7801

• UCREFRP Catalog Number: 7801
• Author: Valdez, R. A.
• Title: Synthesis of Winter Investigations of Endangered Fish in the Green River Below Flaming Gorge Dam.
• USFW Year: 1995.
• USFW - Doc Type: \
• Copyright Material: NO

~:
List of Tables
Table 1. Status of native fishes in the Green River below Flaming Gorge
Dam . ....................................................
Table 2. Ice conditions on the Green River and Yampa River for December
through March, 1986-87 (Winter 1} and 1987-88 (Winter 2)........... .
Table 3. Winter movement (average net movement in kilometers} by
radiotagged adult Colorado squawfish and razorback suckers in the
Green River and Yampa River (from Valdez and Masslich 1989, Wick
and Hawkins 1989) . .........................................
Table 4. Depth (meters) and velocity (meters/sec) of winter habitat used by
radiotagged adult Colorado squawfish in the Green River and Yampa
River (from Valdez and Masslich 1989 Wick and Hawkins 1989)
... 11
... 21
Table 5. Predicted stage change, susceptible ice thickness and days to reach
resistant thickness for three sites on the Green River ................... .
28
47
List of Figures
Figure 1. Areas of winter habitat studies in the Green River and Yampa
River ........................................................ 2
Figure 2. Mean, maximum, and minimum monthly flows of the Green River
near Greendale, Utah (0.5 miles below Flaming Gorge Dam) for
water years 1987 and 1988 ........................................ 5
Figure 3. Flow of the Green River near Jensen, Utah for the 2 years preceding
Flaming Gorge Dam and for the 2 years of this study. (from Valdez
and Masslich 1989) . ............................................ 6
Figure 4. Monthly flow exceedance curves for the Green River for 12 year
periods before and after Flaming Gorge Dam. Average monthly flows
from USGS records at Greendale, Utah. (from Valdez and Masslich
1989) ........................................................ 8
Figure 5. Representative average and extreme hourly releases from Flaming
Gorge Dam for January and February of 1987 and 1988, as recorded
by WAPA . ................................................... 9
Figure 6. Changes in stage of the Green River at three locations downstream
from Flaming Gorge Dam, under four time-release scenarios, 1, 2, 4,
and 8 hours at 4200 cfs following a low flow of 800 cfs. (from Valdez
and Masslich 1989), for 10 hour (Smith and Green 1990). Stage
change and pre-dam flows predicted for SSARR model . ................. 10
Figure 7. Daily water temperature of the Green River for Winter 1 (1986-87)
and Winter 2 (1987-88), as recorded at the USGS stream gage near
Jensen, Utah. Values are instantaneous measurements taken once
daily by an observer, (from Valdez and Masslich 1989) ................... 12
Figure 8. Gradient of the Green River from Flaming Gorge Dam to Ouray,
Utah with associated ice formation during January and February, 1988.
(from Valdez and Masslich 1989) ................................... 14
v