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17 002253 . Plan 5 (Sierra diversion to Lake Havasu)--This plan proposes to divert 1,200,000 acre-feet from the major east side San Joaquin Valley streams, above about 3,000 feet elevation, by a series of tunnels of progressively larger capacity starting at the San Joaquin River above its junction with Big Creck and intersecting the Kings, Kaweah, and Tule Rivers and discharging into Isabella Reservoir. From Isabella Reservoir the water would be conveyed by tunnel to the east side of the Sierra Nevadas to a point about 20 miles north of Mojave. From that location it would be conveyed east and south to Lake Havasu on the Colorado River. Exchange water for the areas now being served by the east side streams from which tunnel diversions are contemplated under this plan would need to be provided. r This tunnel diversion plan would require a series of tunnels totaling 140 miles in length from San Joaquin River to Isabella Reservoir on the Kern River. Associated with these tunnels would be 11 diversion dams for diverting water from each of the streams. From Isabella Reservoir a 34-mile tunnel would convey the water southeasterly through the Sierra Nevadas to Cottonwood Creek, about 20 miles north of the town of Mojave. From this location the water would be lifted 185 feet and conveyed 316 miles through a 2,000 c.f.s. canal to Lake Havasu on the Colorado River. The available head makes possible three power drops in this reach--Newberry Pm<erplant 66,000 kw., 20 miles east of Barstow; Bagdad Powerplant 140,000 kw., about 80 miles east of Barstow; and Lake Havasu Power- plant 72,000 kw., at the terminal point on the Colorado River. The capital cost of these tunnel:diversions including facilities to convey the water to Colorado River (exclusive of exchange and storage facilities) is estimated bo be $950,000,000, on a reconnaissance basis, and the annual OM&R $2,300,000 not including cost of pumping energy. The cost of pumping will be offset by power generated. The net power generated is estimated to return an annual revenue of $ 7 , L,OO , 000 . . Exchange water for the areas now served below the points of diversion on the east side southern San Joaquin Valley streams would be conveyed via the west side facilities. A 3,000 c.f.s. incremental increase would be made in the California Aqueduct from the Delta to Hheeler Ridge Pumping Plant. At that location a new canal would be constructed crossing the Kern, Tule, and Kaweah Rivers, and termin- ating at Kings River. A pumping plant with a head of about 50 feet ~ould be required near the Kings River to lift water into the higher elevation Kings River service area canals. The estimated capital cost for these exchange facilities is $260,000,000 (reconnaissance), including the estimated amount required to offset the adverse effect on existing powerplants below the tunnel diversions. The annual OM&R costs are estimated at $1,400,000. Pumping costs are estimated to approximate $6,100,000.