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HomeMy WebLinkAboutSEPA E97-0012 - CITY OF TUKWILA / PUBLIC WORKS - TRAIL #4 BANK SLOUGHOUTTRAIL #4 BANK SLOUGHOUT RESTORE SLOPE FAILURE OCCURING FROM STORMS A 62ND AVE S. RIGHT-OF-WAY E97-0012 MEMORANDUM TO: Phil Fraser FROM: Jack Pace RE: Trail #4 Rep SEPA Checklist DATE: May 16, 1997 After reviewing the proposed actions required to repair Trail #4 including regrading less than 100 cubic yards of soil, installation of a safety rail, installation of a debris barrier and hydroseeding the slope I find that the action is categorically exempt. Tukwila has established the exempt level for landfills and excavations at up to 500 cubic yards in TMC 21.04.110 (5). This exemption is not affected by the environmentally sensitive nature of the site according to TMC 21.04.300 (a). The Planning Division will close out the checklist file E97-0012. May 13, 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 6300 Southcenter Boulevard Suite 100 Tukwila, WA 98188 RE: Trail #4 Bank Sloughout E97-0012 Dear Mr. Fraser: Your application for regrading and reconstruction of a slope located in the unimproved 62nd Avenue South R -O -W north of 153rd Street has been found to be complete on May 13th for the purposes of meeting state mandated time requirements. The next step is for you to install the notice board on the site within 14 days of the date of this letter. If you need a 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 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. This notice of complete application applies only to the permits identified above. It is your responsibility to apply for and obtain all necessary permits issued by other agencies. If you have any questions please feel free to call me at 433-7141. Nora Gierloff Assistant Planner 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 4313670 • Fax (206) 431-3665 Envemental Checklist A. BACKGROUND 1. Name of proposed project, if applicable: Trail #4 Bank Sloughout 2. Name of applicant: City of Tukwila, Public Works Department 3. Address and phone number of applicant and contact person: • . Control No. Epic File No. -q7-0(71 Z- FFee Receipt No. U ( e_v p q dn,7 Z RECEIVED 6300 Southcenter Blvd., Tukwila, WA 98188 / (206) 433-0179 MAY 0 9 1997 Contact: Phil Fraser, Public Works Department COMMUNITY DEVELOPMENT Date checklist prepared: May 7, 1997 ELO PMENT 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 June and July, 1997. 7. 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 ycu 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. No other current proposed projects on the subject site/lot are know. 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 alternatives of your proposal and should not be summarized here. The project is proposed to restore a slope failure which occurred in the April, 1996 storms. Proposed measures include regrading to remove unstable soils, installation of a debris contaminant swale, relocation of an existing trail, installation of safety railing, and revegetation with an erosion control hydroseed mix. 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, 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 area lies in Section 23/23/4 approximately 100' north of the intersection of 62nd Avenue South and S 153'd Street in an unimproved portion of City of Tukwila 62nd Avenue S right-of-way. Page 1 ' TO BE COMPLETED BY APPLICANT • • EVALUATION FOR AGENCY USE ONLY B. ENVIRONMENTAL ELEMENTS 1. Earth a. General description of the site (circle one): Flat, rolling, hilly, steep slopes, mountainous, other b. What is the steepest slope on the site (approximate percent slope)? 100% c. What general types of soils are found on the site (for example, day, sand, gravel, peat, much)? if you know the classification of agricultural soils, specify them and note any prime farmland. Silty sand to sandy silt residuum (bedrock weathered to soil). Several outcroppings of sandstone bedrock were observed. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. Yes, a slide occurred in February, 1996. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. No filling is expected except for minor regrading of existing soils. f. Could erosion occur as a result of•clearing, construction or use: If so, generally describe. g. Yes, approximately 0.1 acre will be cleared and graded for this project. Construction will be completed during the dry late summer season using appropriate erosion prevention techniques and minimizing disturbed areas. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? None h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Alldisturbed areas will be revegetated with an erosion control hydroseed mix immediately after 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 five 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. Page 2 TO BE COMPLETED BY APPLICANT • 3. Water a. Surface: EVALUATION FOR AGENCY USE ONLY 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. No. 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. No. 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. None. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. No. 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 by withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities if know. No. 2) Describe waste material 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 (including quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. Page 3 • TO BE COMPLETED BY APPLICANT • • EVALUATION FOR AGENCY USE ONLY There are no formal drainage facilities in the project area. Flow is primarily sheet flow, which will continue following construction, however, the upslope trail will be graded to direct flow around the slope failure area. 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: A bonded fiber matrix hydroseed application will shed water while allowing vegetation to re establish in the cleared area. 4. Plants a. Check or circle types of vegetation found on the site: • X deciduous tree: alder, maple, aspen, other evergreen tree: fir, cedar, pine, other X shrubs X grass pasture crop or grain wet soil plants: cattail, buttercup, bulrush, skunk cabbage, other water plants: water lily, eelgrass, ,milfoil, other X other types of vegetation b. What kind and amount of vegetation will be removed or altered? Approximately 0.1 acre will be cleared. Maple, alder, blackberry, and weedy groundcover will be removed. A 48" diameter maple stump will be removed. 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: 'An erosion control seed mix will be used to vegetate the steep slope 5. Animals a. Circle any birds and animals which 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: b. List any threatened or endangered species known to be on or near the site. None. Page 4 • TO BE COMPLETED BY APPLICANT • EVALUATION FOR AGENCY USE ONLY c. Is the site part of a migration route? If so, explain. Not part of a migration route. d. Proposed measures to preserve or enhance wildlife, if any: N/A 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 or 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 a long-Oterm 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 the hours of 7:00 AM and 6:00 PM for the duration of the construction. No long-term impacts are anticipated. Page 5 ' TO BE COMPLETED BY APPLICANT • 3) Proposed measures to reduce or control noise impacts, if any: EVALUATION FOR AGENCY USE ONLY 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? The current site is an undeveloped City right-of-way for 62nd Avenue S. City of Tukwila Trail #4 runs through the site area. Neighboring properties are multi -family. b. Has the site been used for agriculture? If so, describe. No. c. Describe any structures on the site. None. d. WiII any structures be demolished? If so, what? No. e. What is the current zoning classification of the site? City right-of-way. f. What is the current comprehensive plan designation of the site? Not known. 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 know, however the slope is the site of a recent slide. 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 measure to avoid or reduce displacement impacts, if any: N/A I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: N/A Page 6 . TO BE COMPLETED BY APPLICANT • EVALUATION FOR AGENCY USE ONLY 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 product? What time of day would it mainly occur? None. b. Could Tight 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. d. Proposed measures to reduce or control Tight and glare impacts, if any: None. 12. Recreation a. What designated and informal recreational opportunities are in the immediate vicinity? Tukwila Trail #4. Page 7 TO BE COMPLETED BY APPLICANT • b. Would the proposed project displace any existing recreational uses? If so, describe. The trail will be slightly relocate to the west, the use will not change. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: EVALUATION FOR AGENCY USE ONLY 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 know t to be on or next to the site. None. 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. The site is accessed by 62nd Avenue South and S 153'r Street. b. Is 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. 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. WII the project use (or occur 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 by the completed project? If know, indicate when peak volumes would occur. N/A Page 8 TO BE COMPLETED BY APPLICANT • EVALUATION FOR AGENCY USE ONLY 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 services, telephone, sanitary sewer, septic system, other. N/A b. Describe the utilities that are proposed for the project, the utilities 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 knowledge. I understand that the lead agency is relying on them to .. ke itsecisiop. Signature: Date Submitted: S/ / PLEASE CONTINUE TO THE NEXT PAGE Page 9 CITY OF TUKWILA DEPARTMENT OF PUBLIC WORKS Trail #4 Bank Sloughout Repair Construction Cost Estimate May 6, 1997 KPQ. Architecture • Landscape Architecture • Civil Engineering • ,., ...!.;.:. • i••,:;;:.,:! ' u9it..::•,::: . Total::: -. . • ,., ,No:';'-:::'.:,. -..."- : , ,:., ..1. .;.;:1'. . em,, : *:: : • ' :$• - -Qtiantity: ,,..11riiti...! Cost•','i.-i:-!;: ••,. .: - Cost 1 Mobilization 1 LS $ 2,500.00 .$ 2,500 2 Temporary Water Pollution/Erosion Control 1 FA $ 1,000.00 $ 1,000 3 Clearing and Grubbing 1 LS $ 3,000.00 $ 3,000 4 Unclassified Excavation 1 LS 4,000.00 $ 4,000 5 Precast Concrete Barriers 110 LF 45.00 $ 4,950 6 Wood Chips for Trail Relocation 8 CY 100.00 $ 800 $ 7 Safety Rail 90 LF $ 30.002,700 8 Hydroseed 3500 SF 0.40 $ 1,400 9 Property Restoration 1 F 2,000.00 $ 2,000 Subtotal Sales Tax (8.2%) $ 20,350 1,669 • " • • • , - R: -T-UCTIoN:CosT, . -22,019;(: (—) • TRAIL NO. 4 BANK SLOUGHOUT PROJECT NO. 96-DRO1 (A) MAYOR JOHN W. RANTS DIRECTOR OF PUBLIC WORKS ROSS A. EARNST, P.E. CITY ENGINEER RON CAMERON, P.E. SCHEDULE SHEET NO. OF DRAWINGS TITLE 1 TITLE SHEET 2 DETAILS & SECTION 3 PLAN CITY COUNCIL PAM CARTER, PRESIDENT JOE DUFFIE JOAN HERNANDEZ ALLAN EKBERG STEVE MULLET JIM HAGGERTON PAMELA LINDER LEGEND EXISTING: • GV • FH O TMH -0- PP ® MON O SMH ® 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 OR OVERLAY CATCH BASIN STORM DRAIN PIPE RECEIVED MAY 0 9 1997 COMMUNITY DEVELOPMENT F UBLI C Tir®RK,S DEP • ENGINEERING * STREETS • WATER * SEINER «BUILDING • designed drawn checked Prof en pr0] dn' field bk no by NJO LLW PJG NJD date 10/96 10/96 10/96 10/96 IPQ Architecture r®a.mm Architecture aril Engineering When D.d`c 90% REVIEW SUBMITTAL TRAIL NO. 4 TITLE SHEET no date re,isions 3 file no 61SCOVOLDWO scale AS SHOWN date 10/96 E�t7-oo�2 FS1 oo42. END OF EXISTING HANDRAIL EDGE OF EXISTING TRAIL #4 `- Exist' NATURAL. GAS- MAIN FIELD LQl;ATE do PROTECT.._____._ .._._ TRAIL C — 150 » � N • 0 5 10 20 30 SCALE: 1" = 20' 0 N N 21 E 15,"56.00. WEST RIGHT—OF—WAY LINE 62ND AVENUE SOUTH ins; "4) RIGHT—OF—WE EAST RIGHT OF WAY UNE CONSTRUCTION NOTES 0 REMOVE EXISTING 48' MAPLE TREE. 20 REMOVE OVERSTEEPENED, SLUMPING SOILS & VEGETATION IN SHADED ▪ AREAS. Q CLEARRtVEGETATION & REGRADE TO A MAXIMUM SLOPE 1:1 (H:V) WITHIN THE UMITS SHOWN. STABILIZE WITH A BONDED FIBER MATRIX HYDROSEED APPLICATION PER THE SPECIFICATIONS. I ® INSTALL 110 LF OF CONCRETE BARRIER, TYPE 2, DEBRIS CONTAINMENT WALL PER STANDARD PLAN C-8, WSDOT STANDARD PLANS FOR ROAD, BRIDGE AND MUNICIPAL CONSTRUCTION. 0 RELOCATE EXISTING TRAIL 14 TWO FEET TO THE WEST. CLEAR EXISTING VEGETATION & PLACE NEW TRAIL SURFACING (WOOD CHIP/BARK MULCH) PER DETAIL SHEET 2. SLOPE 2X TO WEST AND PROVIDE POSITIVE DRAINAGE TO THE SOUTH. © INSTALL APPROXIMATELY 80 LF OF SAFETY RAIL PER DETAIL SHEET 2. CONNECT STEEL FABRIC TO LAST POINT OF EXISTING HAND RAIL ECEIVED MAY 0 9 1997 COMMUNITY DEVELOPMENT Q 1 "� ! Kp e,omt..tue 1 a.� i Lardiseve Architecture T �' file S. s� (JBLI C WORKS' DE -1/1"T. . - 0/96 90% REVIEW SUBMITTAL 3. .P *ENGINEERING*STREETS*WATER*SEWER*BUILDING* cy • 1906•`~ 3 P 0/ 6 to N� 10/96 SLOPE RESTORATION PLAN I 0 616PLN03.OWt "' scale AS SHOWN ` field bk )!D date revisions 10/96 io h T IN � h 4 N N � i `r / 6 1 %e 1 if.,. a l :�MOUND TOP ` � , TO DRAIN !tl r'' , W TO MINUS CRUSHED /i /i ROCK BACKFILL, COMPACT 1' TO 95% RESISTANCE SAFETY RAIL NTS 5Wf POST 3'1/ff RAIL (TYP) FABRIC SHALL BE 9 GAUGE 2 X 2 STEEL MESH BLACK VINYL COATED, KNUCKLED SELVAGES TOP & BOTTOM SECURE TO POSTS & RAILS WITH W GALVANIZED E. G. STAPLES AT 1' O.C. FABRIC TO BE ATTACHED ON SIDE FACING AWAY FROM PATH. 0 "i/2• MIN HYDROSEED ALL DISTURBED AREAS TYPICAL EXISTING GRADE NOTES: 1. SLOPE TRAIL AS SHOWN. PROVIDE POSITIVE DRAINAGE TO SOUTH ALONG BACK EDGE OF TRAIL. 2. PROVIDE FILTER FABRIC BETWEEN WOOD CHIPS AND SUBGRADE. 2 MIN CLEARANCE ,' TO ANY OBSTRUCTION (BOTH TRAIL SECTION, 4* DEPTH SIDES EXCEPT FOR SAFETY RAIL). 7' MIN BRANCH CLEARANCE ABOVE TRAIL SURFACE. >A` MEDIUM BARK CHIPS 6' WIDTH COMPACT TO 95% DENSITY, UNDISTURBED NATIVE SUBGRADE TYPICAL WOOD CHIP TRAIL NTS 2' MINIMUM FROM TOP OF SLOPE fOTNEW SArt I T KAI 3. SUBGRADE TO BE TREATED WITH HERBICIDE PRIOR TO PLACEMENT OF WOOD CHIPS. CONC. AC PAVED PARKING/ DRIVEWAY GRASS —CONCRETE BARRIER, TYPE 2 PER WSDOT STD PLAN C-8. CLEAR EXIST. VEGETATION BENEATH BARRIER & MATCH FLUSH WITH EXIST. EDGE OF PAVEMENT GRADE. TYPICAL SECTION NTS PENDETAIL THIS ONE EXISTING SHEET .............._[.__. VEGETATION TO .PROVttt 6' TRAIL NISHtD GRABS WIDTH PERI DETAIL, SMOOTH OUT EXISTING `�T .GROUND -IN-SLCUGHOUT AREA TO MATCH ADJACENT SLOP LS PER Ptarv. • RECEIVED MAY 0 9 1997 COMMUNITY DEVELOPMENT PW3LIC WORKS D_EP I'. * ENGINEERING * STREETS * WATER* SEWER *BUILDING * by date designed dram checked Prot en Prot dQ NJD LLW PJG NJD 10/96 10/96 10/96 10/96 field bk no 1E1PQ Architecture Landscape Architecture Ian >eerlae Urban Design 90% REVIEW SUBMITTAL TRAIL NO. 4 DETAILS & SECTION DO date revisions 1 2 3 file no 616PLN02DWG scale AS SHOWN date • 10/96