9579

• UCREFRP Catalog Number: 9579
• Author: U.S. Bureau of Reclamation.
• Title: Summary of the Final Environmental Impact Statement - Navajo Reservoir Operations.
• USFW Year: 2006.
• USFW - Doc Type: Grand Junction - Durango, CO.
• Copyright Material: NO

Executive Summary
FEIS - Navajo Reservoir Operations
EIS Evaluation Process
The EIS evaluated seven alternatives. Most of the alternatives formulated for evaluation
are described in terms of flow rates representing minimum and maximum limits in the
range of release rates (cfs) for Navajo Dam. For example, the 250/5000 Alternative has
a minimum release of 250 cfs and a maximum release of 5,000 cfs. The alternatives
formulated are shown in table S-1, and the alternatives formulation/ evaluation process
is depicted in figure S-3.
Table S-1.-List of Navajo Reservoir operations
EIS alternatives
Title
No Action Alternative (Historical Operation) (1973 - 91)
250/5000 Alternative
500/5000 Alternative
250 Variable/5000 Alternative
250/6000 Alternative
500/6000 Alternative
Decommission/Breach Navajo Dam Alternative
The range of alternatives developed was formulated and subsequently evaluated using
hydrologic modeling and each alternative's ability to:
? Maintain authorized purposes of the Navajo Unit
? Meet the goals of the SJRBRIP
? Meet the Flow Recommendations for the San Juan River (Flow Recommendations)
(Holden, 1999)
? Reflect public scoping meetings and informal public contacts
? Reflect coordination with cooperating agencies and interagency consultations