28th Street Stormwater Infiltration Project

The City of Manhattan Beach (“City”) invites sealed proposals on the project described herein to be submitted via OpenGov. Proposals will be received until 11:00 am on Thursday, July 17, 2025 .

The City of Manhattan Beach is implementing the 28th Street Project to improve stormwater quality. The City participated with adjacent agencies, including the Cities of Hermosa Beach, Redondo Beach, and Torrance, in developing the Beach Cities Enhanced Watershed Management Program (EWMP). The EWMP identifies capital improvement projects to help improve water quality and address applicable impairments in the Santa Monica Bay, specifically related to the bacteria Total Maximum Daily Load (“TMDL”). The Beach Cities EWMP identified a beach infiltration system as a high priority capital project within the City. The detailed Project Description includes additional information regarding the Project goals, benefits, and layout. In summary, a diversion structure is proposed on the Bond Issue (“BI”) 0286 storm drain (also referred to as the 28th Street Storm Drain), which is owned and operated by the Los Angeles County Flood Control District (“LACFCD”). Flows captured through the diversion structure will be pumped into a pretreatment trash capture and sedimentation system and ultimately into a subsurface infiltration system. The diversion system will include an actuator and sliding gate to allow for maintenance. The diversion structure diverts high flows with a large four-pump system.