The Bureau of Reclamation, formerly the United States Reclamation Service, is a federal agency under the U.S. Department of the Interior, which oversees water resource management, specifically as it applies to the oversight and operation of the diversion, delivery, and storage projects that it has built throughout the western United States for irrigation, water supply, and attendant hydroelectric power generation. It is currently the U.S.'s largest wholesaler of water, bringing water to more than 31 million people, and providing one in five Western farmers with irrigation water for 10 million acres of farmland, which produce 60% of the nation's vegetables and 25% of its fruits and nuts. The Bureau is also the second largest producer of hydroelectric power in the western U.S.

Elwood Mead was an American professor, government official, and engineer known for heading the United States Bureau of Reclamation (USBR) from 1924 until his death in 1936. During his tenure, he oversaw some of the most complex projects the Bureau of Reclamation has undertaken. These included the Hoover, Grand Coulee and Owyhee dams.