The Culbertson Diversion Dam is a concrete structure containing two 14- by 9.5-foot radial-type spillway gates and a 30-inch-diameter bypass conduit. The canal headworks is a concrete structure containing two 10- by 6-foot radial gates and a spillway stilling basin. The diversion capacity required is 400 cubic feet per second at water surface elevation 2740.2. The spillway gates are designed for a capacity of 1,250 cubic feet per second, at water surface elevation 2741.0 and tailwater at elevation 2737.0. The remainder of the flood will flow over the wasteway and low-lying flood plain to the south of the main channel and will re-enter the main channel downstream from the diversion dam. The 30-inch bypass conduit is required to meet downstream water needs and to assist in sluicing deposited material through the dam. The canal is 27.3 miles long.
Hydraulic Height (Normal Operating Depth at Dam)
Hydraulics & Hydrology
Spillway Capacity at Elevation
1250 cfs at 2740.2
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