WSP01124

• File Number: 8220.104.I
• Description: Flaming Gorge
• State: UT
• Basin: Yampa/White/Green
• Date: 11/25/1992
• Author: USDOI-USFWS
• Title: Final Biological Opinion on the Operation of Flaming Gorge Dam - ‎(Part 2 of 2)‎
• Water Supply Pro - Doc Type: Biological Opinion

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data is needed to refine flow recommendations, particularly during the
winter and spring. In addition, studies to date have not specifically
addressed interactions between non-native and native fish species and
the potential effec~s of dam operations on non-native fishes.

III. STUDY GOALS. OBJECTIVES AND END PRODUCT:

GOAL: Determine the biological and physical responses of the
Green River ecosystem to seasonal flow recommendations
for Flaming Gorge Dam.

Objective 1: Track the reproductive success of endangered fish and
other species in the Green and Yampa Rivers, and
determine the relationship between flow and spawning
success of endangered fish and other fish species
downstream of Flaming Gorge Dam.

Objective 2: Evaluate recruitment of endangered fish from age 0 to
subsequent life history stages and determine the
relationship between seasonal flows and survival of young
fish.

Objective 3: Monitor the relative abundance and population structure
of endangered and other selected co-occurring fish
species to acquire information on interactions between
species and how flows may differentially affect species.

BHD PRODUCT. Refined, biologically-based seasonally flow
recommendations for Flaming Gorge Dam that would benefit
endangered and native fish species.

IV. Study Area:

The study area is shown in Figure 1 of the attached Flaming Gorge Five
Year Research Plan. It includes portions of the Yampa, Green, and
Colorado rivers. Specific river segments encompass the Yampa River in
Dinosaur National Monument, the entire Green River downstream of Flaming
Gorge Dam and the Colorado River from its confluence with the Green
River downstream to the Lake Powell inflow area.

V. Studv Methods/AQDroach:
See Section 3.3 of attachment (Flaming Gorge Five Year Research Program)

VI. Task Description FY -1993:

Twelve studies are proposed in the 1993 Scope-of-Work as part of the
Flaming Gorge Five Year Research Plan (Research Plan). Studies one
through six are part of the Core-Research studies, tasks six through
eleven are Hypotheses-Testing studies. Study 12 falls under Habitat-
Management/Evaluation Studies. Section 4.0 of the attached study plan
summarizes work which is proposed for FY 1993. Detailed Scopes-of-Work

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