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<br />002571 <br /> <br />At present there are no imports of water from outside sources. <br /> <br />Water Use--Estimated present agricultural, municipal, and <br />industrial requirements for the Lower Colorado River tributary <br />areas are presented in table 8. For recreational and fishing pur- <br />poses, there are about 13,900 surface acres available in the Lower <br />Colorado River tributary area. About 12,000 acres are on multiple- <br />purpose reservoirs, with no allocations for fish and wildlife, and <br />about 1,900 surface acres are on 17 fishing lakes wherein the <br />Arizona and New Mexico fish and game departments have surface rights <br />On 1,092 acres. Four State fish hatcheries circulate 25 c.f.s., <br />and two Federal fish hatcheries circulate 7.5 c.f.s. <br /> <br />Southern California <br /> <br />Local Water Supply--Surface-water supplies in the southern <br />California area are minor and, with a few exceptions, fully utilized. <br /> <br />Present ground-water use in southern California is estimated to <br />be about 1,900,000 acre-feet annually. It is further estimated that <br />about 500,000 acre-feet of this annual use represents overdraft. <br />A comprehensive program of artificial recharge with Colorado River <br />imports has been increasingly practiced since 1949. From 1949 to <br />1962, approximately 1,700,000 acre-feet have been percolated to <br />ground-water storage in Los Angeles and Orange Counties. Approxi- <br />mately 900,000 acre-feet of this quantity were percolated during the <br />last 3-year period ending in June 1962. During the 1952-62 period <br />approximately 34,000 acre-feet were injected to form a fresh-water <br />barrier against salt-water intrusion. <br /> <br />The estimated present total local water supply is presented in <br />table 9. <br /> <br />Import Water Supply--The Los Angeles Aqueduct was completed in <br />1913 and delivers water to the Los Angeles area from Owens Valley <br />some 240 miles to the north and on the east slope of the Sierra <br />Nevada Mountains. During the water year 1961-62, the Los Angeles <br />Aqueduct delivered 343,000 acre-feet of water to the Los Angeles <br />area. <br /> <br />The Colorado River Aqueduct extends 242 miles from the intake <br />at Lake Havasu to the terminal reservoir, Lake Mathews, near <br />Riverside. It serves the Los Angeles and San Diego metropolitan <br />areas. During the water year 1961 the Colorado River Aqueduct <br />diverted 1,068,600 acre-feet of water. <br /> <br />The All-American Canal imports water to Imperial and Coachella <br />Valleys from the Colorado River. During the water year 1961 the <br />All-American conveyed 3,635,600 acre-feet of water below Pilot Knob <br />Wasteway. <br /> <br />111-6 <br />