6006

• UCREFRP Catalog Number: 6006
• Author: Holden, P. B. and L. W. Crist.
• Title: Documentation of Changes in the Macroinvertebrate and Fish Populations in the Green River Due to Inlet Modification of Flaming Gorge Dam
• USFW Year: 1981.
• USFW - Doc Type: Final Report.
• Copyright Material: NO

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waterfowl management area. These two streams, along with a dry
wash, provide backwaters during high flows. The station is 1.5
mil es long.
Lower Yampa
This station is located 1-2 miles above the mouth of the Yampa
River. Substrate is primarily cobble (75%) with small areas of
sand (25%). The area has riffles, runs, pools, and a few back-
waters at low and medium flows. At high flows, most of the
area becomes a swift run. The station is 1.2 miles long.
Lily Park
The Lily Park station starts at the mouth of Cross Mountain
Gorge and extends downstream for about a mil e. The area has
almost totally a cobble substrate, and long riffles and runs
predominate. Backwaters are scarce, especially during high
flows.
A station in Split Mountain was sampled in 1978, but was dropped in
1979 and 1980 because it added little new information over surrounding
stations.

METHODS

General
Three full years of seasonal field collections were made, 1978,
1979, and 1980. Sampling the first year was intended to determine pre-
modification conditions; unfortunately, the study was not initiated
early enough to obtain a full year's field data. Therefore,"before"