| OCR Text |
Show 216 UPDATING THE HOOVER DAM DOCUMENTS Summary - Colorado River System Consumptive Uses and Losses Report, Public Law 90-537 Water Use By States, Basins, and Tributaries1 (1. 000 Acre-feet) WATER YEAR STATE AND BASIN OF USE 1971 1972 1973 1974 1975 Average 1971-75 Other - Reservoir Evaporation and Channel Loss 1916 1919 2066 2175 2087 2033 14966 15555 15437 16604 15781 15669 Water Passing to Mexico Treaty Minutes 218, 241, and 242 Regulatory Waste 1561 (1501) (55) (5) 1600 (1515) (79) (6) 1594 (1444) (120) (30) 1720 (1563) (151) (6) 1656 (1429) (214) (13) 1626 (1490) (124) (12) Total - Colorado River System and Water Passing to Mexico 16527 17155 17031 18324 17437 17295 'Onsite consumptive uses and losses; includes water uses satisfied by ground-water overdraft. Section 602(b)(l) directs the Secretary to prepare reports as to the annual consumptive uses and losses of water from the Colorado River System. The first report covering water years 1971 to 1975, inclusive, has been completed and made available to the Basin States in 1977. The Report reflects the Department of the Interior's best estimates of actual consumptive uses and losses with the Colorado River Basin. The reliability of the estimates is affected by the availability of data and the current capabilities of data evaluation. The 38-page Report appears as Appendix 1204. H.10. Execution of CAP Repayment Contract Following authorization on April 13, 1972, by the Arizona Legislature, a Central Arizona Water Conservation District was formed by actions of the Boards of Supervisors of Maricopa, Pima, and Pinal Counties. On December 15, 1972, the District and the Department of the Interior signed a contract for the construction of the CAP and for the repayment of its reimbursable costs. H.ll. How the Various Interests Benefited from CAP Legislation As indicated by the zigzag path of the Colorado Riber Basin Project Act, it was a product of compromise among the various interest groups it affected. All of the Basin States suffered a defeat when they were unable to authorize immediate study of inter-Basin transfers of water and to construct Bridge Canyon and Marble Canyon hydroelectric dams to provide revenues to finance augmentation of the mainstream. However, every major interest gained something, as summarized as follows: Arizona - Authorization of construction of CAP. California - A guarantee of priority of 4.4 maf of water annually in times of water shortage, even if CAP had to stop its water diversions. Upper Basin - Obtained criteria governing operation of dams so as to protect Upper Basin users against excessive drawdowns. Five reclamation projects authorized in Colorado. Uintah Project authorized and Dixie Project reauthorized in Utah. New Mexico to get additional water. Satisfaction of Mexican Treaty of 1944 made a National obligation. Northwest - 10-year moratorium on study of water importations proposals. Conservation Groups - Deletion of authorization of two dams on the river, one above and one below Grand Canyon (Congressional Quarterly, Inc., November 1, 1968, page 3019). |
