WSP04694

• File Number: 8281.400
• Description: Colorado River Studies and Investigations -- Colorado River Depletion Projections
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 6/1/1965
• Author: C. Jex Engineers
• Title: Report on Water Runoff and Stream Depletion of the Main Stem Colorado River Basin in Colorado
• Water Supply Pro - Doc Type: Report/Study

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were imported from the White River by the American Gilsonite

Company. Other water used for municipal, domestic and indus-
trial purposes was secured from wells or diverted from subbasin
stream~. Strearr depletion for the above water uses is estirrated

as a single figure regardless of the source of supply.

The total water used for municipal, domestic and
industrial purpose averaged about 16,000 acre feet per year.
Of thi$ amount, it is estimated 7,700 acre feet represents
stream depletion with the balance returned to the Colorado
River downstream. The estirrated annual strearr depletion of

the Grand Valley subbasin is sun,marized in the following
table; ,

Present Stream Depletion - Acre Feet

*Average annual stream depletion by
irrigation
Average annual stream depletion by
municipal and industrial use
, and reservoir evaporation
Total annual stream depletion

207,000

7,700
214,700

*Includes allowance for natural vegetation,
'seeped land and water surfaces without limi-
.tation to man-made depletions.

Potent~al Water Use

Land of the subbasin suitable for irrigation con-

sists of relatively small, somewhat isolated tracts located

above the canals of the valley. The service of this limited

acreage of land can best be accomplished by the construction

of smail pumps using existing canals as source of water

supply. Anticipated irrigation expansion is 7,500 acres.

With this expansion, the subbasin irrigated land would total

39

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