HomeMy WebLinkAboutTIC 2020-05-04 Item 2B - Grant Applications - South 131st Place Drainage ImprovementsCity of Tukwila Allan Ekberg, Mayor
Public Works Department - Henry Hash, Director
INFORMATIONAL MEMORANDUM
TO: Transportation and Infrastructure Committee
FROM: Henry Hash, Public Works Director
BY: Ryan Larson, Senior Program Manager
CC: Mayor Ekberg
DATE: May 1, 2020
SUBJECT: Surface Water Fund - S 131st PI Drainage Improvements
Project No. 91641204
Grant Application
ISSUE
Authorize the submittal of grant applications to the King County Flood Control District (2020 Flood
Reduction Grants) and other future grants that become available.
BACKGROUND
Southgate Creek flows along the western shoulder and under S 131st Place and then onto the Normed
site (also near Far West Paint). During large storm events, the Southgate creek overflows its bank and
flows over S 131st Place and through the Normed access road, resulting in debris deposition on the
roadway and the private access road. This flooding is the result of a combination of excessive
sedimentation within the downstream private property portion of the stream and within the roadway
cross culvert, as well as a lack of sufficient freeboard to contain the creek during high flows.
DISCUSSION
Storm drainage improvements to S 131It Place are required to increase the available creek freeboard
as well as replacing the existing cross culvert. All stormwater improvements to the existing creek and
cross culvert will require a Hydraulic Project Approval (HPA) from the Washington Department of Fish
and Wildlife.
Grant applications are being sought from various organizations and the King County Flood Control
District. Design consultant selection is anticipated to begin in the Summer of 2020 and construction is
planned for 2022.
FISCAL IMPACT
The S 131s' Place Drainage Improvement project has $790,000 available in surface water funding for
design and construction. The proposed grant funds will provide additional funding for the project.
Matching funds are encouraged, but not required for the 2020 Flood Reduction Grants.
RECOMMENDATION
Committee approval to seek available grant funding through King County Flood Control District and
other grant opportunities that may become available for the South 131It Place Drainage Improvement
Project.
Attachment: Pg.100, 2019 CIP
Mips://tukwilawa.sharepoint.com/sites/publicworks/enginecringfPW Drop Box/01 TIC Agenda/Agenda Items/TIC 05-04-2020/S. 131st Drainage Improvements/Info Memo_S 131st PI Drainage Improvements
grant app.docx 5
CITY OF TUKWILA CAPITAL PROJECT SUMMARY
2019 to 2024
PROJECT: S 131st Place Drainage Improvements Project No. 91641204
DESCRIPTION: Design and replace an existing 36" culvert under S. 131 st Pl. Raise the roadway approximately 18" and/or
provide a concrete wall or other means to keep Southgate Creek within its banks during storm events.
JUSTIFICATION: Southgate Creek overtops its bank several times per year during storm events and runs through private property.
Debris is deposited within a private driveway and storm system.
STATUS: Maintenance is performed annually on the creek to remove excess sedimentation to reduce the likelihood
of flooding.
MAINT. IMPACT: Reduce the frequency of stream sediment removal and storm cleanup.
COMMENT: Project will require an HPA. Look at combining with a future overlay project to reduce overall costs.
FINANCIAL Through Estimated
(in $000's) 2017 2018 2019 2020 2021 2022 2023 2024 BEYOND TOTAL
EXPENSES
Design
100
100
Land (R/W)
0
Const. Mgmt.
90
90
Construction
600
600
TOTAL EXPENSES
1 01
01
01
100
1 690
1 01
01
01
01
790
FUND SOURCES
Awarded Grant
0
Proposed Grant
0
Mitigation Actual
0
Mitigation Expected
0
City Oper. Revenue
0
0
0
100
690
0
0
0
0
790
TOTAL SOURCES
1 01
01
01
100
1 690
1 01
01
01
01
790
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2019 - 2024 Capital Improvement Program 100 6