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WSP11877
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Last modified
1/26/2010 3:19:10 PM
Creation date
10/12/2006 5:15:09 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8220.101.10
Description
Colorado River-Water Projects-Glen Canyon Dam/Lake Powel-Glen Canyon Adaptive Management
Basin
Colorado Mainstem
Water Division
5
Date
9/1/2002
Author
DOI-BOR-NPS-USGS
Title
Proposed Experimental Releases from Glen Canyon Dam and Removal of Non-Native Fish-Environmental Assessment
Water Supply Pro - Doc Type
Report/Study
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<br /> Proposed Action <br /> No Action <br />Resource Alternative , <br /> Experimental Dam Releases Mechanical <br /> Removal <br /> 8,000 cfs 6,500-9,000 cfs 5,000-20,000 31.000- 42,000-45,000 <br /> steady flow fluctuating flow cfs fluctuating 33,000 cfs cfs high flow <br /> flow high flow <br /> effect on - trap beaver in <br /> livestock river bank dens <br />Wildlife: Fluctuations Favorable due Those on bars Rapid rise in Flooding of Rapid rise in No effect <br />Herpetofaun of 3-4+ Wday to increase in or shorelines flows could nests, eggs, flows could <br />a and high food supply, overcome if take individuals and young result in take of <br /> flows take enhanced water rises 3+ on cobble & could occur individuals on <br /> individuals on cover Wday; no effect alluvial bars & through cobble & <br /> bars & along to nesting along the August alluvial bars & <br /> shoreline: during fall shoreline along the <br /> rising water shoreline <br /> April-July <br /> inundates <br /> nests. dens <br /> and <br /> hibemacula <br /> along shores <br /> riparian <br /> zones <br />Cultural Previously No historic No historic No historic No historic No historic No historic <br />Resources; mitigaled properties properties properties properties properties properties <br />Historic affected affected affected affected affected affected <br />Properties <br />Cultural On-going No effect No effect Minor adverse Adverse Adverse effect Adverse <br />Resources & consultation effect on tribal effect on on tribal effect to <br />Indian cultural tribal cultural cultural tribal <br />Sacred Sites resources resources resources cultural <br /> (marshes, resources <br /> herptofauna) and sacred <br /> sites, but <br /> seek <br /> means for <br /> beneficial <br /> use of <br /> removed <br /> trout <br />Hvdropower Proiected Increase in fall Increase in fait Increase in on- Minor Bvoass of No effect <br /> <br />w <br />0) <br /> <br />() <br />:r <br />III <br />-0 <br />a; <br />, <br />w <br />Co <br />)> <br />al' <br />(") <br />a; <br />a. <br />m <br />:J <br />< <br />=;. <br />o <br />:J <br />3 <br />CD <br />a <br />III <br />:J <br />a. <br />m <br />:J <br />< <br />=;. <br />o <br />:J <br />3 <br />CD <br />:J <br />~ <br /> <br />() <br />o . <br />:J <br />00 <br />CD <br />.0 <br />C <br />CD <br />:J <br />(") <br />CD <br />00 <br />
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