Pacific Southwest Water Plan - Report August 1963

Document: Pacific Southwest Water Plan "Printed Copy" Chapter VI, August 26 ,1963 page 10c. Sierra Nevada tunnel diversions of east side San Joaquin Valley streams to connect with California Aqueduct south of Tehachapi Mountains and thence through enlarged aqueduct to Perris Reservoir. Exchange water for downstream users of east side San Joaquin Valley streams conveyed either through enlarged California Aqueduct to the south end of San Joaquin Valley, and by a new canal extending northerly to intersect east side streams (Alternative Plan 4), or through an enlarged East Side Division to Kern River (Alternative Plan 6). d. Sierra Nevada tunnel diversions of east side San Joaquin Valley streams to the southerly side of Tehachapi Mountains and thence to Lake Havasu on Colorado River. Exchange water for downstream users of east side San Joaquin Valley streams conveyed either through enlarged California Aqueduct system and new canal extending northerly from south end of San Joaquin Valley to intersect east side streams (Alternative Plan 5), or through an enlarged East Side Division to Kern River (Alternative Plan 7). Alternative Plan 2 represents the minimum basic facilities required to convey the additional water to southern California. No recognition is given under that plan to the existing and increasing needs for additional water within Central Valley areas. While the cost involved in providing such service to other areas in California is not included, the facilities could be constructed in a manner to serve these areas if this were determined, in consultation with the State, to be desirable. Associated with the other alternative plans, therefore, are prospective Central Valley Project facilities which, under each particular alternative plan considered, would need to be authorized concurrently with the specific features proposed for conveying additional water to southern California. These prospective Central Valley Project features relate to East Side Division and Delta Water Quality Improvement. Prospective East Side Division facilities vary among the several alternative plans in order to accomplish some measure of East Side Division service appropriately and expeditiously. Use of any alternative plan other than Plan 2, consequently, would result in related multiple-purpose benefits occurring within the Central Valley Basin. Accomplishment of any alternative plan comprising the Sierra tunnel diversions could be realized only after negotiations, probably extensive, with downstream water users. This report plan contemplates that conveyance of this initial 1,200,000 acre-feet unit would be through an incremental enlargement of the California Aqueduct. This method is reflected in alternative Plans 2 and 3. Specific associated additional facilities for the Central Valley Project would need to be included for concurrent authorization as part of that project. VI-10Epson Perfection 4870 Photo, 400 dpi, 8 bit, 1,292,760 byte