WSP07975

• File Number: 8278.100
• Description: Title I - Yuma Desalting Plant
• Basin: Colorado Mainstem
• Date: 10/1/1987
• Author: USDOI/BOR
• Title: Yuma Desalting Plant Operations Study - Draft Special Report
• Water Supply Pro - Doc Type: Publication

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.Unacceptable to Mexico.
"If the AAC is lined, this plan become non-viable.

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Plan 6-10.
Category IV

Obtain Water from "Closed Basin" proiect in Colorado.
(No further analysis of this plan is contemplated.)

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This plan would import water for use as substitute water but
would require an extensive conveyance system and pumping
arrangement. It poses significant water rights problems.
Further investigation of this plan revealed that yield from the
project has been committed for use elsewhere in the state of
Colorado and is not available as anticipated.

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plan a-l1. Use Unallocated Storace
Cost $13.9 million, TVS 945 points,

in Fontenelle
Category IV.

Reservoir.

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This plan would use the yield from the unallocated storage in
Fontenelle Reservoir in Wyoming as substitute water for bypassed
drainage water. A yield of 65,000 acre-feet per year was
assumed. This volume would reduce YDP required production to
about 30 Mgal/d. About 15,000 acre-feet of reject stream
replacement water would be required. This plan would involve the
entire Colorado River Basin and could pose potentially
insurmountable institutional problems.

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Advantages:
~Stores unused excess water for later release.
.Total usable water supply in Basin increases.
-Stored water could presumably be released during years without
excess flow.

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Disadvantages:
-Institutional water rights problems of Upper Basin ~. Lower
Basin entitlement.
-This may be only a partial solution.
'The plan may have significant delivery system losses.

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plan B-12.
Cost $105.4

Build Offstream Reservoirs.
million, TVS 618 points, Category V.

Substitute water would be obtained by storing surplus flows in
offstream reservoirs for later release in exchange for bypassed
drainage flows. Analysis of this plan indicated that no new
sites are available that would provide adequate storage capacity
so this plan is not considered technically feasible at this time.
If adequate sites could be found, the average yield would not
exceed 75,000 acre-feet, assuming the pumping capacities were
large enough to pump all of the surplus flows. Smaller pumping
capacities would result in smaller yields.

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