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WSP02327
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Last modified
1/26/2010 12:36:13 PM
Creation date
10/11/2006 11:03:00 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8240.200.40.H
Description
Yampa
State
CO
Basin
Yampa/White
Water Division
6
Date
9/21/1995
Title
Instream Flow Filings for Endangered Fish in the Yampa - Options - Draft
Water Supply Pro - Doc Type
Report/Study
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<br />. <br /> <br />. <br /> <br />. <br /> <br />Colorado Water Conservation Board <br />Endangered Fish Recovery Instream Flow Appropriation <br /> <br />YAMPA RIVER AT MAYBELL <br /> <br />Draft September 21, 1995 <br /> <br />ALTERNATIVE I: Compact Development Allowance Excluded from Instream Flow <br /> <br />AssumDtions: <br /> <br />1a. The U.S. Fish & Wildlife Service (Service) has made flow recommendations for <br />dry (80% exceedance), average (50% exceedance), and wet (20% exceedance) <br />years during August through March (non-runoff months). The Board would <br />appropriate the wet year recommendations (the higher flow recommendations for <br />the non-runoff months). However, no administration of the flow recommendations <br />would be sought until the first level of compact development allowance (a total <br />of 164,572 af annually) as distributed on a monthly basis during the August <br />through March period (Table 1) is used up. This insures the first level of compact <br />development allowance is fully used before flow recommendations are enforced. <br />Once the first level of compact development allowance is used up on either a <br />monthly or annual basis, a call for recovery instream flows would be made at the <br />wet year recommendation level, unless modifications are made which allow the <br />use of all or a portion of the second level of compact development allowance <br />(Paragraph 4 water). <br /> <br />lb. For April, May, June, and July (runoff months), the Service has recommended <br />protection of all flows which remain after Section 7 Baseline depletions have been <br />accounted for (Table la). Because no specific flow values were actually provided <br />by the Service for these months, the staff has assumed that the 10% exceedance <br />level flows as defmed in the Board's Yampa River Physical Water Availability <br />Study (1970 - 1992) will be the flows appropriated (Table Ib). These flow levels <br />are assumed to be reflective of the Service's recommendations for the months of <br />April, May, June and July. Again, no administration of the flow recommendations <br />would be sought until the first level of compact development allowance as <br />distributed on a monthly basis during the runoff months (Table 1) is used up. <br />Again, this insures the first level of compact development allowance (a total of <br />164,572 af annually) is fully used before flow recommendations are enforced. <br />Once the first level of compact development allowance is used up on either a <br />monthly or annual basis, a call for recovery instream flows would be made at the <br />10% exceedance flow level during these 4 months, unless modifications are made <br />which allow the use of all or a portion of the second level of compact <br />development allowance (Paragraph 4 water). <br /> <br />2. Water is physically available for USF&WS flow recommendations as per the study <br />conducted by the Colorado Water Conservation Board (Board) staff which was <br />based largely on work done for the Board by Leonard Rice Consulting Water <br />Engineers. <br /> <br />I - 1 <br />
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