Horse Mesa is a Federal-owned concrete dam located on the Salt River in Maricopa, Arizona. Completed in 1926, this hydroelectric structure stands at a towering height of 305 feet, with a storage capacity of 261,335 acre-feet. The dam serves multiple purposes including hydroelectric power generation, irrigation, and water supply for the region.

With a hazard potential rated as high and a risk assessment indicating a very high risk level, Horse Mesa is a critical infrastructure requiring constant monitoring and maintenance. The dam underwent modifications in 1999 for foundation and seismic upgrades to ensure its structural integrity and safety. Bureau of Reclamation is the primary agency responsible for the operation, inspection, and regulatory oversight of this essential water resource.

Water resource and climate enthusiasts would be fascinated by the historical significance and engineering marvel of Horse Mesa. As a key component of the water management system in Arizona, this dam plays a crucial role in providing water for irrigation, power generation, and municipal use. Its strategic location on the Salt River highlights the importance of sustainable water resource management in arid regions like Maricopa County.