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CRBSCP - Desalting Complex Unit - Title I
Yuma Desalting Complex Unit (CRBSCP) | Project History | Project Data | Contact Information

Project Data
Land Areas (1992)
Area Irrigated and Crop Value


Project # (enter number)

Land Areas (1992)

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Area Irrigated and Crop Value

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Project Water Supply
Project Water Quality


Project Water Supply

Current Conditions

Historic Conditions

Annual Precipitation
Normal3.17 in
Maximum - 19896.75 in
Minimum - 19661.01 in
Yuma, Arizona 1961-1990

Mean Annual74.4 ?F
Daily Maximum - 07/28/1995124 ?F
Daily Minimum - 02/`18/19955 ?F
Yuma, Arizona 1948-1996

Welton-Mohawk Irrigation District
Drainage water108,000 acre-ft

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Project Water Quality

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Facilities in Operation
Desalting Facilities
Storage Facilities
Carriage Facilities
Pumping Plants


Facilities in Operation
Yuma Desalting Plant1
Bypass drain53 mi
MODE siphon0.65 mi

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Desalting Facilities
Yuma Desalting Plant
LocationLocated about 4 miles west of Yuma, Arizona, near the Arizona Public Service Co.`s Yucca Powerplant.
Year Completed1978-(Under construction)
Capacity113 cfs
Welton-Mohawk drainage influent97,300 acre-ft
Plant product water effluent68,500 acre-ft
Reject steam and bypass28,800 acre-ft
Salinity concentration:
Welton-Mohawk drainage influent2,900 ppm
Product water295 ppm
Reject stream9,400 ppm
Return flow to the Colorado River
Blended water78,600 acre-ft
Product water68,500 acre-ft
MODE water10,100 acre-ft

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Storage Facilities

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Carriage Facilities
Bypass Drain
LocationThe bypass drain extends from the terminus of the existing MODE at Morelos Dam in Arizona to the upper end of the Santa Clara Slough, about 30 miles north of the Gulf of California, in Mexico.
Construction period1975-1977
Total length53 mi
Length in the US16 mi
Length in Mexico37 mi
Maximum capacity353 cfs
Reject stream capacity62.3 cfs
Emergency MODE capacity290.7 cfs
Typical section in the US, concrete lined:
Bottom width12 ft
Side slopes1.5:1
Lining thickness:3 in
Water depth, weighted average6.8 ft
Typical section in Mexico, concrete lined:
Bottom width10.17 ft
Side slopes2:1
Water depth5.09 ft
Lining thickness3.94 in
Freeboard1.64 ft

Main Outlet Drain Extension Siphon
LocationAdjacent to the base of Prison Hill, extends under the railroad bridge and U.S. Highway 80 Alternate bridge, continues downstream along the south bank of the Colorado River.
Construction period1975-1976
Description:Reinforced concrete pressure pipe with monolithic concrete transitions
Length0.65 mi
Diameter10 ft
Capacity353 cfs

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Pumping Plants

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Last updated: Oct 02, 2009