8128

• UCREFRP Catalog Number: 8128
• Author: U.S. Bureau of Reclamation.
• Title: Operation of Glen Canyon Dam\
• USFW Year: 1995.
• Copyright Material: NO

Purpose of and Need for Action
Interim Operations
To protect downstream resources until completion of this EIS and the
record of decision (ROD), Reclamation began testing interim operations on
August 1, 1991. The interim operating criteria and a monitoring program
were implemented on November 1, 1991. Although the criteria may be
modified based on new information, they will remain in effect until the EIS
and ROD are completed. These interim criteria are essentially the same as
those described later under the Interim Low Fluctuating Flow Alternative.
The interim operating criteria:
• Restrict peak releases to 20,000 cfs
• Limit minimum releases to 5,000 cfs at night and 8,000 cfs during the
day
• Limit daily fluctuations to between 5,000 and 8,000 cfs, depending on
the monthly release volume
• Limit the rate of change to 2,500 cfs per hour (cfs/hr) during periods of
increasing releases and 1,500 cfs/hr during periods of decreasing
releases
Cooperating Agencies
The Secretary designated Reclamation as lead agency in preparing the EIS.
Cooperating agencies are: Bureau of Indian Affairs (BIA), National Park
Service (NPS), U.S. Fish and Wildlife Service (FWS), Western Area Power
Administration (Western), Arizona Game and Fish Department (AGFD),
Hopi Tribe, Hualapai Tribe, Navajo Nation, San Juan Southern Paiute
Tribe, Southern Paiute Consortium, and Zuni Pueblo.
Representatives from Reclamation, NPS, FWS, Western, U.S. Geological
Survey, AGFD, Hopi and Hualapai Tribes, Navajo Nation, and a private
consulting firm served on the interdisciplinary EIS team charged with
formulating the alternatives and assessing their impacts on the human
environment.
Cooperating
Agencies
GCES EIS
Team
Glen Canyon Dam EIS Summary
3