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File #: 25-0423    Version: 1
Type: Gen. Bus. - Staff Report Status: Agenda Ready
In control: City Council Regular Meeting
On agenda: 10/7/2025 Final action:
Title: Consideration of an Update to the 28th Street Stormwater Infiltration CIP Project (No Budget Impact) (Interim Public Works Director Semaan). (Estimated Time: 30 Mins.) RECEIVE AND FILE
Attachments: 1. PowerPoint Presentation
Date Ver.Action ByActionResultAction DetailsDetailsVideo
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TO:
Honorable Mayor and Members of the City Council

THROUGH:
Talyn Mirzakhanian, City Manager

FROM:
Ted Semaan, Interim Public Works Director
Gilbert Gamboa, Acting City Engineer
Eduardo Pech, Senior Civil Engineer

SUBJECT:Title
Consideration of an Update to the 28th Street Stormwater Infiltration CIP Project (No Budget Impact) (Interim Public Works Director Semaan).
(Estimated Time: 30 Mins.)
RECEIVE AND FILE
Body
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RECOMMENDATION:
Staff recommends that the City Council receive and file the update on the 28th Street Stormwater Infiltration Project - CIP Project No. SW21402

FISCAL IMPLICATIONS:
There are no fiscal implications associated with the recommended action.

BACKGROUND:
Stormwater discharges in Manhattan Beach are regulated by the Municipal Separate Storm Sewer System (MS4) Permit issued by the Los Angeles Regional Water Quality Control Board. Under this permit, the City is required to monitor and report water quality and adhere to strict limits on bacterial discharges into Santa Monica Bay. To fulfill these requirements, the cities of Manhattan Beach, Hermosa Beach, Redondo Beach, Torrance, and the Los Angeles County Flood Control District (LACFCD) developed the Beach Cities Watershed Management Program (WMP). The WMP identifies priority capital improvement projects aimed at reducing pollutants from stormwater discharges.

The 28th Street storm drain system, SMB-5-02 as identified in the WMP, collects storm water run-off from a tributary area of approximately 1,520 acres, approximately 60 percent of the City's stormwater flows. The tributary area also contains a small contribution from the cities of Redondo Beach and Hermosa Beach. Long-term monitoring data indicates that the 28th Street storm drain contributes to bacteria detection, which has been surpassing the Total Maximum Daily Load (TMDL) limits set by the Water Board. Due to its large drainage area and compliance risks, the WMP id...

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