As of March 2019, the fish ladder is in full operation and allows fish to bypass the dam. Final completion of the project is anticipated in May 2019.
What to Expect During Construction
The Alameda Creek Diversion Dam is located on SFPUC lands adjacent to the Sunol Regional Wilderness Park in Sunol and helps collect water in Calaveras Reservoir through a long tunnel.
Sunol Regional Wilderness remains open during construction. If you frequent Sunol Regional Wilderness, you may have noticed increased activity in the park.
- Park users should anticipate seeing increased construction traffic from the Geary Road entrance and along Camp Ohlone Road, which is the main construction access road
- Temporary Trail Closures are necessary for large vehicle access and for road improvements. Please use alternative trails to Little Yosemite, such as Canyon View Trail, during these times
- Please pay attention to construction flaggers and park signage
- Construction activity is expected Monday thru Friday from 6AM to dusk
The project will entail partial demolition of the existing Alameda Creek Diversion Tunnel’s intake structure, construction of a fish ladder and modified screens for steelhead migration into and out of the Alameda Creek Watershed. to facilitate fish passage around the existing Alameda Creek Diversion Dam, a new diversion structure comprised of four tee-shaped fish screens, an intake manifold and wet well, and three adjoining, concrete-box culverts in the bed of Alameda Creek. Work also includes improvements to the access road, retaining and landslide stabilization walls, improvements to Geary and Camp Ohlone Roads.