Wellton-Mohawk Irrigation and Drainage District (WMIDD) is located in Southwestern Arizona, in the lower Sonoran desert. Our hot, dry climate is ideal for year-round growth of crops. Summer temperatures regularly reach 110 degrees; days with even a few hours of below freezing temperature are rare. The long-term average annual rainfall is less than 3 inches, and irrigation continues, at varying rates, throughout the year. Elevation of cultivated lands ranges from approximately 200 feet above sea level on the west to about 400 feet above sea level on the east.
Wellton-Mohawk's water comes from the Colorado River. Flow is diverted at the Arizona abutment of Imperial Dam, into the Gila Canal, a joint-use facility shared by five Yuma-area irrigation districts. WMIDD's share of the flow is delivered at Gila Canal Mile 15 into the Wellton-Mohawk Canal. The District was originally established to serve a maximum of 75,000 irrigable acres, or to consumptively use 300,000 acre-feet of Colorado River water. Consumptive use in the case of Wellton-Mohawk has been defined as the difference between the amount diverted and the amount returned to the Colorado River main-stem as agricultural return flows.