16" HDPE SDP. ® REMOVE 29 LF OF EXISTING CONCRETE 15' SDP. INSTALL 29 LF OF NEW 18' SDP. ® REMOVE 24 IF OF EXISTING CONCRETE 18" SDP. INSTALL 24 LF OF NEW 18' SDP AND CONNECT TO EXOS11NG C8. REMOVE AND REINSTALL DOSING FENCE AS NEEDED TO COMPLETE PROJECT. ® REMOVE AND REPLACE EXISTING CEMENT CONCRETE SIDEWALK AND CURB AND GUTIER AS REQUIRED TO INSTALL PIPE. QUANTITIES SEE 50% COST ESTIMATES RECEIVED CITY OF TUKWILA JUN 271997 PERMIT CENTER R�yvi ci o P EJBLdC WORKS DEPT. •ENGINEERING*STREETS•WATER•SEWER*BUILDING• �a ?° °' by dais Kp .tet `"°°'cape `'�eetne ono eering Urban 1997 SMALL DRAINAGE 61e 1 II desired DUA 6/97 50% REVIEW SUBMITTAL d 6„7 II wed NJ1 6/97 pmj end ROAD N 0 . 8 TYPICAL SECTIONS, PLAN & PROFILE no 70641NO3 ADA di[ Neale AS SHOWN field bk no no date reYisi—ons dile 6/25/97