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Home My WebLink AboutReg 2025-10-06 Item 5C - Grant Acceptance - WA State Department of Ecology Grant for S 130th Bioretention Planters Design for $294,950COUNCIL AGENDA SYNOPSIS Initials Meeting Date Prepared by Mayor's review Council review 10/06/25 JR ITEM INFORMATION ID MNo. 5.C. STAFF SPONSOR: CATRIEN DE BOER ORIGINAL AGENDA DAIL: 10/06/25 AGENDA ITEM TITLE Riverton Stormwater Management Action Plan CIP— S 130th Bioretention Planters Department of Ecology Water Quality Combined Funding Grant Award CAILGORY ❑ Discussion Mtg Date 0 Motion Date 10/6/25 ❑ Resolution Mtg Date ❑ Ordinance Mtg Date ❑ Bid Award Mtg Date ❑ Public Hearing Mtg Date ❑ Other Mtg Date Mtg SPONSOR ❑Council ❑Mayor HR DCD ❑Finance ❑Fire TS ❑P&R ❑Police aPit ❑Court SPONSOR'S In October 2024, staff submitted an application to the DOE Water Quality Combined SUlLVARY Funding Program to fund the design through 90% of bioretention planers in the vicinity of S 130th St to improve water quality in Riverton Creek. In July 2025, the City was notified that we received the full grant award. Council is being asked to accept a DOE Water Quality Grant Award in the amount of $294,950.00. REVIEWED BY 0 Trans&Infrastructure ❑ CommunitySvs/Safety ❑ Arts Comm. 09/22/25 ❑ Finance ❑ Parks Comm. ❑ Planning/Economic Dev. Comm. ❑ Planning Comm. CHAIR: MOHAMED ABDI ❑ LTAC DATE: COMMIIIEE RECOMMENDATIONS: SPONSOR/ADMIN. CONDE_LIEE Public Works Department Unanimous Approval; Forward to Regular Consent Agenda COST IMPACT / FUND SOURCE EXPENDITURE REQUIRED AMOUNT BUDGETED APPROPRIATION REQUIRED $294,950.00 $0.00 $0.00 Fund Source: DEPARTMENT OF ECOLOGY GRANT AND CITY MATCH (SURFACE WATER FUND) Comments: CIP - Riverton Stormwater Management Action Plan - Program MTG. DATE RECORD OF COUNCIL ACTION 10/06/25 MTG. DATE ATTACHMENTS 10/06/25 Informational Memorandum dated 09/19/25 CIP Sheet - Riverton Stormwater Management Action Plan Vicinity map Minutes from Transportation and Infrastructure Committee meeting of 09/22/25 9 Thomas McLeod, Mayor Public Works Department - Jen Tetatzin, PE, PMP - Director INFORMATIONAL MEMORANDUM TO: Transportation and Infrastructure Services Committee FROM: Jen Tetatzin, Public Works Director BY: Catrien de Boer, Public Works Analyst CC: Mayor McLeod DATE: September 19, 2025 SUBJECT: Riverton Stormwater Management Action Plan CIP— S 130th Bioretention Planters Project No. 82541203 Department of Ecology Water Quality Combined Funding Grant Award ISSUE Accept a Washington State Department of Ecology (DOE) Water Quality Combined Grant to fund water quality improvements in the amount of $294,950. BACKGROUND In 2022, Council authorized staff to accept a DOE grant to develop a Stormwater Management Action Plan (SMAP) for the Riverton basin in Tukwila. Through this planning effort, several priority projects were developed along with conceptual -level cost estimates. DISCUSSION In October 2024, staff submitted an application to the DOE Water Quality Combined Funding Program to fund the design through 90% of bioretention planers in the vicinity of S 130th St to improve water quality in Riverton Creek, a tributary of the Green-Duwamish River. Once complete, the planters will slow stormwater before it is directed to conveyance pipes removing fine sediment and dissolved metals from previously untreated stormwater. This project came out of the Riverton Basin SMAP and is in the existing Capital Improvement Program. In July 2025, the City was notified that we received the full grant award. FISCAL IMPACT The City was awarded a $294,950 grant from the DOE for the design of the S 130th Bioretention Planters. The grant requires a 15% local city match, which is $52,050. The Project CIP, which comes from Surface Water Fees, is sufficient to cover the match. Project Budget DOE Grant Award $294,950.00 City Match $ 52,050.00 Total $347,000.00 Fund Source CIP Budget (412 Funds) RECOMMENDATION Council is being asked to accept a DOE Water Quality Grant Award in the amount of $294,950.00 and consider this item on the Consent Agenda at the October 6th, 2025 Regular Council Meeting. Attachments: 2025-2030 CIP Pg. 152 Vicinity and Map 10 DESCRIPTION: JUSTIFICATION: CITY OF TUKWILA CAPITAL PROJECT SUMMARY 2025 to 2030 Riverton Stormwater Management Action Plan - PROJECT: Project# 82541203 Program CIP Project Manager Sherry Edquid Department Surface Water This CI P is a program to implement the Stormwater Management Action Plan (SMAP) a new requirement under the NPDES Permit. The SMAP directed the City to invest and prioritize one stream system the city selected Riverton. The SMAP for Riverton Creek identifies four priority stormwater retrofits and a handful of lower priority stormwater retrofits with the goal of improving water quality while accommodating future growth in the basin. Of the four short-term projects we would begin design and possibly construction for two of the four projects over the course of the next six years. Washington State Department of Ecology will likely require us via the NPDES permit to begin implementing the SMAP necessitating the need to begin design and construction these short-term retrofit projects. The SMAP was also included as part of the Surface Water Comprehensive Ran (SWOP), STATUS: The SMAP provided a basic project description and cost estim ate for these projects. MAINTENANCE IMPACT: Surface Water and Transportation COMMENT: FINANCIAL (in thousands) 1 am proposing to implement these two projects SMAP-4 Tukwila International ulevard: Bust Stop 60983 Water Quality Retrofit and SMAP-5 South 130th St Right of Way Bioretention Planters. 2025 2026 2027 2028 2029 2030 Beyond TOTAL Project Costs Project Mgmt (Staff Time/Cost) Design Planning Land (R/W) Construction Mgmt. Construction Contingency $ 20 $ 230 $ 10 $ - $ 20 $ 130 $ 10 $ 120 $ 1,200 $ 100 $ 40 $ - $ - $ 35 $ 375 $ 40 $ 100 $ 390 $ 10 $ 10 $ 155 $ 1,575 $ 140 Total Project Costs $ 260 $ 50 $ 1,580 $ 490 $ 2,380 Project Funding Proposed Grant Utility Revenues General Fund Transfer $ 208 $ 52 $ - $ 40 $ 1,264 $ 158 $ 158 $ 392 $ 98 $ - $ 1,904 $ 318 $ 158 Total Project Funding $ 260 $ 50 $ 1,580 $ 490 $ 2,380 City of Burien City of SeaTac FIGURE 5 R. R IT P R, JECTS TUKWILA SMAP 1 33383 TUIK Ill„„„A, AS ElJ N Data Sago. Date 12(19/2023 DscImmer Th,s data ts not to survey accuracy and IS meant for plann[ng purposes only K PR(11213300,33383 GADLAGIS1MX1,33383 Tukwila Known Issues Da. aprx Ake eet), P1-'9 a;91417ie ElementarySchool re: r j Tukwila City Limits =I Riverton Creek Basin Parcels Short -Term Retrofit Projects 0 Long -Term Retrofit Projects — Stream / Watercourse Streets 6 „If 6 Otak 7jggrillfr VT! jrlik P'Jl, Ja tIkt Ji�Yi/l/", o i m�atran i a�iiis�l � 6�4";� 4' WIDTH STREET SIDE STORMWATER PLANTERS TOTAL AREA: 4,000 SF HvEbVIIDf rJR� Otak IId�o �p �rd J 'IYVr S 130TH ST il9llll/ ",IJQA Ord I"nir/l� • `` �i o ryr 2 FT CONTOURS TAXLOTS EXISTING STORM DITCH EXISTING STORM PIPE PROPOSED STORM PIPE oim/. G t r ire 0/011IMN APPROXIMATELY 940 LF PROPOSED ,») r,04 Ali,,. mi EXISTING PRIVATE STORMWATER VAULT TRACT f Wig'" EXISTING STORM CATCH BASIN SCALE EXISTING STORM MANHOLE PROPOSED MANHOLE PROPOSED STORMWATER PLANTER (BIORETENTION) SMAP 5 Tukwila Stormwater Management Action Plan 13 City of Tukwila City Council Transportation & Infrastructure Services Committee Meeting Minutes September 22, 2025, 5:30 p.m. - Hybrid Meeting; City Council Conference Room & MS Teams Councilmembers Present Mohamed Abdi, Chair; Hannah Hedrick, Joe Camacho Staff Present Jen Tetatzin, Griffin Lerner, Eric Compton, Pete Mayer I. PRESENTATION II. BUSINESS AGENDA A. Ordinance: Franchise Agreement Staff is seeking approval of an ordinance granting Level 3 Communications a franchise agreement with a term of 5 years. Committee Recommendation Unanimous approval. Forward to October 13, 2025 Committee of the Whole. B. Grant Award: South 130th Bioretention Planters Staff is seeking approval to accept $294,950 from the Washington State Department of *Ecology Water Quality Combined Grant to fund design through 90% of bioretention planters in the vicinity of S. 130th St. Committee Recommendation Unanimous approval. Forward to October 6, 2025 Regular Meeting Consent Agenda. C. Grant Award: Stormwater Outfall Water Quality Retrofit Project Staff is seeking approval to accept $436,152.00 from the Washington State Department of Ecology Water Quality Combined Grant to fund the design through 90% of four stormwater outfalls. Committee Recommendation Unanimous approval. Forward to October 6, 2025 Regular Meeting Consent Agenda. The meeting adjourned at 5:50 p.m. if Committee Chair Approval Minutes by LH 14