WSP01146

• File Number: 8281.400
• Description: Colorado River Studies and Investigations -- Colorado River Depletion Projections
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/1/1959
• Title: Depletions in Flow of Colorado River at Lee Ferry Due to Man's Activity in Colorado River Basin in Colorado
• Water Supply Pro - Doc Type: Report/Study

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land in the states of the Upper Basin:
State
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Cut-over Forests

Colorado
Wyoming
Utah
New Mexico

1, 556 square miles
86" "
3Z3" II
67" "

The increased runoff due to man cutting the timber has been computed
for the states as follows, using estimated increased :runoff at 150/0 of
tocal runoff:

Colorado

. Area of forests cut-over - I, 556 square mUes
Average elevation estimated at 8,600 feet
total runoff - 489,000 acre feet

This runoff is estimated to be 1150/0 of that prevailing before
man's activities in the Ba..sin, which amounts to an increase of
64. 000 acre feet annually.

New Mexico

Area of forests cut-over - 67 square mUes
. Average elevation estimated at 6. 500 feet
total runoff- 5. 400 acre feet

This runoff is estimated to be 1150/0 of that prevailing before
man's activities in the Basin, which amounts to an increase of.
700 acre feet ~ually.

Wyoming

Area of forests cut-over-86 square mUes
Average elevation estimated at 8. ZOO feet
Total runoff - 14. 500 acre feet

This runoff is estimated to be 1150/. of that prevailing before
man's activities in the Basin. which amounts to an increase
of I, 900 acre feet annually.

Utah
-

Area of forests cut-over - 3Z3 square mUes
Average elev-ation estimated at 8,100 feet
Total runoff - 61, 300 acre feet.

This runoff is estimated to be 1150/0 of that prevaUing before man's
activities in the Basin, which amounts to an increase of 8.00e
acre feet annually. "
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