1106

• UCREFRP Catalog Number: 1106
• Author: Gosse, J.
• Title: Microhabitat of Rainbow and Cutthroat Trout in the Green River Below Flaming Gorge Dam.
• USFW Year: 1982.
• USFW - Doc Type: Logan, UT.
• Copyright Material: NO

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Recreation Area. It is currently administered by the U.S. Forest
Service (USFS) which maintains day use areas and a riparian trail

between the dam and Little Hole, a distance of 11 km. This area

is utilized by an increasing number of people for purposes of

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camping, river floating, and fishing (USDA 1979 and Larson et

al. 1982). The recreation and scenic resources of the area, cou-

pled with its growing popularity, make it imperative that any fu-

ture changes be considered fully for potential environmental and
social impact.

Study obj ecti ves

The USBR was evaluating a proposed peaking power regime at
the feasibility level for the Flaming Gorge Dam at the beginning
of this study (September 1980). This study was initiated to pro-

vide biological infonnation for evaluating the effects of a peak-

ing power regime on the tailwater fishery. During the winter of

1982 the peaking power proposal was officially delayed until
re~inding and uprating of the existing facilities could be evalu-
ated.

Fish microhabitat

The primary objective of this study was to provide fish mi-

crohabitat data to be utilized in the IFG-4 hydraulic simulation

and fish habitat model (Bovee and Cochnauer 1977, Bovee and Mil-

hous 1978). The purpose of the data was to detennine the impact,

if any, of increased or peaking flow releases on fish microhabi-

tat. Summary tables of the data are presented in an appendix