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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(~ Annual Hist~ric Watershed Runoff - Units 1000 Acre Feet
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.-
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Runoff of the Runoff of the X<;ain Sten; in
Year Kain Stene Colo. Colo. River Percent of River
River Basin at Lee Ferrv at Lee Ferrv
1943 2,864 11,260 25.4
1944 2,783 13,220 21.1
1945 3,016 11,540 26.1
1946 2,532 8,744 29.0
1947 3,811 13,510 28.2
1948 3,420 13,690 25.0
1949 3,446 14,360 24.0
1950 2,538 11,060 22.9
195:1 2,743 9,839 27.9
1952 4,222 17,980 23.5
195:3 2,442 8,805 27.7
1954 1,422 6,116 23.2
1955 1,871 7,307 25.6
1956 2,232 8,750 25.5
195'7 4,317 17,340 24.9
1958 3,042 14,260 21.3
1959 2,025 6,756 30.0
1960 2,359 9,192 25.7
18 yr. avo
1943-1960 2,837 11,318 25.0
Gumi. River 1,707 11,318 15.1
Total River 4,544 11,318 40.1

Records of the historic runoff of basin strearr.s show
that oyer 91% of the basin runoff originates on the watersheds
of the three subbasins of ~iddle Park, Eagle River and Roaring
Fork located upstream fron: Glenwood Springs. The watershed
area of' the three subbasins is 61% of the total river basin
watershed area. The annual runoff of each subbasin is given
in the following table. The figure of -152,200 acre feet for
the Grand Valley subbasin is a negative figure showing that
the subbasin stream depletion is greater than the natural run-
off.

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