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<br />10-11-95
<br />
<br />Colorado Water Conservation Board
<br />Spedai Board Meeting - October 20, 1995
<br />Grand Junction, Colorado
<br />
<br />Recovery Instream Flow
<br />15 Mile Reach, Colorado River
<br />
<br />Table 1. Fish and Wildlife Service Flow Recommendationsl : Monthly Flows,
<br />\ Recommended mean monthly flows for the top of the IS Mile Reach in cubic ftlscc, Rate is
<br />the percent of years that the recommended flows should be provided based on winter
<br />snowpack levels. For example, in the wettest 25% of years, flows in June should average at
<br />least 15,660 cfs; stated another way, this recommendation should be met in 5 of every 20
<br />years, During low water years, June flows should average no less than 6,850 cf5, and such a
<br />minimum should occur ata rate of no more than 4 in 20 years (20%) ~c~
<br />
<br /> '/(>1"
<br />.... E=al, ocr NOV DEe IAN FED MAR A1'R ~ JUN JUL AUG SEP
<br />25,. 25,. 1.630 1.630 1,630 1,630 1.630 1,630 3,210 l =11., 15,660 7,060 1,630 1.630
<br />SO,. SO,. 1,630 1.630 1.630 1,630 1.630 1,630 2.440 9,3iP--' 14,150 S.370 1.630 1.630
<br />30,. SO,. 1.140 1.630 1,630 1.630 1,630 ].630 2.260 7,710 II,JSO J.ISO ].2'" 1.240
<br />20,. I()O" 810 1.240 1,240 1.240 1,240 1,240 1.860 7,260 6,&50 1.480 8]0 8]0
<br />
<br />Table 2.
<br />VOLUME (ACRE FEET) FOR FWS FLOW RECOMMENDATIONS
<br />
<br />,.e..c ocr NOV Dee )AN FED MAR A1'R MAY JUN IUL AUG SEP
<br />2:>" 100226 96993 100226 100226 90527 100226 191011 6591,., 9J 1848 434109 100226 96993
<br />SO,. 100226 9699J 100116 lOOll6 90521 100116 145191 S16161 141946 ))0193 100226 9699J
<br />SO,. 76246 96993 100226 100226 90527 100226 134481 474076 675382 193689 76246 73786
<br />)00" 49806 7)786 76246 76246 68867 16246 110679 - 407609 91003 49806 48]99
<br />
<br />SUMMARY OF VOLUME VALVES
<br />VOLUME (ACRE FEET) FOR FWS FLOW RECOMMENDATIONS
<br />
<br />OCT. ....PR - AUG- roTAL
<br />MAR JUt. SEP
<br />5U424 2216125 197219 lOO1769
<br />5&&n4 1100094 197119 2613738
<br />,..... Icn62! IlOOJ' 2192104
<br />421197 1055697 ."'" 1574199
<br />
<br />Runoff Months:
<br />Non Runoff Months:
<br />
<br />April through July
<br />August through March
<br />
<br />Source: "Rela[ionships between Flow and Rare Fish Habitat in the '15-Mile Reach' of th.e Upper Colorado Ri"'er~, U.S. Fish & W}Idlife SerVice,
<br />
<br />1995,
<br />
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