Located just above Imperial Dam on the California/Arizona border, both Senator Wash and Squaw Lake are off-river water storage reservoirs designed to regulate the flow of Colorado River water as it passes through the dam and toward the All-American Canal. Both reservoirs have designated recreation areas that include several camping zones and day-use areas that are best known for their boating access and wildlife viewing.
Senator Wash and Squaw Lake are a part of the Imperial Dam Storage Complex, which consists of additional storage reservoirs and diversion canals such as the All-American Canal and the Gila Canal that deliver water to California, Arizona and Mexico.
A federal process is underway to rename Squaw Lake.
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