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Project: Corte Madera Creek Flood Risk Management Project, Phase 1

Description: The Project will reduce risk of flood damage in the Town of Ross and unincorporated Kentfield by channel improvements and widening along Corte Madera Creek (Creek), implementing a single flood mitigation project with multiple components, principally: removal of an existing U.S. Army Corps of Engineers (USACE) wooden fish ladder, removal of portions of an existing concrete channel, construction of a new floodwall or flood berm section and a storm drain pump station, and natural bed rehabilitation along sections of the Creek. Work will occur in two primary areas along the Creek, the ‘Upstream Area’ located primarily in Ross, and starting downstream of the existing Lagunitas Road Bridge, and the ‘Downstream Area’ located in Kentfield at the western boundary of the College of Marin campus. Removal of the wooden fish ladder and significant portions of concrete channel removal and channel widening, along with recreational enhancements in Allen Park to facilitate Creek improvements, will occur primarily in the Upstream Area. Relocation or retaining enhancements for existing sewer mains or drainage structures may also be included in this area, as necessary. Work in the Downstream Area will include installation of a new floodwall or flood berm on the north side of the Creek, and construction of a storm drain pump station to existing concrete channel which will not be removed in this area.

Reference Number: 3860-P1E-958

Implemented By: Marin County Flood Control and Water Conservation District

Objective: Integration of Corte Madera Creek ecological function restoration and other public riparian resource enhancements with primary objective of flood protection in Town of Ross and unincorporated Kentfield. Specific objectives include lowering Creek water surface elevation during high flows thereby reducing flood risk throughout Ross Valley – via removal and/or alteration of existing Creek infrastructure - improving Creek riparian and aquatic habitat, and enhancing access and public enjoyment of the Creek.

Total Cost: $14,060,754.00

Project Status: Project Implementation

On Time?: Yes    Within Scope?: Yes    Within Budget?: Yes

Estimated Completion: 3/31/2023    Actual Completion:

Associated Counties: Marin



Contribution SourcesContribution DateContribution Amount
  $14,060,754.00
Local Contribution2/9/2018$7,030,377.00
Prop. 1E, Stormwater/Flood Management7/2/2018$7,030,377.00



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