WSP10956

• File Number: 8210.470
• Description: Pacific Southwest Interagency Committee
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 8/1/1963
• Author: PSIAC
• Title: Pacific Southwest Water Plan - Appendix - August 1963
• Water Supply Pro - Doc Type: Report/Study

Alternative Route Summary--Seven alternative reconnaissance plans for
conveyance of an additional annual supply of 1,200,000 acre-feet of
water to southern California are presented in this.section. A
tabular summary comparing these plans follows.

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In brief, these alternative plans all rely on conserving the
additional 1,200,000 acre-feet of water in two proposed reservoirs
on the Trinity River system with diversion to Sacramento River. As
indicated in the discussion of the alternative plans, these proposed
reservoir storage systems on Trinity River and appurtenant diversions
should be authorized for construction and operation by the Bureau of
Reclamation.

The additional water supply is considered to be conveyed to
southern California through the following alternative routes:

(a) Enlargement of California Aqueduct along west side of
San Joaquin Valley through Tehachapi pumping plants and
tunnels, and thence to Perris Reservoir (Alternative
Plans 2 and 3).

(b) Enlargement of East Side Division on easterly side of
San Joaquin Valley; thence connecting with California
Aqueduct immediately north of Tehachapi Mountains, from
which location the California Aqueduct would be enlarged
to its terminus at Perris Reservoir (Alternative Plan 1).

(c) Sierra Nevada tunnel diversions of east side San Joaquin
Valley streams to connect with California Aqueduct squth
of Tehachapi Mountains, and thence through an enlarged
aqueduct to Perris Reservoir. Exchange water for down-
stream users of east side San Joaquin Valley streams
conveyed either through enlarged California Aqueduct
system to south end of San Joaquin Valley, and by 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 north-
erly 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 No. 2 represents the minimum basic facilities
required to convey the additional water to southern California. No

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