7423

• UCREFRP Catalog Number: 7423
• Author: U.S. Bureau of Reclamation.
• Title: Glen Canyon Environmental Studies Draft Report, September 1987.
• USFW Year: 1987.
• USFW - Doc Type: Washington, D.C.
• Copyright Material: NO

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SECTION III: SETTING AND RESOURCES STUDIED

Below Glen Canyon Dam, the Colorado River passes
through the Glen Canyon National Recreation Area (Glen
Canyon). In this lS-mile reach of river between Glen
Canyon Dam and Lees Ferry can be found one of the
finest trout fisheries in the western united states.
Below Lees Ferry, the river enters Grand Canyon
National Park (Grand Canyon), with its world-famous
scenery and white-water rapids (see location maps in
Figures I-1 and I-2).

Study Targeted critical Resources

Agencies and individuals involved in the GCES, working
together, identified and selected for study the down-
stream resources that were both important to the
agencies and the public and likely to be affected by
dam operations. These are termed the "critical re-
sources." Although analyzed independently in the
studies, related critical resources have sometimes been
grouped here for ease of discussion.

The Critical Resources Are The Humpback Chub,
Common Native Fish, Rainbow Trout, camping Beaches,
Riparian vegetation And wildlife, White-Water
Boating, And Trout Fishing

HumDback chub. Humpback chub use the warm, highly sa-
line waters of the Little Colorado River to spawn and
rear larval young (Figure III-1). This is the only
breeding population of humpback chub in the Colorado
River Basin below Glen Canyon Dam. Chub are afforded
legal protection through the Endangered Species Act,
which assures that no federal action can be taken
which would affect critical habitat of the species or
jeopardize its continued existence. Further, all
federal agencies are directed to use their authorities
to help recover the species (exceptions to this are
possible under the law, but have never been granted) .

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