WSP04200

• File Number: 8220.101.09
• Description: Glen Canyon Dam/Lake Powell
• State: AZ
• Basin: Colorado Mainstem
• Date: 11/1/1982
• Author: BOR
• Title: Final Environmental Assessment for Glen Canyon Powerplant Uprating
• Water Supply Pro - Doc Type: EIS

To: Regional Director, Salt Lake City, Utah

2

We concur with your initiation of the following studies:

a. Sediment transport-beach erosion studies below
Glen Canyon Dam through the Grand Canyon.

b, Biological studies to determine what impacts are
occurring based on the above sediment transport studies.

c. Environmental studies of the effects of the present
and historic operation of Glen Canyon Dam on the vegetation,
wildlife, fishery, recreation, and other environmental
resources of the Grand Canyon.

These studies are to be conducted as a cooperative effort with
the National Park Service (NPS), with the Bureau providing the
funding, and being the lead agency. Other appropriate Federal
and non-Federal agencies should also be requested to participate
with the NPS and the Bureau in the above studies. We will
need the assistance of the Fish and Wildlife Service in certain
of these studies and a copy of this letter is being sent to the
Director of the Fish and Wildlife Service to alert that agency
of our decision and the need for its assistance.

3. In conjunction with these studies, you should undertake an
analysis of potential alternative operating criteria, consistent
with CRSP requirements, to see if there are feasible alternatives
to our present operating criteria that will address the many
concerns raised on our uprating environmental assessment. Should
alternatives that meet the above criteria be identified, an
environmental impact statement should be prepared, This would
lead to a decision process to determine appropriate long-term
operating criteria for Glen Canyon Powerplant.

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