HomeMy WebLinkAboutTIS 2025-09-22 Item 1C - Grant Acceptance - Department of Ecology Grant for Stormwater Outfall Water Quality RetrofitThomas 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: Surface Water Fund - Stormwater Outfall Water Quality Retrofit Project
Project No. 91241202
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 $436,152.
BACKGROUND
In 2017, Council authorized staff to accept a DOE grant which identified 8 priority stormwater outfalls
and funded the design of four stormwater outfall sites through 90%. In 2022, Council authorized staff to
accept a DOE grant funding the final design and construction of two of the sites — Tukwila International
Boulevard and Interurban Avenue. In 2024, Council authorized staff to accept a DOE grant funding the
final design and construction of the third and fourth sites — E Marginal Way and Fort Dent Way.
DISCUSSION
In October 2024, staff submitted an application to the DOE Water Quality Combined Funding Program
to fund the design through 90% of the next four stormwater outfall sites — West Valley Highway,
Christensen Road 1, Christensen Road 2, and 48th St. In July 2025, the City was notified that we
received the full grant award to fund the design of these sites.
FISCAL IMPACT
The City was awarded a $436,152 grant from the DOE for the design of four stormwater outfalls. The
grant requires a 15% local city match, which is $76,968. The Project CIP, which comes from Surface
Water Fees, is sufficient to cover the match.
Project Budget
DOE Grant Award $436,152.00
City Match $ 76,968.00
Total $513,120.00
Fund Source
CIP Budget (412 Funds)
RECOMMENDATION
Council is being asked to accept a DOE Water Quality Grant Award in the amount of $436,152 and
consider this item on the Consent Agenda at the October 6th, 2025 Regular Council Meeting.
Attachments: 2025-2030 CIP Pg. 146
Vicinity Map
53
CITY OF TUKWILA CAPITAL PROJECT SUMMARY
2025 to 2030
PROJECT: Stormwater Water Quality Retrofit Program Project# 91241202
Project Manager Joshua Hopkins Department Surface Water
DESCRIPTION:
Plan, design, and install water quality treatment and other stormwater conveyance improvements at
targeted drainage locations.
JUSTIFICATION: Most surface water is discharged directly to receiving water bodies untreated.
STATUS: Water quality retrofit has been added to CI P projects since 2015.
MAINTENANCE IMPACT: N/A
COMMENT: Combine with other CIP projects for design and construction, where feasible.
FINANCIAL (in thousands) 2025 2026 2027 2028 2029 2030 Beyond TOTAL
Project Costs
Project Mgmt (Staff Time/Cost)
Design
Construction Mgmt.
Construction
$ 25
$ 100
$ 100
$ 400
$ 25
$ 300
$ 300
$ 1,410
$ 25
$ 100
$ 25
$ -
$ 400
$ 1,800
$ 25
$ 100
$ 25
$ -
$ 400
$ 1,800
$ 25
$ 20
$ 15
$ 80
$ 175
$ 620
$ 1,215
$ 5,490
Total Project Costs
$ 625
$ 2,035
$ 125
$ 2,225
$ 125
$ 2,225
$ 140
$ 7,500
Project Funding
Awarded Grant
Proposed Grant
Utility Revenues
$ 125
$ 425
$ 75
$ 1,410
$ 300
$ 325
125
$ -
$ 1,530
$ 695
$ 125
$ -
$ 1,530
$ 695
140
$ 1,535
$ 3,785
$ 2,180
Total Project Funding
$ 625
$ 2,035
$ 125
$ 2,225
$ 125
$ 2,225
$ 140
$ 7,500
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TREATMENT AREA OVERVIEW MAP
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