Aerial view of the current state of progress at the Sunnyside Flood Detention Basin Project, showing construction vehicles on a large area of dirt.

Progress update on Sunnyside Flood Detention Basin Project

Posted on November 21, 2022

Work is progressing nicely with the detention basin at the former Sunnyside Nursery, located at 3000 Sir Francis Drake Boulevard. It is nearing completion and it will be operational this rainy season. Once completed, the detention basin will hold stormwater overflows from Fairfax Creek during peak storm events by having water spill over a side...
Sunnyside basin during construction phase

Final Phase of Stormwater Basin to Begin

Posted on July 12, 2021

Development part of larger flood mitigation and public safety project near Fairfax The final phase of the Marin County Flood Control and Water Conservation District’s Sunnyside Flood Detention Basin project is expected to begin in August with a goal of improving public safety for properties along Fairfax Creek and San Anselmo Creek in the upper Ross...
excavation work in a basin

Flood mitigation project milestone and delay

Posted on January 20, 2021

Final phase of stormwater basin moving forward despite bridge project issue The Marin County Flood Control and Water Conservation District is wrapping up plans for the final phase of the Sunnyside Stormwater Detention Basin and the project is expected to open for contractor bids this summer. The basin, located at 3000 Sir Francis Drake Boulevard...
demolition activity

San Anselmo Flood Risk Reduction Project update, November 2020

Posted on November 1, 2020

The first part of the Sunnyside Detention Basin construction was completed ahead of schedule in mid-November. Work included demolition of all the existing buildings and structures, stripping and stockpiling gravel and topsoil to be re-used at the site, and excavation and off-haul of approximately 20,000 cubic yards of earth. The site was covered with mulch...
vacant residential and former nursery structures

San Anselmo flood project construction to begin

Posted on August 19, 2020

Excavation of the Fairfax flood control basin set to start in September The Marin County Flood Control and Water Conservation District will begin excavating Sunnyside Basin near Fairfax in early September as part of the San Anselmo Flood Risk Reduction Project. The excavation and relocation of 20,000 cubic yards of earth is expected to take...
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