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Last modified
1/26/2010 12:13:35 PM
Creation date
10/11/2006 9:37:32 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8220.101.09
Description
Glen Canyon Dam/Lake Powell
State
AZ
Basin
Colorado Mainstem
Date
3/23/1998
Author
USDOI-BOR
Title
Biological Assessment of a Beach/Habitat Building Flow from Glen Canyon Dam in 1998
Water Supply Pro - Doc Type
Biological Opinion
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<br />. <br /> <br />. <br /> <br />SUMMARY TABLE OF IMPACTS <br /> <br />ANTICIPATED IMPACTS-199B BEACH/HABITAT BUILDING FLOW <br />Species May June July <br />Kanab Loss of between Loss of between Loss of between <br />ambersnail 10.27% to 14% of 10.27% to 14% of 10.27% to 14% <br /> occupied habitat and occupied habitat of occupied <br /> 8.4% of total and 8.4% of total habitat and 8.4% <br /> population population of tota I <br /> population <br />Humpback Adultl Young-of- Adultl Young-of- Adultl Young-of- <br />chub Sub-adult Year Sub-adult Year Sub- Year <br /> adult <br /> No effect May displace No effect May No May <br /> downstream displace effect displace <br /> downstream downstream <br />Razorback Not enough fish to Not enough fish to Not enough fish <br />sucker study or monitor study or monitor to study or <br /> monitor <br />Bald eagle Not likely to be Not likely to be Not likely to be <br /> present present present <br />Peregrine No adverse effect No adverse effect No adverse <br />falcon effect <br />Southwestern Loss of backwater Loss of backwater Loss of <br />willow wetland habitat and wetland habitat and backwater <br />flycatcher non-essential forage non-essential forage wetland habitat <br /> species; No effect on species; No effect and non- <br /> nesting activity or on nesting activity or essential forage <br /> nest trees. nest trees. species; No <br /> effect on nesting <br /> activity or nest <br /> trees. <br /> <br />1998 GCD Beach/Habitat Building Flow 23 <br /> <br />Biological Assessment <br />
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