Castaic Dam High Intake Tower Bridge Retrofit

Castaic Dam High Intake Tower Bridge Retrofit

Construction would occur at the tower bridge, high tower abutment, Piers 2 through 4, and Abutment 5. The tower bridge retrofits include installing restrainer cables to transfer longitudinal seismic forces to the adjacent spans or frames, retainer and catcher blocks of the tower bridge, and carbon fiber reinforcement jacketing of the piers. Carbon fiber reinforcement is an extremely strong and lightweight carbon-fiber-reinforced plastic. Each pier jacket would strengthen the pier structure to further withstand a large seismic event. It is anticipated that construction activities would take approximately 6 weeks to retrofit each pier. Once retrofitting of the piers are complete, the lake water level would return to normal conditions. The work on the tower bridge is independent of the pier work and would not be dependent on the lake drawdown schedule (described below).

Los Angeles

Southern California

California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of State Parks, Division of Boating and Waterways, California Department of Transportation, District 7 (DOT), California Department of Water Resources (DWR), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, Los Angeles Region 4 (RWQCB), California Santa Monica Mountains Conservancy (SMMC), California State Lands Commission (SLC), Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Division of Water Rights

Water Facilities