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WSP01990
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Last modified
1/26/2010 12:33:47 PM
Creation date
10/11/2006 10:47:34 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8220.101.19
Description
Glen Canyon Dam/Lake Powell
State
AZ
Basin
Colorado Mainstem
Date
12/1/1996
Title
Information Publicly Available from the Bureau of Reclamation - Upper Colorado Regional Office - Proposals by Groups to Drain Lake Powell - Data on Impacts and Techinical Information
Water Supply Pro - Doc Type
Report/Study
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<br />completely emptying Lake Powell, since there would be no storage that could <br />be released during drought periods, only temporary storage during the <br />runoff season which would then be evacuated when innows dropped. Under <br />the assumption that elevation 3500 would be viewed as a type of minimum pool, <br />annual releases to the lower basin would be about the same as the full evacuation <br />alternative, Evaporation at Lake Powell would be reduced from current levels by <br />aboul two-thirds. but evaporation at Lake Mead would increase slightly due to a <br />higher long-term lake level. Ifsome drawdown below elevation 3500 feet were <br />permitted to control high runoff years. this would eliminate months of power <br />generation capability but would reduce the re-inundation of-canyon reaches <br />upstream, <br /> <br />g - This concept could result ill greater connict between lake and downstream <br />river interests. since both resources could be significantly compromised from <br />current levels. The recently issued Record of Decision on the GCDEIS would <br />be moot and another ElS process would be required to resolve the newly <br />created connicts between uses. As with the Brower proposal, legislation <br />would be required to bring Lake Powell down to this lower level. <br /> <br />9 <br />
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