SCH Number 2020049025

Project Info

Title

Castaic Dam High Intake Tower Bridge Retrofit

Description

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).

5 documents in project