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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by the basic CRSP requirements to deliver 8.23 million
acre-feet (maf) of water annually, maintain minimum
flows of 1,,000 cfs in winter and 3,000 cfs in summer,
and stay within the designated powerplant capacity of
31,500 cfs. These modified schemes are illustrations
of flow patterns that could protect resources during
the periods of the year when they are sensitive to
flows. It should be recognized that changes to
operations to protect or benefit downstream resources
might have negative consequences for other CRSP
functions. In evaluating possible modifications to
operations, these studies have assessed only benefits
and costs to the environment and recreation. As-
sessment of the implications for power generation,
revenue, water delivery, or other system and legal
requirements was not within the scope of the GCES.
These studies, therefore, were not intended nor
designed to lead directly to changes in dam operations
but to provide the technical information necessary to
enable decision makers to assess the significance of
impacts.

studies Provide Basis For secretarial Decision

This report has been reviewed for technical accuracy by
the participating agencies. In addition, a review com-
mittee composed of representatives from these agencies
will meet to consider policy implications of the
studies. The report is also being reviewed by a
committee of the National Research Council of the Na-
tional Academy of Sciences. The participating
agencies, the agency review committee, and the Na-
tional Academy of Sciences GCES Review Committee will
separately make recommendations concerning the
technical adequacy of the report and future courses of
action that should be taken.

In addition, the Fish and wildlife Service is reviewing
the GCES data on the humpback chub to develop a new
biological opinion for the protection or recovery of
the species.

Although the range of decisions that might ultimately
be made by the Secretary of the Interior in response to
the GCES has not yet been determined, several outcomes
are possible, including:

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