Contractor: San Bernardino County Special Districts
Demolition of 160CF concrete bulkhead and 200LF of 12″ piping inside tunnel. Install 183LF of 30″ pipe in tunnel and construct new 14ft bulkhead. Concrete valve vault with a 36″ tee and three 36″ butterfly valves and a 30″ blow-off pipe. 206 LF of buried 30″pipe, stone headwall, rip rap, minor grading, and drainage improvements.
Global Diving and Salvage (installing underwater plugs in tunnel and replacing intake grate)
HPS Inc. ( Hydro Demolitions of bulkheads in tunnel)
Cellcrete (tunnel slurry)