San Francisco Bay Joint Venture Project 94 San Francisco Bay Joint Venture Projects 2003-02-01 2010-02-01 Mitch Avalon Mitch Avalon maval@pw.cccounty.us Contra Costa County Flood Control and Water Conservation District

US Sandy Scoggin sscoggin@sfbayjv.org CALFED - Bay Delta Authority Funder Contra Costa County Flood Control and Water Conservation District Lead agency Contra Costa County Sanitation District Cooperator Friends of the Creeks Cooperator US Army Corps of Engineers Cooperator Walnut Creek, City of Cooperator Unknown Unknown 0 Masterplan enhancement followed by restoration, levee setback, sediment removal to clear portion of channel, acquisition of adjacent wetland for salt marsh harvest mouse and trails adjacent to creek. Studies with the US Army Corps of Engineers are ongoing. Work has been completed on a $260k CalFed grant - study grant. he Lower Walnut Creek Project incorporates a new way of approaching the traditional methods of operating and maintaining a flood control facility. The existing channel is a classic Army Corps of Engineers trapezoidal earth channel that requires ongoing de-silting maintenance. The alternative approach will be to move the channel levees back in the lower reaches to provide additional capacity for floodwaters and to create floodplains. This approach will provide the necessary capacity to handle floodwaters while reducing de-silting costs and creating additional wetlands, riparian habitat and revegetation potential. Other project components include improving fish passage and habitat and increasing recreational opportunities. Unknown 90 -90 180 -180 Wetlands Habitat Protection Habitat Enhancement Habitat Restoration Creek and Lake - Creek and riparian zone Unknown - Unknown habitat 0 Contra Costa County CalEDLN project standard 1.0RC1 2009-11-06 Sandra Scoggin