The proposal for Glen Canyon Dam was most vocally supported by the state of Arizona, which wished to get Colorado River water to Phoenix and Tucson, located hundreds of miles away from the Colorado in the center of the state. Glen Canyon Dam would regulate river flow between Lee's Ferry and Lake Mead, where the Colorado drops some , allowing the future construction of two additional hydroelectric dams, at Marble Canyon and Bridge Canyon. These two dams would be partially inside Grand Canyon National Park. Glen, Marble and Bridge together would provide the power necessary to pump water to where it was needed in central Arizona. In 1963, Arizona's congressional delegation proposed these dams as part of the Central Arizona Project to accomplish these goals. The state of California opposed the project, as it would eliminate the "surplus" water in the Colorado (really the Upper Basin's yet unused supplies) it had gotten accustomed to using.