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WSP02186
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Last modified
1/26/2010 12:35:02 PM
Creation date
10/11/2006 10:57:25 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8220.101.09
Description
Glen Canyon Dam/Lake Powell
State
AZ
Basin
Colorado Mainstem
Date
11/1/1995
Author
USDOI-BOR
Title
Biological Assesment of a One Time Test of Beach/Habitat-Building Flow from Glen Canyon Dam-Spring 1996
Water Supply Pro - Doc Type
Biological Opinion
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<br />i~ <br />~' <br /> <br /><';", <br />'<';;~~,,~ <br /> <br />-I <br /> <br />Rational for Conducting the Test Flow in a March/April Time Frame <br /> <br />The timing of the test flow was considered in detail. Specifically, the time <br />frame for the test flow was selected to reduce impacts on river resources, by <br />conducting the test flow: 1) prior to native fish (especially humpback chub) <br />spawning, or larval dispersal; 2) after the peak of rainbow trout spawning at <br />Lees Ferry; 3) several weeks after the peak concentrations of wintering bald <br />eagle and waterfowl 4) prior to the Neotropical bird and waterfowl breeding <br />seasons; S) during a month in which high flows occurred in the pre-dam era; 6) <br />prior to the peak release of non-native saltcedar (Tamarix ramosissima) seeds <br />in late April and May, to allow riparian soils time to desiccate after the <br />test flow, thereby reducing saltcedar germination; and 7) prior to the <br />recreational river rafting season. <br /> <br />restored <br /> <br />3' <br />
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