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WSP01713
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Last modified
1/26/2010 12:32:24 PM
Creation date
10/11/2006 10:37:29 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8220.101.09
Description
Glen Canyon Dam/Lake Powell
State
AZ
Basin
Colorado Mainstem
Date
9/1/1987
Title
Comments re: GCES Draft Technical Integration Report
Water Supply Pro - Doc Type
EIS
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<br />. <br /> <br />. <br /> <br />PaQe <br /> <br />eOlll1lents <br /> <br />69 Figure VII-6. Release pattern, as referred to in the text in the 1st <br />paragraph, is missing. <br /> <br />General note: The discussion in the second paragraph would indicate <br />that rafters do not place such a high value on "naturalness" after all. <br /> <br />75 Last paragraph. Why is the option of artificially protecting camping <br />beaches summarily rejected with little or no investigation? This would <br />seem to be a reasonable direction to take, unless it can be shown not <br />to be viable. The costs, feasibility, and possible impacts of making <br />operational modifications were considered beyond the scope of the <br />study, but changes to operations were not eliminated from consideration <br />on the same grounds. <br /> <br />76 1st paragraph. In keeping with the study approach proposed by Western, <br />conclusion (1) is better phrased, "Downstream environmental and <br />recreational resources would benefit from the elimination of flood <br />releases and minimization of fluctuating flows. II <br /> <br />Last paragraph. Western di sagrees that "Daily fl uctuat ions <br />degrade the natural character of the environment " any more than <br />artificially b10ck-loaded flows would. <br /> <br />77 2nd Paragraph. Fluctuating flows do not lead to a loss of backwater <br />habitat. These backwaters formed in a fluctuating flow regime in the <br />post-dam period--there were no pre-dam backwaters. Possible flow <br />patterns exist that would result in the creation of more backwater <br />area, or may result in the preservation of backwaters existing at a <br />given point of time. This again points out the inappropriateness of <br />using an idealized baseline for comparison. <br /> <br />4th paragraph. Under conclusion (2), why was it decided that only the <br />CRSP water delivery requirements were binding? As an assumption in the <br />various technical analyses it made sense to use this parameter, but <br />this passage indicates it has some higher importance than all of the <br />other provisions of the CRSP act and other "1aw of the River" <br />components. <br /> <br />The text to recognize that the area downstream of Glen eanyon Dam is <br />and always has been a dynamic environment. Grand Canyon itself was <br />formed by the "degradation" of natural resources. Steady releases of <br />annual runoff may preserve for the short run the status quo, but it <br />wi 11 not be II natura l" at all. <br /> <br />78 Under ManaQement Options, the stUdy seeks to convince the Secretary of <br />the Interi or that "impacts" to the recreati on resources are justifica- <br />tion for taking action. Western disagrees with this approach. The <br />question before the Secretary is whether or not improving the recrea- <br />tional resource is worth the costs to other river interests. The GCES <br />should have focused its efforts more on providing the Secretary with <br />options that would achieve the study's goals, and the potential costs <br />of these options, than trying to justify a change based on "impacts" to <br /> <br />7 <br />
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