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<br />13 <br /> <br /> <br />ijl)2248 <br /> <br />. <br /> <br />Plan 4 (Sierra diversion to southern California--California Aqueduct <br />exchange)--This plan proposes to divert 1,200,000 acre-feet from <br />the major east side San Joaquin Valley streams, above about 3,000 <br />feet elevation, by a series of tunnels of progressively larger <br />capacity starting at the San Joaquin River above its junction with <br />Big Creek and intersecting the Kings, Kaweah, and Tule Rivers and <br />discharging into Isabella Reservoir. From Isabella Reservoir the <br />water would be conveyed by tunnel to the east side of the Sierra <br />Nevadas, and thence through Antelope Valley to join the California <br />Aqueduct ,near, the.. Co.tt.onw.ood..Powerplant. From that location it <br />would be conveyed through the aqueduct to Perris Reservoir. Ex- <br />change water for the areas now being served by the east side <br />streams from which tunnel diversions are contemplated under this <br />plan would need to be provided. <br /> <br />This tunnel diversion plan would require a series of tunnels <br />totaling 140 miles in length from San Joaquin River to Isabella <br />Reservoir on the Kern River. Associated with these tunnels would <br />be 11 diversion dams for diverting water from each of the streams. <br />From Isabella Reservoir a 34-mile tunnel would convey the water <br />southeasterly through the Sierra Nevadas to Cottonwood Creek, <br />about 20 miles north of the town of Mojave. From this location <br />the water would be lifted 650 feet and oonveyed by a 75-mile, <br />2,000 c.f.s. canal to join the California Aqueduct below the <br />Cottonwood Powerplant near Fairmont, Los Angeles County. The aque- <br />duct would be increased 2,000 c.f.s. to convey the water to Perris <br />Reservoir. The capital cost of the Sierra diversion tunnels and <br />conveyance facilities to southern California (exclusive of exchange <br />and storage facilities) is estimated on a reconnaissance basis to <br />be $1,010,000,000, and the annual OM&R $2,100,000, not including <br />cost of pumping energy. The net cost of pumping is estimated to <br />be zero. <br /> <br />. <br /> <br />Exchange water for the areas now served below the points of <br />diversion on the east side southern San Joaquin Valley streams <br />would be conveyed via the west side facilities. A 3,000 c.f.s. <br />incremental increase would be made in the California Aqueduct <br />from the Delta to Wheeler Ridge Pumping Plant. At that location <br />a new canal would be constructed crossing the Kern, Tule, and <br />Kaweah Rivers and terminating at Kings River. A pumping plant <br />with a head of about 50 feet would be required near the Kings River <br />to lift water into the higher elevation Kings River service area <br />canals. <br /> <br />The estimated capital cost (reconnaissance) for these exchange <br />facilities is $260,000,000, including the estimated amount required <br />to offset the adverse effect on existing powerplants below the <br />tunnel diversions. The annual OM&R costs are estimated at $1,400,000. <br />Pumping costs are estimated to approximate $6,100,000. <br />