Roosevelt Lake is at 43% capacity as of May 27, the second-lowest summer-start elevation since 2004, after back-to-back seasons of record-low winter runoff. SRP says the system has contingencies in place and is also preparing for a planned autumn drawdown of Canyon Lake for routine dam maintenance.
Salt River · Salt River Project
Theodore Roosevelt Lake
Theodore Roosevelt Dam · 1.65 MAF capacity at full pool
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About Roosevelt
Theodore Roosevelt Lake is the largest reservoir in the Salt and Verde river system, the headwaters reservoir for the Salt River Project chain that supplies the Phoenix metro. It sits in the Tonto Basin northeast of Phoenix.
Theodore Roosevelt Dam was completed in 1911 as the first major project of the federal Reclamation program. The dam was raised by 77 feet in a 1996 modification, increasing the reservoir's storage capacity. Day-to-day operations are managed by the Salt River Project.
Daily storage and elevation values come from SRP's Daily Water Report. AZMap presents a percent-of-capacity readout. Releases flow into Apache, Canyon, and Saguaro reservoirs downstream and ultimately into the Phoenix-area Salt River canal system.
Recent coverage
Coverage from federal agencies and named news outlets. AZMap is not the publisher.
- Roosevelt Lake water levels drop to 43% capacity after record low runoff
- SRP confident in Valley's water supply despite low reservoir levels
Roosevelt Lake was at 45% capacity in late April, down from 68% a year earlier and the lowest late-April level since 2018. SRP says the half-full system holds about 1.5 years of supply and that groundwater can offset surface shortfalls during dry years.
- SRP water reserves under pressure after driest winter on record
SRP's storage system dropped to 54% capacity entering 2026, down from 70-75% a year earlier, after a record-dry 2025 winter and a weak monsoon season. Officials say groundwater pumping may need to increase significantly by summer if snowpack and spring runoff fail to recover.
