SRP was established in 1903 to coordinate the management of water supplies for shareholders of the Salt River Valley Water Users’ Association.

Initially, SRP’s focus was on the operation and management of Theodore Roosevelt Dam, the cornerstone of SRP’s water supply infrastructure, and the water delivery system comprising the network of canals, laterals, and delivery gates in the Salt River Valley.

Over the past 100 years, SRP’s expertise has grown into the conjunctive management of the 13,000-square-mile Salt River and Verde River watershed that produces SRP’s surface water supplies; seven dams and reservoirs; more than 250 groundwater wells; three water-banking projects; and a vast electric generation, transmission, and distribution system spanning multiple states to serve a 2,900-square-mile electric and water service area in central Arizona.