WSP05120

• File Number: 8200.760
• Description: Yampa River General
• State: CO
• Basin: Yampa/White
• Water Division: 6
• Date: 1/1/1983
• Author: USGS
• Title: Reservoir Development Impacts on Surface-Water Quantity and Quality in the Yampa River Basin - Colorado and Wyoming - 1983
• Water Supply Pro - Doc Type: Report/Study

001

In many instances, desired amounts for transmountain diversions historically
would not be avallable--especially for the Vidler transmountain diversion, where
only a fraction or none of the water desired would be available. Some of the
potential diversion shortages are summarized in table 9. A shortage is defined as
any model-computed value being less than the desired diversion requirement. These
shortages are based on the diversion schedules shown In table 5. Most shortages
associated with the Vidler transmountain diversion could occur with reservolr-
development options 2, 3, and 4 (table 3), where shortages could occur during 417
to 460 of 600 months or 70 to 77 percent of the time (table 9). Options 2, 3, and
4 Include the large Oak Creek Power and Water complex with 'significant diversions
of water from the upper Yampa River basin Into the Trout Creek subbasin. This
diverted water, therefore, might not be available for the downstream Vidler trans-
mountain diversion. Shortages associated with the Hog Park transmountain diversion
could be the same for all reservoir-development options. Shortages could occur
during 39 of 200 months or about 20 percent of the time (table 9).

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Table 9.--Summary of monthly shortages that could result
from, proposed transmountain diversions

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Model
opt I on

Number of
months
shortage
coul d
OCCur

Percentage
of months
shortage
could
occu r

Maximum monthly shortage

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Historical condltions-- 92
1--~--------------- 252
2------------------ 460
3------------------ 417
4------------------ 454

15
42
77
70
76

344
358
376
391
391

20.8
21.6
22.7
23.6
23.6

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(cubic feet (thousands of
per second) acre-feet)

Vidler transmountaln diversion (12-month diversion schedule)--control point 39
(Yampa River at Steamboat Springs, Colo,)

Hog Park tranSmountain diversion (4-month diversion schedule)-'-control point 46
(Little Snake River near Slater, Wyo.)

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His to rica I condltions-- 39 20 124 7.49
1------------------ 39 20 124 7.49
2------------------ 39 20 124 7.49
3------------------ 39 20 124 7.49
4------------------ 39 20 124 7.49

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36