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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During the lS year period, the natural undepleted
subbasin water supply averaged 1,544,400 acre feet. The ex-
port of subbasin runoff was expanded fron, an average of 60,000
acre feet per year for the first five years of the study
period to an average of 367,000 per year for the last five
years Of the study period. The average subbasin runoff and
the status of water use under historic conditions and a con-

dition reflecting the water export capability of trans~ount-

ain water diversion facilities as operative for the year 1960

is surr~arized in the following table;

.Undepleted Liddle Park Subbasin.Runoff
Average for 18 Year ~eriod 1943-1960
Units 1000 Acre Feet

Historic Export Capability
Conditions Operation

River Runoff at Glem'ood Springs
Inbas:i:h,'Streal, Depletion
Export'~d ,.Jater (Eastem Colo .,)
Irr,po:r;t'ed '.Jater (Yarpa River)
Exported (Roaring Fork Subbasin)

1,263.5
74.$
206.3
- 2.7
2.5

1,1)6.1
74.8
333.7
- 2.7
2.5
1,544.4

Net Undepleted Subbasin:rater Supply

1,544.4

Under historic flow conditibns, the five headwater
strea~s of the subbasin (source of supply for export diversions)
consisting of the Colorado River above Granby, Willow Creek,
Fraser River, Williams Fork River and Blue River contributed
670,100 acre feet or 53.0% of the subbasin runoff. The his-

toric annual runoff of the five streams at or near the junc-

tions with the Colorado River is given in the following

table;

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