A view of Parker Dam, which is responsible for Lake Havasu on the Colorado River between Arizona and California. The dam is 320 feet high, 235 feet of it buried below the riverbed. The dam was completed in 1938. Lake Havasu provides a water source for both California’s Colorado River Aqueduct, as well the Central Arizona Project Aqueduct, which provides agricultural and municipal water to Tucson and Phoenix. The dam also produces a limited amount of hydroelectric power.