9603

• UCREFRP Catalog Number: 9603
• Author: Clayton, R. and A. Gilmore.
• Title: Flaming Gorge Environmental Impact Statement Hydrologic Modeling Study Report - Results of Action and No Action Alternative Analysis.
• USFW Year: 2001.
• USFW - Doc Type: \
• Copyright Material: NO

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FIGURE 2 Trace 54 Elevation Com arison

9

6040
c::
0
; 6030
lI:l
>
C1l
iii
C1l
(J 6020
~
:::l
tn
l-
C1l 6010
-;
~
6000

6050

Trace Comparison
Action(ALL)/Action(ALL-1 )/NoAction Trace 54

- Action(ALL)
-Action(ALL-1)
- NoAction

5990
Jan-02 Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11 Jan-12

Date

The 50th percentile ("most probable") elevations over the first 10 years of the model runs
are shown in Figure 3. As compared to the two Action Alternatives, the No Action Alternative
provided significantly higher reservoir elevations in the summer months. The Action (ALL)
results indicated lower elevations than the Action (ALL-I) results. During the winter, elevations
were very similar for all three model runs since the draw down target is the same in all three
rulesets. As in Figure 1, a single trace has been included in Figure 3. This trace (trace 16)
achieved the 50% exceedance level for the Action(ALL) results in July, 10 years into the trace.