Roosevelt Dam, which rises 357 feet, was the first structure completed as a part of the Salt River Project (SRP). The dam, which was completed in 1911 and then expanded from 1989 to 1996, creates the largest storage reservoir in the SRP with a total capacity of 1.6 million acre-feet.
Roughly 200 miles long, the Salt River is the largest tributary of the Gila River. The Salt River used to be perennial, flowing all the way to its terminus at the Gila River. However, the construction of several dams, including Roosevelt Dam, and human water uses have turned the river intermittent over stretches.
The SRP is a utility cooperative that acts as central Arizona’s main water provider. The cooperative owns and operates four major reservoirs along the Salt River that were created to store water for the Phoenix metropolitan area. These four reservoirs—Roosevelt Lake, Apache Lake, Canyon Lake, and Saguaro Lake—have a combined storage capacity of around 3.3 million acre-feet.
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