Tat Momolikat Dam

Tat Momolikot Dam was designed and constructed by the Corps of Engineers. It was authorized by Flood Control Act of 1965, Public Law 89-298, Eighty-ninth Congress, First Session, approved October 1965. Construction of the dam began on September 27, 1972 and was completed on June 27, 1974. The dam is located on the Papago Indian Reservation in Pinal County, Arizona, about 65 miles south of Phoenix, 60 miles northwest of Tucson, and 20 miles south of Casa Grade . It was constructed as a multiple-purpose reservoir project to provide protection against floods to downstream lands and improvements; water conservation storage; development of irrigable lands; recreation; and fish and wildlife facilities. The dam also provides partial flood protection to development in the overflow area, which for the standard project flood would extend to Santa Cruz Wash, about 33 miles to the north, covering 57,000 acres (location map).

Operating Agencies

The operating agencies for Tat Momolikot Dam are the Bureau of Indian Affairs (BIA) and the Corps of Engineers (COE). The BIA is responsible for the operation and maintenance of the dam, reservior, and intake and outake works. The Corps has agreed to assist the BIA in the operation of the dam, if requested, and in the collection of hydrologic data.

The current water control manual for Tat Momolikot Dam was approved in December 1990.