9602 ‎(2)‎

• UCREFRP Catalog Number: 9602
• Author: Clayton, R. and A. Gilmore.
• Title: Flaming Gorge Draft Environmental Impact Statement Hydrologic Modeling Report.
• USFW Year: 2002.
• USFW - Doc Type: \
• Copyright Material: NO

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"J
Flow Durations (May -July)
Reach 1
X3000
- No Action 4 Week Plo~~
12000 Historic d week Plow (71 -91 )
- Action 4 week Flow
10000
8000
tlOOO
~OOO
2000
(t -___ - -_ - _ _-..- --_ _- ___ __..___ __
(1% _ .. ~O~y~, ~(l9r 60<<. 509 I (3l)`~~
Percent Exceeded
Flaming Gorge Annual Bypass Release Results
Water released through the bypass tubes and the spillway (bypasses) can have a direct
impact on the amount of power produced at Flaming Gorge Dam. For the purpose of comparing
the Action and No Action alternatives in terms of impact to power production, the distributions of
annual bypass volumes are shown in Figure 14. The figure shows the percentage of occurrences
associated with the total volume bypassed each year. The model results indicate that the Action
alternative will likely have about a 1 in 2 chance of requiring a bypass (about 50% of the time) in
any given year while the No Action alternative will likely have about a 1 in 5 chance of requiring a
bypass (about 22% of the time) in any given year. These frequencies have not changed much
from those reported in the October report, however the magnitude (volume} of these bypasses has
diminished substantially.
Figure 14 Annual Bypass Volume Distribution