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o02olii 64 ASSEMBLY INTERIM COMMITTEE ON WATER time of the action of the House Committee on Interior and Insular .Af- fairs in 1951, in postponing further action on the Central Arizona Proj- ect until such time as .Arizona's right to the use .of Lower Colorado HiveI' water was adjudicated. During the years following the 1947 report .Arizona experienced a great population growth. In March 1961 the Arizona Legislature made $100,000 available to the .Arizona Interstate Stream Commission to contribute to the Bureau of Reclamation to update the 1947 report. The State of Arizona also contributed $100,000 fOI; a statewide inventory of water resources under which much of thc basic data used in re- examining thc 1947 report were assembled. In addition, $30,000 was contributed by New Mexico to help finance the report. As a result of this additional funding Region Three of the U.S. Bureau of Reclamation submitted a "Supplemental Report on the Cen- tral .Arizona Project" to the Commissioner of Reclamation in June 1963.2 It is this report that formed the basis for the Central Arizona Project which is included in the various proposals for the Pacific Southwest development. The basic revenue producing feature of the project is the High Bridge Canyon Dam, reservoir and power plant. The disposition of this revenue is the major difference betw.een the Central Arizona Proj- ect as proposed in S. 1658, as intro.dticed, and the Central Arizona Project as proposed in the regional plans. Under the regional proposals the Marble 9anyon Dam would be cqns~tucte4)n additiOI!)to. Brijlge Canyon Dam, and the excess. in power, revenues from the two dams would be deposited in the development fuhd. . The High Bridge Canyon Dam reservoir and power plant would be located in the lower Granite Gorge of the,Colorado IRiver northeast 'of Kingman, Arizona and"at the upper end of Lake Mead, 117lmiles u!,i-; stream from Hoover Dam. It would bea' cbncrete,thin archtdam with a reservoir capacity of 3,710,000 acre-feet. The 1.5 millio'n kilowatt! capacity power plant will generate an estimated. 5,8 billion kilowatt hours annually. ,..", ...,'J. The backbone canal system of the Central .Arizona Project would pump water from Lake Havasu, also the .source of the .Metropolitan. Water District's Colorado River Aqueduct, in a series of three pump' ing plants having a static lift of 969 feet. The water would be con- veyed 219 miles by the Granite Reef Aqu'educt from Lake Havasu to Granite Recf Dam and would have a cap.acity of 1,800 cubic feet per s.econd (cfs). Along this canal at three d,elivery. points, p;ll~ of ~he delivered water at the low power drops would generate power. Water requirkqjor the Salt River Valley would be' !'Jelivered at G~.~J;lite Re~r '1'he remaim~er woule! be. siphoned under the Salt River and tJ:anspor~ed south:throulgh a Salt-Uila aqueduct which extends from the BaIt Hiver to Picacho. Reservoir. This aqueduct would have..a capaCitY' of 1,275 cubic feet per second. . The fi.:al portion of the aqueduct system would be a closed conduit (the remaining portions of the aqueduct are open c~ncrete design) ex- tending from near Picacho Reservoir to the City of .Tucson. This aque- duct, would deliver 100,000 acre-feet of water annually for lllUnicipal 2 For:-~omplete description of the project see this report.