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<br />10-17-95 <br /> <br />Colorado Water Conservation Board <br />Special 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 15 Mile Reach in cubic ftIsec. 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 cfs. and such a <br />minimum should occur ata rate of no more than 4 in 20 years (20%) (,^""L~ <br /> <br /> / >;v <br />Rale Ex=d. ocr NOV DEC JAN FED MAR APR ........y JUN JUL AUG SEP <br />25% 25% 1,630 1,630 1,630 1.630 1.630 1,630 3.210 l on."n 15.660 7.060 1.630 1.630 <br />50% 50% 1,630 1,630 1.630 1.630 1.630 1,630 2.440 9.3~ 14,250 5.370 1.630 1.630 <br />30% SO% 1,24<) 1.630 1,630 1,630 1.630 1.630 2,260 7,710 11,350 3.150 1.24<) 1.24<) <br />20% 100% 810 1.240 1,240 1.240 1,240 1.240 1,860 7,260 6.&50 1.480 810 810 <br /> <br />Table 2. <br />VOLUME (ACRE FEET) FOR FWS FLOW RECOMMENDATIONS <br /> <br />%E.c ocr NOV DEC JAN FED MAR APR MAY JUN JUL AUG SEP <br />25% 100226 96993 100226 100226 90527 100226 191011 6S9157 931848 434109 100226 96993 <br />50% 100226 96993 100226 100226 90527 100226 145192 576762 847946 330193 100226 96993 <br />SO% 76246 96993 100226 100226 90527 100226 134481 474076 675382 193689 76246 73786 <br />100% 49806 73786 76246 76246 68867 76246 110679 446406 4fJ/(fJ9 91003 49806 48199 <br /> <br />SUMMARY OF VOLUME VALUES <br />VOLUME (ACRE FEET) FOR FWS FLOW RECOMMENDATIONS <br /> <br />OCT. APR. AUG- TUfAL <br />"'A" JUL SEl' <br />S8&424 2216125 19n19 3001769 <br />583424 1900094 197219 2685738 <br />,""" 14n628 150032 2192104 <br />421197 IOSS697 '1lOl2S 1574899 <br /> <br />Runoff Months: <br />Non Runoff Months: <br /> <br />April through July <br />August through March <br /> <br />Source: "Relationships between Flow and Rare Fish Habitat in the '15-Mile Reach' of the Upper Colorado River", U.S. Fish & Wildlife Service, <br /> <br />1995. <br /> <br />I <br /> <br />95C 1500 <br />