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Last modified
1/26/2010 12:49:26 PM
Creation date
10/11/2006 11:37:38 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8220.101.09
Description
Glen Canyon Dam/Lake Powell
State
AZ
Basin
Colorado Mainstem
Date
2/16/1996
Title
Biological Opinion Summary
Water Supply Pro - Doc Type
Biological Opinion
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<br />-'-:" <br />'..1 <br />-~;,;. <br /> <br />"':8'. <br />"frU <br /> <br />the test flow revealed that incidental take for the Kanab arnbersnail determined in the January <br />1995 biological opinion would be exceeded. <br /> <br />A 1978 biological opinion found that past. present. and future operations of Glen Canyon Darn <br />jeopardized the continued existence of the humpback chub and limited recovery of the humpback <br />chub and Colorado squawfish (Ptychocheilus lucius)(U.S. Fish and Wildlife Service 1978). <br />Consultation accompanying the Glen Canyon Environmental Studies (GeES) program (Phase I) <br />resulted in a draft jeopardy opinion in 1987 (2-21-87-23). The, second phase of GeES began <br />in 1988, and the Secretary of the Interior announced preparation of an EIS in July 1989. In <br />September 1991, the Service agreed with Reclamation that a separate consultation would not be <br />necessary for interim flows because consultation was continuing on operation of the darn and <br />interim flows were designed to reduce impacts from the existing condition while the EIS was <br />being prepared. With guidance from the cooperating agencies, Reclamation selected Modified <br />Low Fluctuating Flow (MLFF) as the preferred alternative in January 1993. Common elements <br />for FEIS alternatives included beach/habitat building flows and adaptive management. The <br />January 1995 biological opinion identified a reasonable and prudent alternative with four <br />elements for endangered fish and reasonable and prudent alternative for Kanab ambersnail. The <br />Service agreed to a program of experimental flows that would include high steady flows in the. <br />spring, and specifically stated that "Studies of high steady flows in the spring may include' <br />studies of habitat building and' habitat maintenance flows." <br /> <br />Because of the length of this biological opinion, we have included the following table of <br />contents : <br /> <br />Biological and Conference Opinions Glen Canyon BeachlHabita(,Building Rows 2!l6/96 <br /> <br />3 <br />
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