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0U20G6 ARIZONA v. CALIFORNIA AND PACIFIC SOUTHWEST WATER PROBLEMS 69 Marble Canyon Darn on the Colorado River, which is added to the Central Arizona Project in this plan (as well as the other regional plans), would be a thin arch concrete design darn rising 310 feet above the stream bed with a reservoir of 363,000 acre-feet capacity. It would have a power plant with an installed capacity of 600,000 kilowatts which is estimated to generate 2,310,000,000 kilowatt hours annually. One of the features of the plan, as presented, was the export of water from northern California to Arizona in the Havasu Aqueduct, which would have_ paralleled the general route of the existing Colorado River Aqueduct of the Metropolitan Water District of Southern Cali- fornia but would have transported water in the opposite direction. The opposition of Californians to this proposal was unanimous in that it was illogical at best. As the administrator of the California Resources Agency indicated to this committee, "It prematurely and unnecessarily committed the plan to an exportation to Arizona of water from northern California." The Revised Pacific Southwest Water Plan and the recent enlargement of the Sate Water Project by the state have indicated that the pre- liminary figures on which the plan was based overstated the water requirements of southern California and the adverse affect of Arizona v. California. While the original Pacific Southwest Water Plan con- templated import of water into southern California in the amount of 1.2 million acre-feet and export from California to Arizona of the like amount, it will be seen that subsequent proposals, including the Revised Pacific Southwest Water Plan, contemplate much smaller importations to southern California. As indicated below, the state's overall 230,000 acre-foot enlargement of the California aqueduct provided a satisfac- tory additional water supply to meet the expected needs of southern California through 1990. Two projects included in the plan should be briefly described at this time as they are included in all of the regional proposals. Although located in western New Mexico, Hooker Darn and reservoir is proposed as a part of the Central Arizona Project. Located on the upper Gila River it isa multipurpose reservoir to provide flood control, river regulation, recreation and fish and wildlife benefits. The capital cost of the darn and reservoir is estimated at about $28 million. The Dixie Project would be located on the Virgin and Santa Clara Rivers in southwest Utah.5. It will consist of the multipurpose Virgin City Dam, plus smaller darns and canals. Power will be generated at the dam and at canal drops. The project would provide about 5,000 acre-feet of municipal and industrial water annually. It would also provide supplemental water supplies to 9,400 presently irrigated acres and full supply to about 11,600 acres of new irrigated land. The capital cost of the project is estimated to be $45 million. 5a A separate Department of the Interior report on this project, 85th Congress, 1st Session (House Document No. 86) gives complete detail on the project.