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<br />Table 1: Data <br />Part <br />BLM <br /> <br />Date <br />10/02/1997 <br /> <br />Q <br />19.5 <br /> <br />250%-40% <br />48.6 - 7.8 <br /> <br />Summer 3/3 <br />12.4 <br /> <br />Winter (2/3 <br />10,8 <br /> <br />BLM =: Bureau of Land Management DOW = Division of Wildlife <br />(1) Predicted flow outside of the accuracy range of Manning's Equation. ? = Criteria never met in R2CROSS Staging Table. <br /> <br />Biologic Flow Recommendation <br />The summer flow recommendation, which meets 3 of 3 criteria and is within the accuracy range <br />of the R2CROSS model is 12.4 cfs (See Table 1). The winter flow recommendation, which <br />meets 2 of 3 criteria and is within the accuracy range of the R2CROSS model is 10.8 cfs (See <br />Table I). <br /> <br />Hydrologic Data <br /> <br />After receiving the cooperating agency's biologic recommendation, the CWCB staff conducted <br />an evaluation of the stream hydrology to determine if water was physically available for an <br />instream flow appropriation. The hydro graph below was derived from data collected by the <br />USGS stream gage for Thompson Creek near Carbondale, CO (ill #09083000), which has a <br />drainage area of75.4 square miles (See Gage Summary in Appendix C). The total drainage area <br />of the Thompson Creek Drainage upstream of the Northside Thompson Ditch Headgate is <br />approximately 75.4 square miles. The period ofrecord for this gage was 1950 to 1960 and 1964 <br />- 1968, the period of record used by staff in their analysis was was 1950 to 1960 and 1964 - <br />1968, or 14 years of record. Table 2 below displays the flow of Thompson Creek upstream of <br />the Northside Thompson Ditch Headgate (Table 2), in terms of a percentage of exceedence. <br /> <br />Table 2: Thompson Creek flow upstream of Northside Thompson Ditch Headgate. <br /> <br />~ <br />1% <br />5% <br />1<'" <br />m <br />50'/. <br />00'/. <br />00l\ <br />95% <br />- <br /> <br />...._ Fohn_ ....... Apil .." ...... JUy ~ """"" .....",.. ~ <br />8 9 16.32 139.4 2376 "'" 416.4 30.32 28 18 10 9 <br />8 7 14 94 1132 870 130.. 22.3 13 13 9 9 <br />7 7 11 7. 38ll.4 482 "". 18 9.8 10 9 8.1 <br />5 '.2B 88 .. 266.. 370 32 14 7.1 8.1 7.6 6.6 <br />4.3 4.5 6 25 156 133 " 6.9 4.3 4.6 4.7 46 <br />36 4 4.58 10 87.8 42 778 4.1 27 358 36 4 <br />3.5 3.' 42 7.8 54.4 28 6.14 338 23 3 34 3." <br />3.5 3.38 4 84 39 18 . 29 2 27 3 34 <br />32 ,." 293 368 28 092 4A 1.8 1.8 25 25 3 <br /> <br />Thompson Creek Stream Flow <br />u/s of the Northside Thompson Creek Ditch <br /> <br />20 <br /> <br />5 <br /> <br /> <br />15 <br /> <br />.l!! 10 <br />u <br /> <br />o <br /> <br />JAN <br /> <br />'EO <br /> <br />MAR <br /> <br />AeR <br /> <br />MAY <br /> <br />JON <br /> <br />..uc <br /> <br />^"G <br /> <br />SEP <br /> <br />OCT <br /> <br />NOV <br /> <br />DEe <br /> <br />Month <br /> <br />- 4- <br />