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HomeMy WebLinkAboutSEPA E99-0037 - CITY OF TUKWILA / PUBLIC WORKS - STREAM CHANNEL MAINTENANCECITY WIDE STREAM CHANNEL PROGRAM MAINTENANCE PROGRAM CITY-WIDE E99-0037 Dept. Of Community Development City of Tukwila AFFIDAVIT OF DISTRIBUTION 1, 4/.eh el// HEREBY DECLARE THAT: Notice of Public Hearing /Determination of Non -Significance Notice of Public Meeting Project Name Ti,/i.4_, fdf1 kreft Mitigated Determination.of Non - Significance , 7 Board of Adjustment Agenda Pkt 94.,6/9 Determination of Significance & Scoping Notice 0.4!;65:'4___ Board of Appeals Agenda Pkt Notice of Action Planning Commission Agenda Pkt Official Notice Short Subdivision Agenda , Notice of Application Shoreline Mgmt Permit Notice of Application for Shoreline Mgmt Permit Other Other Was mailed to each of'the addresses listed on this ern day ofjan in the year 20 OD P:GINAWYNETTA/FORMS/AFFIDAVIT-MAIL01/11/0012:53 PM • Project Name Ti,/i.4_, fdf1 kreft Project Number: E - q f- X 7 7. Mailer's Signature: v 0 94.,6/9 Person requesting mailing: 0.4!;65:'4___ P:GINAWYNETTA/FORMS/AFFIDAVIT-MAIL01/11/0012:53 PM CHECKLIST: ENVIRONMENTAL REVIEW/SHORELINE PERMIT MAILINGS U.S. ARMY CORPS OF ENGINEERS FEDERAL HIGHWAY ADMINISTRATION (A DEPT OF FISH & WILDLIFE OFFICE OF ARCHAEOLOGY TRANSPORTATION DEPARTMENT DEPT NATURAL RESOURCES OFFICE OF THE GOVERNOR DEPT OF COMM. TRADE & ECONOMIC DEV. DEPT OF FISHERIES & WILDLIFE FEDERAL AGENCIES ( ) U.S. ENVIRONMENTAL PROTECTION AGENCY ( ) U.S. DEPT OF H.U.D. WASHINGTON STATE AGENCIES K.C. PLANNING & COMMUNITY DEV. BOUNDARY REVIEW BOARD FIRE DISTRICT #11 FIRE DISTRICT #2 K.C. WATER POLLUTION CNTRL SEPA OFFCL TUKWILA SCHOOL DISTRICT TUKWILA LIBRARIES RENTON LIBRARY KENT LIBRARY CITY OF SEATTLE LIBRARY U S WEST SEATTLE CITY LIGHT PUGET SOUND ENERGY HIGHLINE WATER DISTRICT SEATTLE WATER DEPARTMENT TCI CABLEVISION OLYMPIC PIPELINE KENT PLANNING DEPT TUKWILA CITY DEPARTMENTS: (>4 PUBLIC WORKS ( ) POLICE (> PLANNING G ( ) PARKS & REC. ( ) CITY CLERK FIRE FINANCE BUILDING MAYOR ( ) PUGET SOUND REGIONAL COUNCIL ( ) P.S. AIR POLLUTION CONTROL AGENCY ( ) SW K C CHAMBER OF COMMERCE 4 MUCKLESHOOT INDIAN TRIBE ()41 DUWAMISH INDIAN TRIBE ( ) SEATTLE TIMES 07/09/98 C:WP51DATA\CHKLIST ( ) DEPT OF SOCIAL & HEALTH SERV. DEPT OF ECOLOGY, SHORELIND DIV ( DEPT OF ECOLOGY, SEPA DIVISION* ( ) OFFICE OF ATTORNEY GENERAL * SEND CHKLIST W/ DETERMINATIONS * SEND SITE MAPS WITH DECISION KING COUNTY AGENCIES ( ) K.C. DEPT OF PARKS ( ) HEALTH DEPT ( ) PORT OF SEATTLE (4) K.C.DEV & ENVIR SERVICES-SEPA INFO CNTR ( ) K.C. TRANSIT DIVISION - SEPA OFFICIAL ,SCHOOLS/LIBRARIES, HIGHLINE SCHOOL DISTRICT K C PUBLIC LIBRARY SEATTLE MUNI REF LIBRARY SEATTLE SCHOOL DISTRICT RENTON SCHOOL DISTRICT UTILITIES PUGET SOUND POWER & LIGHT VAL-VUE SEWER DISTRICT WATER DISTRICT #20 WATER DISTRICT #125 CITY OF RENTON PUBLIC WORKS RAINIER VISTA SKYWAY CITY AGENCIES RENTON PLANNING DEPT CITY OF SEA -TAC CITY OF BURIEN TUKWILA PLANNING COMMISSION MEMBERS TUKWILA CITY COUNCIL MEMBERS CITY OF SEATTLE - SEPA INFO CENTER - DCLU SEATTLE OFFICE OF MGMNT & PLANNING* * NOTICE OF ALL SEATTLE RELATED PLNG PROJ. OTHER LOCAL AGENCIES METRO ENVIRONMENTAL PLANNING DIV. OFFICE/INDUSTRIAL 5,000 GSF OR MORE RESIDENTIAL 50 UNITS OR MORE RETAIL 30,000 GSF OR MORE • o • CITY OF TUKWILA DETERMINATION OF NONSIGNIFICANCE (DNS) DESCRIPTION OF PROPOSAL: SEPA FOR PW CITY WIDE STREAM CHANNEL/DITCH MAINTENANCE PROGRAM PROPONENT: CITY OF TUKWILA PUBLIC WORKS LOCATION OF PROPOSAL, INCLUDING STREET ADDRESS, IF ANY: ADDRESS: 6300 SOUTHCENTER BL PARCEL NO: 000320-0005 SEC/TWN/RNG: LEAD AGENCY: CITY OF TUKWILA FILE NO: E99--0037 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. ***********•k****•k*********•k********** k•************* ***•k***•*•k******•k****•k*•k* This determination is final and signed this 1 a day of _07¢f1V_.__ 2000 . SL -eve Lancaster, R€po e Official City of Tukwila, (2O•/i 431-3670 6300 Southcenter Boulevard Tukwila, WA 98188 Copies of the procedures for SEPA appeals are available with the Department of Community Development. • ADDENDUM TO SEPA DETERMINATION OF NON -SIGNIFICANCE Dated January 18, 2000 File No. E99-0037 Project Description: On January 18`h, 2000, a Determination of Non -Significance ("DNS") was issued in connection with the City Wide Stream Channel/Ditch Maintenance Program. This DNS focused on the attributes associated with cleaning and maintaining stream channel and ditches within the City. During the preliminary review of our Hydraulic Permit Approval (HPA) application by the Washington Department of Fish and Wildlife (WDFW), a mitigation activity not previously described within the original SEPA Checklist was added to the project. This mitigation activity involves the removal of a 24 - foot piece of culvert to open up and restore a portion of the stream channel adjacent to S. 134th St. Since this activity was not included within our initial HPA, WDFW has asked us to apply for a second HPA to specifically cover the mitigation activity of the culvert removal and subsequent stream habitat restoration. A set of illustrations has been included for your review. Agencies with Jurisdiction: City of Tukwila Washington Department of Fish and Wildlife Summary of Primary Impacts: Stream flow in the area of the culvert removal will be diverted around the site to de -water the restoration location. Prior to this diversion, aquatic species will be moved to suitable areas within the same stream system per the provisions set forth within the WDFW issued Scientific Collection Permit. Impact to the localized stream environment will be consistent with the previously submitted SEPA Checklist for this project. Recommendation: Approval of Addendum to Determination of Non -Significance. This Addendum to the Determination of Non -Significance (E99-0037) is final and signed the %day of April, 2000. Steve Lancaster, Responsible Official City of Tukwila (206) 431-3670 6300 Southcenter Blvd. Tukwila, WA. 98188 City of Tukwila • • John W. Rants, Mayor Department of Community Development Steve Lancaster, Director To: Steve Lancaster From: Deborah Ritter Date: January 18, 2000 Re: MEMORANDUM E99-0037 (SEPA Determination) City -Wide Stream Channel and Ditch Maintenance Program Project Description: This SEPA review is in connection with a city-wide program established to maintain stream channel and ditch locations. This maintenance will prevent the localized flooding and damage of residential and commercial properties and roadways. The maintenance activities will occur per the provisions set forth in an approved HPA permit, on an as -needed basis. Typically, in -water work occurs between July 1st and September 30th of each year. Agencies with Jurisdiction: State of Washington Department of Fish and Wildlife. Summary of Primary Impacts: • Earth The soils are made up of silty sands with small gravels. A majority of the sites are at a 6% slope or less, which are the current incised ditch and stream banks. No erosion is expected to occur from within the proposed project locations. However, where maintenance activities occur in the water, a temporary condition of turbidity may result. HPA permit conditions, including erosion control, will be followed to minimize any adverse impacts to fish species and surrounding habitat. • Air Diesel exhaust from heavy equipment will be generated during maintenance 6300 Southcenter Boulevard Suite #100 • Tukwila, Washington 98188 • (206) 431-3670 • Fax (206) 431-3665 E99-0037 (SEPA) City -Wide Stream Channel and Ditch Maintenance Program January 18, 2000 Page 2 • • • Water Maintenance sites include, but are not limited to, the following: Pal Creek, along 27th Avenue South. Riverton Creek, east fork under crossing at S. 126th St. Riverton Creek, east fork near intersection of S. 128th Place & 37th Avenue S. Southgate Creek, South 134th St. Southgate Creek, South 133rd Street undercrossing. Southgate Creek east fork undercrossing of Macadam. Gilliam Creek tributary, near intersection of 42nd Ave. S. and S. 148th St. North Canyon Drainage off of Southcenter Parkway. Un -named tributary undercrossings of 49th Ave. S, 48th Ave. S and 47th Ave. S. Gilliam Creek, undercrossing of 42nd. Avenue South. The upstream erosion rate and time interval between maintenance activities will determine the amount of accumulated sediment that will need to be removed. Accumulated sediment amounts at each individual site could exceed 15 cubic yards over a two year period. Water may be diverted at particular sites during maintenance if there is no seasonal dry period. Diversions will implemented under HPA conditions via passive gravity flow or by fish -screened pump. • Plants During maintenance activities typical vegetation (such as Himalayan blackberry, reed canary grass and watercress) will be removed. Maintenance mitigation will include seeding and planting of native riparian vegetation, as needed, per HPA conditions. • Animals Sections of Riverton Creek, Southgate Creek and Pal Creek have a documented presence of salmonids. Coho Salmon migrate to both Riverton and Southgate Creek. Coho juveniles are found in Gilliam Creek. Cut Throat Trout have been identified in the Riverton, Southgate and Gilliam Creek drainages. It is possible that Steelhead may also use these drainages. Migratory passerine birds and waterfowl may have an incidental presence, as the region lies within the Pacific Flyway. E99-0037 (SEPA) City -Wide Stream Channel and Ditch Maintenance Program January 18, 2000 Page 3 • • Energy/Natural Resources N/A Environmental Health Noise generated by heavy equipment will occur on a short-term basis. The hours of equipment usage will comply with the City's noise ordinance. • Land/Shoreline Use Sites are stream channels that lay adjacent to roadways. Some of the intended maintenance sites are adjacent to instream culverts. Some of the proposed sites lay within sensitive areas, however these sites are watercourses that are outside the Shoreline Zone of the Green/Duwamish River. The stream channels and ditches are located in various residential and commercial zones. Housing N/A Aesthetics N/A Light and Glare N/A Recreation N/A Historic and Cultural Preservation N/A Transportation E99-0037 (SEPA) City -Wide Stream Channel and Ditch Maintenance Program January 18, 2000 Page 4 • • N/A • Public Services N/A • Utilities Project will not increase demand on the utility systems. Recommendation: Determination of Non -Significance. January 14, 2000 City of Tukwila • 1 John W. Rants, Mayor Department of Community Development Steve Lancaster, Director NOTICE OF COMPLETE APPLICATION Jim Morrow Director Public Works Department City of Tukwila 6300 Southcenter Boulevard, Suite 101 Tukwila, Washington 98188 RE: City -Wide Stream Channel and Ditch Maintenance Program E99-0037 Dear Jim: Your application for a SEPA determination on the above -referenced program has been found to be complete as of January 14, 2000 for the purposes of meeting state mandated time requirements. Essentially, this means that you have supplied the required items listed on the application checklist for this type of permit. We are about to commence our technical review process, which is the next phase in the processing of your SEPA application. Although your SEPA application has been found to be "complete", the items you supplied may have to be revised or amended. The City may also require that you submit additional plans and information to ensure the project meets the substantive requirements of the City and to finalize the review process. If you have any questions, please feel free to call me at 206-431-3663. Sincerely, Deborah Ritter Assistant Planner cc: Jack Pace Ryan Partee 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431-3670 • Fax (206) 431-3665 • 1 Control No. Epic File No. Fee: Receipt No. ENVIRONMENTAL CHECKLIST A. BACKGROUND 1. Name of proposed project, if applicable: City Wide Stream Channel/Ditch Maintenance Program 2. Name of applicant: City of Tukwila 3. Address and phone number of applicant and contact person: 6300 Southcenter Blvd. Tukwila, WA 98188 206-433-0179 ext. 1646 Ryan Partee Fisheries Biologist 4. Date checklist prepared: 12/22/99 5. Agency requesting checklist: City of Tukwila RECEIVED WY OF TUKWILA JAN 2000 PERMIT CENTER 6. Proposed timing or schedule (including phasing, if applicable): Activities will occur per provisions set forth in an approved HPA on an as needed basis. Typically, in -water work occurs between July 151 and September 30`h. 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. This application is for stream channel/ditch maintenance and associated activities. Additional maintenance sites may be included if needed and will be coordinated with WDFW. Mitigation stemming from the maintenance activities will also occur as a result of this program. These mitigation actions will also be coordinated with WDFW. The mitigation activities are described in question 11. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. This checklist and a Hydraulic Project Approval (HPA) permit. Page 1 ENVIRONMENTAL CHECT 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. 10. List any government approvals or permits that will be needed for your proposal. Washington Department of Fish and Wildlife HPA. 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. The City Wide Stream Channel/Ditch Maintenance Program is intended to provide for a City Wide program by where the City of Tukwila may maintain identified stream channel/ditch locations to prevent the localized flooding and damage of residential properties, commercial properties, and roadways. The proposed maintenance consists of using a backhoe to remove accumulated sands and silts from the stream/ditch channel that is responsible for creating a condition that results in localized flooding (this maintenance also includes the clean out of culverts). Where determined by WDFW, running water within these stream/ditch channels will be diverted around the project sites by the most appropriate method (screened pump of gravity flow). In addition, The City's Fisheries Biologist will inspect each of the proposed sites prior to any maintenance activities for the presence of salmonids. Fish (and other aquatic species) discovered on the project site/s will be handled according to the approved HPA. This handling usually involves the relocation of these fish to an area within the same drainage that is upstream of the project site. In certain situations, fish may be temporarily held in an on-site holding tank. After the site maintenance activity has been completed, fish will be returned to the areas from which they were collected. Additional permits concerning the collection and/or temporary holding of these fish will be sought from the WDFW as required. The City's Fisheries Biologist will be onsite during the maintenance activity and will be available for consultation for the duration of the maintenance and mitigation activities. Attached is a City map showing the primary programmatic project locations, a photo typical for the intended work, and a step by step set of illustrations. This map is only intended to illustrate the known maintenance locations. Additional locations may be added (if necessary) and coordinated through the WDFW. Any new locations will follow the same treatments as the sites listed within this application. 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. Page 2 • ENVIRONMENTAL CHECKLIST • Enclosed is a map with the specific locations marked in yellow. These sites include but are not limited to: 1. Pal Creek, along 27th Ave. S. 2. Riverton Creek, East fork under crossing at S. 126th St. 3. Riverton Creek, East fork near intersection of S. 128`h Pl. and 37th Ave. S. 4. Southgate Creek, S. 134`h St. 5. Southgate Creek, S. 133`d St. undercrossing. 6. Southgate Creek East fork undercrossing of Macadam. 7. Gilliam Creek tributary, near intersection of 42"d Ave. S. and S. 148th St. 8. North Canyon Drainage off of Southcenter Parkway 9. Un -named tributary undercrossings of 49`h Ave S., 48th Ave. S., and 47th Ave. S. 10. Gilliam Creek, undercrossing of 42"d Ave. S. All of the proposed maintenance activities are located within City of Tukwila Rights -of Way for public streets. 13. Does the proposal lie within an area designated on the City's Comprehensive Land Use Policy Plan Map as environmentally sensitive? Yes. Most of the intended maintenance locations are within City inventoried watercourses. These watercourses include but may not be limited to: • Pal Creek • Riverton Creek • Southgate Creek • Gilliam Creek 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)? Slopes are the current incised ditch/stream banks. A majority of the sites are at a 6% slope or less. 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 Primarily the soils here are made up of silty sands with small gravels. Page 3 ENVIRONMENTAL CHECIST d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. Areas upstream from each of the designated maintenance sites have a history of erosion. This project seeks to remove the accumulation of transported material that "deposits" at these sites to minimize localized flooding and maintain channel capacity. Otherwise the adjacent roadway surface conditions are stable. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed Indicate source of fill. No fill material will be placed with the exception of spawning gravel as may be required for salmon enhancement in the approved HPA. Spawning gravel will be obtained through a gravel retailer. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. No erosion is expected to occur from within the proposed project locations. However, where maintenance activities occur in the water a temporary condition of turbidity may result. Conditions set forth in the approved HPA will be adhered to, to minimize adverse impacts to fish species and the surrounding available habitat. For the most part, the maintenance activity will be carried out when these sections of ditch experience seasonal dryness. In areas that do not experience a seasonal dry period, water will be diverted around the maintenance area and measures will be taken to reduce turbidity as set forth in the approved HPA. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? None. No new impervious will be constructed as part of this maintenance program. g. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Erosion control will be employed during maintenance as set forth in the approved HPA. This may include but not be limited to erosion control standards outlined in the most recent copy of the King County Surface Water Design Manual. Mitigation activities following the completion of the maintenance activities will address any subsequent erosion. Adaptive Bioengineering Practices will be applied to stabilize erosion as necessary. This will include the planting of native streamside vegetation and the possible placement of instream structures. Again, mitigation activities will be coordinated with the WDFW. Page 4 ENVIRONMENTAL CHECKL T 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. During maintenance activity, diesel exhaust from heavy equipment will be discharged to the atmosphere. 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. Yes. Please see question #A 12 for locations. Bodies of water include tributaries and main stems of Gilliam Creek, Southgate Creek, Riverton Creek, Pal Creek and several other un- named drainages. 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. The maintenance program and mitigation activities will be working within each of the water bodies mentioned in question 3.a.1., below the ordinary high water mark. These sites may be generally described as small streams that have been manipulated and re-routed over time into roadside pathways, which in many instances resemble and perform as roadside ditches. Work activities involve the removal of accumulated sands and sediments to accommodate seasonal high flows and to protect public and private property from flood damage. Site plans are attached, as are detail illustrations. 3) Estimate the amount of fill and dredge materia! 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 offill material. This is difficult to estimate as the upstream erosion rate and the time interval between maintenance activities will determine the amount of accumulated sediment needing to be removed. Each individual site (shown on included map) may involve as much as 10 to 15 cubic yards of sand and sediment to be removed once every 2 years. In instances of Page 5 ENVIRONMENTAL CHECKOT significant upstream erosion or on site deposition exceeding past experience, volumes exceeding the 10 to 15 cubic yard estimate may not be unlikely. Removed sediment will be transported to the City Facility on S. 158t St., for de -watering. Once that is accomplished, the sediment is transported to processing facility. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities, if known. Water may be diverted during maintenance where the stream/ditch does not have a seasonal dry period. Diversions may be achieved by one of two methods; a passive (gravity flow) large flexible plastic pipe and a sandbag diversion dam, or by an adequate sized (fish screened) pump. Precautions will be taken to minimized fish and water quality impacts as set forth in the approved HPA. 5) Does the proposal lie within a 100 year floodplain? If so, note location on the site plan. None of the sites are within the 100 -year flood plain of the Green/Duwamish River. 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. Yes. During construction, some turbidity and transportation of sand and small gravel is expected to occur. 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. Ground water will not be affected. 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. None. 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 will not increase existing runoff potential but serve to more adequately accommodate seasonal high volume flows. Page 6 ENVIRONMENTAL CHEAT • 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: Planting of streamside vegetation will slow the contribution of surface runoff during rain events and increase streambank stability. Planting of new vegetation will occur after maintenance activities. This will include a combination of Hydro -seeding, willow staking, and trees and shrubs where appropriate. Additional mitigation activities may occur as outlined in the approved HPA. 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? Most likely the vegetation that will be removed during the maintenance activities will include: himalayan blackberry, reed canary grass, and watercress. c. List threatened or endangered species known to be on or near the site. No threatened or endangered plant species are known to be on or nearby the project site/s. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: Maintenance mitigation will include seeding and planting of native riparian vegetation as needed. Vegetation will be placed in such a manner as to accommodate future maintenance activities as well as provide an increase in habitat value and function for the watercourse. WDFW mitigation activities will be outlined within the approved HPA. Page 7 deciduous tree: alder, maple, other 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, eel grass, milfoil, other other types of vegetation b. What kind and amount of vegetation will be removed or altered? Most likely the vegetation that will be removed during the maintenance activities will include: himalayan blackberry, reed canary grass, and watercress. c. List threatened or endangered species known to be on or near the site. No threatened or endangered plant species are known to be on or nearby the project site/s. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: Maintenance mitigation will include seeding and planting of native riparian vegetation as needed. Vegetation will be placed in such a manner as to accommodate future maintenance activities as well as provide an increase in habitat value and function for the watercourse. WDFW mitigation activities will be outlined within the approved HPA. Page 7 ENVIRONMENTAL CHECI.T 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: songbirds, crows. Mammals: raccoons, squirrels, small rodents. Fish: coho salmon, cutthroat trout, threespine stickleback, sculpin. Other: insects. b. List any threatened or endangered species known to be on or near the site. Chinook salmon (Oncorhynchus tshawytscha) juveniles may have an incidental presence on sites where anadromous salmonids have access between March and June of each year. No other threatened or endangered animal species are known to be on or nearby the project sites. Prior to maintenance activities, sites will be thoroughly inspected by the City of Tukwila's Fisheries Biologist. All fish and aquatic species discovered on site will be relocated within the same watercourse outside of the designated maintenance area. This relocation may be assisted by the WDFW as necessary. c. Is the site part of a migration route? If so, explain. Yes. Sections of Riverton Creek, Southgate Creek, and Pal Creek where maintenance activities will occur, have a documented presence of salmonids. Coho salmon (Oncohynchus kisutch) are known to currently migrate back to both Riverton and Southgate Creeks to spawn. Although no coho adults have been seen within Gilliam Creek, coho juveniles do recruit to the stream each year. Pal Creek has also had some historic sightings of adult salmonids with in the drainage. However, the last such sighting was prior to 1996. In addition, resident populations of cutthroat trout (Oncohynchus clarki) have been identified in Riverton, Southgate, and the Gilliam Creek Drainages. It has not yet been determined if there is any anadromous trout (steelhead, Oncohynchus mykiss) usage of these drainages however, it may be possible. This region also lies within the Pacific Flyway. Migratory passerine birds as well as waterfowl may have an incidental presence at times. d. Proposed measures to preserve or enhance wildlife, if any: Planned re -vegetation and possible placement of enhancement structures will be conducted in accordance with the approved HPA. This may include but may not be limited to: • Bank stabilization. • Planting of native streamside vegetation. • Placement of spawning gravel. • Placement of in -water habitat structures or woody debris. • Continuation of the City's Salmonid Supplementation Program. Page 8 ENVIRONMENTAL CHECI ST 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. Gravity. Water transportation. 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: None. 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: noise generated by the use of heavy equipment during business hours. • Long term: N/A Page 9 ENVIRONMENTAL CHECIOST • 3) Proposed measures to reduce or control noise impacts, if any: Restrict hours of operation to comply with the City's noise ordinance. 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? Currently all sites are seasonal or perennial streams that lay adjacent to roadways in constructed channels. b. Has the site been used for agriculture? If so, describe. Unknown. Currently, none of the proposed maintenance sites have any agricultural activities. c. Describe any structures on the site. Sites are stream channels that lay adjacent to roadways. Some of the intended maintenance sites are adjacent to instream culverts. d. Will any structures be demolished? If so, what? None. e. What is the current zoning classification of the site? Residential and commercial f. What is the current comprehensive plan designation of the site? Unknown. g. If applicable, what is the current shoreline master program designation of the site? Not Applicable h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. Some of these proposed sites lay within sensitive areas however, these sites are watercourses that are outside of the shoreline zone of the Green/Duwamish River. 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. Page 10 ENVIRONMENTAL CHECKL. • k. Proposed measures to avoid or reduce displacement impacts, if any: None. L Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: The proposed improvements do not change the existing use or capacity. 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing? Not applicable. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. Not applicable. c. Proposed measures to reduce or control housing impacts, if any: Not applicable. 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? Not applicable. b. What views in the immediate vicinity would be altered or obstructed? None. c. Proposed measures to reduce or control aesthetic impacts, if any: None. 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. Page 11 ENVIRONMENTAL CHECK•T • c. What existing off-site sources of light or glare may affect your proposal? None. 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? None. 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: None. 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. None known. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. None known. c. Proposed measures to reduce or control impacts, if any: None. 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. N/A b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? N/A Page 12 ENVIRONMENTAL CHECKLLT • c. How many parking spaces would the completed project have? How many would the project eliminate? N/A 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: None. 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. None. 16. Utilities a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other. None. 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. Page 13 ENVIRONMENTAL CHEC4T • 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 decision. Signature: 6,41 Date Submitted: Page 14 0//3/ ENVIRONMENTAL CHECK • D. SUPPLEMENTAL SHEET FOR ALL PROJECT AND NON PROJECT PROPOSALS The objectives and the alternative means of reaching the objectives for a proposal will be helpful in reviewing the foregoing items of the Environmental Checklist. This information provides a general overall perspective of the proposed action in the context of the environmental information provided and the submitted plans, documents, supportive information, studies, etc. 1. What are the objectives of the proposal? Flood prevention and stream channel/ditch maintenance. 2. What are the alternative means of accomplishing these objectives? None. 3. Please compare the alternative means and indicate the preferred course of action: None alternative available. 4. Does the proposal conflict with policies of the Tukwila Comprehensive Land Use Policy Plan? No. 5. Proposed measures to avoid or reduce the conflict(s) are: None. Page 15 Control No. Epic File No. 41 • n 033 Fee: Receipt No. ENVIRONMENTAL CHECKLIST A. BACKGROUND 1. Name of proposed project, if applicable: City Wide Stream Channel/Ditch Maintenance Program 2. Name of applicant: City of Tukwila. 3. Address and phone number of applicant and contact person: 6300 Southcenter Blvd. Tukwila, WA 98188 206-433-0179 Ryan Partee 4. Date checklist prepared: 12/22/99 5. Agency requesting checklist: City of Tukwila. CITY OF TUKWILA ®EC 2 0 1999 PERMIT CENTER 6. Proposed timing or schedule (including phasing, if applicable): Activities will occur per provisions set forth in an approved HPA on an as needed basis. 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. No, this application is for stream channel/ditch maintenance and associated activities. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. This checklist and a Hydraulic Project Approval (HPA) permit. Page 1 • ENVIRONMENTAL CHECK!, • 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. 10. List any government approvals or permits that will be needed for your proposal. Washington Department of Fish and Wildlife HPA. 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. The City Wide Stream Channel/Ditch Maintenance Program is intended to provide for a City Wide program by where we may maintain specific stream channel/ditch locations to prevent the localized flooding of residential properties, commercial properties, and roadways. Attached is a City map showing the programatic project locations, a photo typical for the intended work, and a step by step set of illustrations. 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. Enclosed is a map with the specific locations marked in red. The locations are as follows: 1. Pal Creek, along 27th Ave. S. 2. Riverton Creek, East fork under crossing at S. 126`h St. 3. Riverton Creek, East fork near intersection of S. 128`h Pl. and 37th Ave. S. 4. Southgate Creek, S. 134th St. 5. Southgate Creek, S. 133`d St. undercrossing. 6. Southgate Creek East fork undercrossing of Macadam. 7. Gilliam Creek tributary, near intersection of 42"d Ave. S. and S. 148`h St. 8. North Canyon Drainage off of Southcenter Parkway 9. Un -named tributary undercrossings of 49`h Ave S., 48`h Ave. S., and 47th Ave. S. 10. Gilliam Creek, undercrossing of 42"d Ave. S. The project is located within the City of Tukwila. 13. Does the proposal lie within an area designated on the City's Comprehensive Land Use Policy Plan Map as environmentally sensitive? Yes. Most of the listed locations are within City inventoried watercourses. Page 2 ENVIRONMENTAL CHECKLIST 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)? Slopes are the current incised ditch/stream banks. A majority of the sites are at a 6% slope or less. 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. Primarily the soils here are made up of silty sands with small gravels. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. Areas upstream from each of the designated maintenance sites have a history of erosion. This project seeks to remove the accumulation of transported material that "deposits" at these sites to minimize localized flooding and maintain channel capacity. Otherwise the adjacent roadway surface conditions are stable. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. No fill material will be placed with the exception of gravel as may be required for fish enhancement in the approved HPA. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. No. However, where maintenance activities "in water" a temporary condition of turbidity may result. Conditions set forth in the approved HPA will be adhered to, to minimize this. For the most part, the maintenance activity will be carried out when these sections of ditch experience seasonal dryness. In areas that do not have a seasonal dry period, measures will be taken to reduce turbidity as set forth in the approved HPA. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? None. No new impervious will be constructed as part of this maintenance program. Page 3 ENVIRONMENTAL CHECKLIST •' h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Erosion control will be employed during maintenance as set forth in the approved HPA. 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. During maintenance diesel exhaust from heavy equipment will be discharged to the atmosphere. 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. Yes. Please see question #A 12 for locations. Bodies of water include Tributaries and main stems of Gilliam Creek, Southgate Creek, Riverton Creek, Pal Creek and several other un -named drainages. 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. The maintenance program will be working within each of the water bodies mentioned in question 3.a.1., below the ordinary high water mark. These sites may be generally described as small streams that have been manipulated and re-routed over time into roadside pathways, which in many instances resemble and perform as roadside ditches. Work activities involve the removal of accumulated sands and sediments to accommodate seasonal high flows and to protect public and private property from flood damage. Site plans are attached, as are detail illustrations. Page 4 ENVIRONMENTAL CHECKLT 411_ 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. This is difficult to estimate as the upstream erosion rate and the time interval between maintenance activities will determine the amount of accumulated sediment needing to be removed. Each individual site (shown on included map) will involve approximately 10 to 15 cubic yards of sand and sediment to be removed once every 2 years. In instances of significant upstream erosion or on site deposition exceeding past experience, volumes exceeding the 10 to 15 cubic yard estimate may not be unlikely. Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities, if known. Water may be diverted during maintenance where the stream does not have a seasonal dry period. Any diversion of a water body will be regulated by the approved HPA. 5) Does the proposal lie within a 100 year floodplain? If so, note location on the site plan. None of the sites are within the 100 -year flood plain of the Green/Duwamish River. 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. Yes. During construction, some turbidity and transportation of sand and small gravel is expected to occur. 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. None. Page 5 • ENVIRONMENTAL CHECKLIST 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 will not increase existing runoff potential. 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: Planting of streamside vegetation will slow the contribution of surface runoff during rain events and increase streambank stability. Planting of new vegetation will occur after maintenance activities. This will include a combination of Hydro -seeding, willow staking, and trees and shrubs where appropriate. 4. Plants a. Check or circle types of vegetation found on the site: ✓ deciduous tree: maple, other evergreen tree: fir, cedar, pine, other shrubs r grass pasture crop or grain wet soil plants: cattail, buttercup, bulrush, skunk cabbage, other ‘✓ water plants: water lily, eel grass, milfoil, .44-rbwa4oss s ✓ other types of vegetation /fr„iekc4la►riky b. What kind and amount of vegetation will be removed or altered? Most likely the vegetation that will be removed during the maintenance activities will include: himalayan blackberry, reed canary grass, and watercress. c. List threatened or endangered species known to be on or near the site. No threatened or endangered plant species are known on or to be nearby the project site. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: Restoration will include seeding and planting of native riparian vegetation as needed. Page 6 ENVIRONMENTAL CHECK T 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: . son bird,. crows le_ se Mammals: Fish: Other: raccoo small rodent coho salmo utthroat tro insects. eespine sticklebaMMIO b. List any threatened or endangered species known to be on or near the site. Chinook salmon (Oncorhynchus tshawytscha) may have an incidental presence in Pal and Southgate Creeks between March and June of each year. No other threatened or endangered animal species are known to be on or nearby the project sites. c. Is the site part of a migration route? If so, explain. Yes. Sections of Riverton Creek, Southgate Creek, and Pal Creek where maintenance activities will occur, have a documented presence of salmonids. d. Proposed measures to preserve or enhance wildlife, if any: Planned re -vegetation and possible placement of enhancement structures will be conducted in accordance with the approved HPA. 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. Gravity. Water transportation. 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. Page 7 fib • ENVIRONMENTAL CHECKLIST • 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: None. 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: noise generated by the use of heavy equipment during business hours. • Long term: N/A 3) Proposed measures to reduce or control noise impacts, if any: Restrict hours of operation to comply with the City's noise ordinance. 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? Currently all sites are seasonal or annual streams that lay adjacent to roadways in constructed channels. b. Has the site been used for agriculture? If so, describe. No. c. Describe any structures on the site. Sites are stream channels that lay adjacent to roadways. Page 8 ENVIRONMENTAL CHECK T d. Will any structures be demolished? If so, what? None. e. What is the current zoning classification of the site? Residential and commercial • f What is the current comprehensive plan designation of the site? Unknown. g. If applicable, what is the current shoreline master program designation of the site? Not Applicable 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? None. j. Approximately how many people would the completed project displace? None. k. Proposed measures to avoid or reduce displacement impacts, if any: None. 1. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: The proposed improvements do not change the existing use or capacity. 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing? Not applicable. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. Not applicable. Page 9 ENVIRONMENTAL CHECKLIST c. Proposed measures to reduce or control housing impacts, if any: Not applicable. 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? Not applicable. b. What views in the immediate vicinity would be altered or obstructed? None. c. Proposed measures to reduce or control aesthetic impacts, if any: None. Page 10 ENVIRONMENTAL CHECKKT • 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. 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? None. 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: None. 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. None known. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. None known. c. Proposed measures to reduce or control impacts, if any: None. Page 11 ENVIRONMENTAL CHECKLIST 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. N/A b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? N/A c. How many parking spaces would the completed project have? How many would the project eliminate? N/A 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 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 known, indicate when peak volumes would occur. N/A g. Proposed measures to reduce or control transportation impacts, if any: None. 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. None. Page 12 ENVIRONMENTAL CHECIPST 16. Utilities • a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other. None. 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 knowledge. I understand that the lead agency is relying on them to make its decision. Signature: Ailcities bi oc oc.rr Date Submitted: /Z/ //y Page 13 • • ENVIRONMENTAL CHECKLIST D. SUPPLEMENTAL SHEET FOR ALL PROJECT AND NON PROJECT PROPOSALS The objectives and the alternative means of reaching the objectives for a proposal will be helpful in reviewing the foregoing items of the Environmental Checklist. This information provides a general overall perspective of the proposed action in the context of the environmental information provided and the submitted plans, documents, supportive information, studies, etc. 1. What are the objectives of the proposal? Flood prevention and stream channel/ditch maintenance. 2. What are the alternative means of accomplishing these objectives? None. 3. Please compare the alternative means and indicate the preferred course of action: None alternative available. 4. Does the proposal conflict with policies of the Tukwila Comprehensive Land Use Policy Plan? No. 5. Proposed measures to avoid or reduce the conflict(s) are: None. Page 14 i City of Tukwila 1 John W Rants, Mayor Department of Public Works James E Morrow, P.E., Director INFORMATION MEMO To: City of Tukwila, Department of Community Development From: Ryan Partee, Fisheries Biologist, Public Works Date: December 28th, 1999 Subject: SEPA Application for City Wide Stream Channel/Ditch Maintenance Program The City of Tukwila is now required to have a Hydraulic Project Approval Permit from the Washington Department of Fish and Wildlife to conduct stream channel/ditch maintenance activities within the City limits. On behalf of the Public Works Department I am submitting six (6) copies of the Environmental Checklist for review. Please contact me at extension 1646 for questions or comments. Thank You. CITYMEWED OF TUKWItA DEC 2 6 1999 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone: (206) 433-0179 • Fax: (206) 431-3665 • CITY OF TUKWILA Department of Community Development 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 FAX (206) 431-3665 E-mail: tukplaneci.tukwila.wa.us SEPA ENVIRON. REVIEW (P-SEPA) APPLICATION NAME OF PROJECT/DEVELOPMENT: CAklik—u044 arecun t an neSZ / becg-t nlatntenu,rvez. Pcoec cov LOCATION OF PROJECT/DEVELOPMENT: (Give street address or, if vacant, indicate lot(s), block and subdivision, access street, and nearest intersection. LIST ALL 10 DIGIT PARCEL NUMBERS. VOtiQ\OUS akaiof) � J Quarter: Section: Township: Range: (This information may be found on your tax statement.) DEVELOPMENT COORDINATOR : The individual who: • has decision making authority on behalf of the 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: RLAay Pact e_ Address: Phone: FAX: Signature: Date: G: APPHAMLANDUSE.APP\SEPAAPP.DOC. 12/08/99 FOR STAFF USE ONLY � .� �� Planner: " p,�-1 Rt- 1Uv j File Number: g of ci - 00 3,--+ Application Complete (Date: ) Project File Number: Application Incomplete (Date: ) Other File Numbers: NAME OF PROJECT/DEVELOPMENT: CAklik—u044 arecun t an neSZ / becg-t nlatntenu,rvez. Pcoec cov LOCATION OF PROJECT/DEVELOPMENT: (Give street address or, if vacant, indicate lot(s), block and subdivision, access street, and nearest intersection. LIST ALL 10 DIGIT PARCEL NUMBERS. VOtiQ\OUS akaiof) � J Quarter: Section: Township: Range: (This information may be found on your tax statement.) DEVELOPMENT COORDINATOR : The individual who: • has decision making authority on behalf of the 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: RLAay Pact e_ Address: Phone: FAX: Signature: Date: G: APPHAMLANDUSE.APP\SEPAAPP.DOC. 12/08/99 COMPLETE 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 the Department if you feel that certain items are not applicable to your project and should be waived, or should be submitted in a later timely manner for use at the Public Hearing (e.g., revised colored renderings). Application review will not begin until it is determined to be complete. ADDITIONAL MATERIALS MAY BE REQUIRED, TO ENSURE CONSISTENCY WITH CITY DEVELOPMENT STANDARDS. Department staff are available to answer questions about application materials at 206-431-3670 Department of Community Development and 206-433-0179 Department of Public Works. COMPLETE APPLICATION CHECKLIST TABLE Information Required. May be waived in unusual cases, upon approval of both Public Works and Planning Information Waived PbWk/Ping Office Use Only Comments .& Conditions. APPLICATION FORMS: 1. Application Checklist one (1) copy, indicating items submitted with application. 2. Four (4) copies of supporting studies with original signatures and license stamp as needed. 3. Complete Application Packet: Eight (8) copies of application form and full sized plans, one set of PMT's of all plans reduced to 8.5" by 11", and other materials and information as specifically listed in Project Description and Analysis, Site Plans and Elevations. 4. SEPA Environmental Checklist (12 copies) and fee ($325). PUBLIC NOTICE MATERIALS: • SUBMIT ONLY IF UNDERLYING PERMIT REQUIRES PUBLIC NOTICE. 5. King County Assessor's map(s) which shows the location of each property within 500 feet of the subject lot. 6. Two (2) sets of mailing labels for all property owners and tenants (residents and businesses) within 500 feet of the subject property, See Public Notice Materials. Note: Each unit in multiple -family buildings-e.g. apartments, condos, trailer parks must be included). A 4' x 4' Public Notice Board will be required on site within 14 days of the Department determining that a complete application has been received. PROPERTY INFORMATION 7. Vicinity Map with site location. 8. Surrounding Land Use Map for all existing land uses within a 1,000 foot radius from the lot's property lines. 9. Title Report -- Clearly establish status as legal lot(s) of record, ownership, all known easements and encumbrances. 10. Lot lines for 300 ft. from the site's property lines including right-of-ways. G: APPHAN LANDUSE.APPISEPAAPP.DOC10/23/99 • . 1. Existing conditions. Currently, many of the channels listed in this application look like picture 1. They are primarily bordered by reed canary grass and himalayan blackberry with some occurrence of watercress in channel. Sand and silt is deposited at these locations reducing the flow capacity of the channel which can result in instances of localized flooding during heavy or sustained rain events. 2. Step 1 involves the relocation of aquatic species such as coho salmon and cutthroat trout where necessary and the removal of invasive vegetation. This allows for easy maintenance and provides the opportunity to re -vegetate with native streamside species. 3. Water flow to the work site/s may be temporarily diverted where necessary per the provisions set forth in the WDFW HPA to minimize off site transport of suspended sediments and degradation of water quality. 4. The accumulated sands and sediments will be removed to expose the original stream channel depth. This will restore the original water flow capacity of the channel. 5. Gravel will be placed on the channel bed as required in the WDFW HPA. 6. Jute matting or its equivalent will be placed on channel banks where soil becomes exposed. This will help to stabilize these soils until hydroseed and other plantings take hold. 7. Willow stakes will be placed as needed to assist in channel bank stability. 8. The completed maintenance will have restore channel capacity and significantly reduce localized flooding potential while also providing improved habitat for salmonids. COmomonl dlactct GRAVE -L. PLAfer, PEI2 4PA. VJA,TEZ. LEVEL frAo EP-MaSS ,Skat) et StLT -066i;:lki. ell 414 EL DEMI CLE USD v As i v EGE TAT% o ni. iuT 6- MA-rn..16 th1S7ALLE-b SLOPES AL ski CEDED . .;" "tto STA4 I LiZe" .".4.:1V7..." • • : r " -?•e RE hi 0 %/AL OF WATECLUESS ACCUMOLMED SAAD k 5ti 1A1A-TER_ T HYD PAt42-tLY DtJEZ-rEt>, ;.•,rr•— • "--: „ ‘‘. WILL° v4 STAKeS YOWLS a 6-t;•.,11::, ii\41/4 WAIM 'FLOW aeSTo Mt, '4•Xko,,,;`,:,4'"?. -.1: • •••••••,:.; • 5, 4 Xr • •• MARIA CA1041gEl. 04 Mutt Etc. -met) IWO 1411,41 WON - AZesroszkm 111.4 ‘.44-verz.. ovAPUTEmt MA ip.ITE-"14...lCS" %,k) to -1 getWitt.6) M 1-1 I•A--n c 4 E AI 14 44 En TS . NEW E bET AT 10 14 • TY? It Ak. NIMP4Tewitte4CC M11.1%1-4 SECk4er*ItE F ott. ikefattomArt. . e:rtm WIDE 51tee.+44 ct&A4Asti ChreA MeApmrlarilts VEIZAtT. • .4 •••-.•'• Picture typical for the City-wide stream channel/ditch maintenance program. • • •cI • • Y 01' S 93 S 99 St S100Si Rainier GotP f. 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