WSP08031

• File Number: 8278.100
• Description: Title 1 - Yuma Desalter
• Basin: Colorado Mainstem
• Date: 4/1/1977
• Author: USDOI/BOR
• Title: Colorado River Basin Salinity Control Project - Title I Division - Desalting Complex Unit, Arizona - Status Report
• Water Supply Pro - Doc Type: Publication

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ANNUAL EQUIVALENT COST:
(50-Year Period of Analysis at 5-5/8 Percent)

Annual Equivalent of Investment
Annual Costs (O.M.R.&E.)

515,214,000
11,745,000

Total Annual Cost

$ 26,959,000

IMPLEMENTATION PERIOD:

Irri9ation Efficiency Improvement Measures
Desalting Complex Unit Construction
Yuma Desalting Plant Construction

7 yea rs
6 yea rs
4 years

FEDERAL BENEFITS:

Economic benefits have not been determined. Social and
political benefits accrue that are outside the normal
realm of economic quantification; however, in addition to
meeting the salinity provisions_of Minute No. 242, the
project will reclaim about 123,700 acre-feet of water per
year that is presently being bypassed and, therefore, lost
for further use.

BENEFIT-COST RATIO:

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Not computed.

ALLOCATION OF COSTS:

All costs are allocated to Mexican Treaty.

REPAYMENT:

Project expenditures are nonreimbursable.

HYDROLOGY:

The 21-mile long Gila Gravity Main Canal, with headworks at
Imperial Dam, suppl ies water to the Gila Project in accord-
ance with the Gila Project Reauthorization Act of 1947
(61 Stat. 628). Approximately 15 miles southeast of
Imperial Dam the Wellton-Mohawk Canal diverts from the
Gila Gravity Main Canal. The Wellton-Mohawk Canal and its
branches convey irrigation water to the Wellton-Mohawk
Division, Gila Project. Three pumping plants along the
canal lift water a total of 170 feet. Smaller relift pumps
are located throughout the Division on 227 miles of
laterals.

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Irrigation return flows are selectively pumped from 106
drainage wells located throughout the Division. All drain-
age is discharged to the WMMCC, which runs westerly the

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