The Stewart Mountain Dam is a concrete thin arch dam located 41 miles northeast of Phoenix, Arizona.

The dam includes a 13,000 kilowatt (kW) hydroelectric generating unit that is operated by SRP (Salt River Project), an Arizona public utility.

The dam forms Saguaro Lake as it slows the passage of the Salt River in Maricopa County, Arizona.

A camp was built just below the dam in 1927 to house the construction workers; after the damn's completion it was turned into the Saguaro Lake Guest Ranch.

[3] The dam was listed on the National Register of Historic Places in 2017.