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<br />. <br /> <br />. <br /> <br />. <br /> <br />Miguel River 3.0 miles west of the Butcher Creek drainage. The hydro graph below was derived <br />from data collected by the USGS stream gage for the San Miguel River near Telluride, CO (ill <br />#09171200), which has a drainage area of 42.8 square miles (See below). The drainage area of <br />Butcher Creek is approximately 0.7 square miles. Staff used a basin apportionment method to <br />estimate stream flows for Butcher Creek (See Gage Summary in Appendix C). The period of <br />record for this gage was 1959 to 1965, the period of record used by staff in their analysis was <br />1959 - 1965, or six years of record. Table 2 below displays the estimated flow of Butcher Creek <br />above the San Miguel River, in terms of a percentage of exceedence. <br /> <br />Table 2: <br /> <br />Butcher Creek Estimated Stream Flow <br /> <br />3.00 <br />2.50 <br />2.00 <br />~ 1.50 <br />1.00 <br />0.50 <br />0.00 <br /> <br /> <br />~--v ~ ~~ -1~ ~)- </v--V </~ -1vQ U'~ 00.,>- "Vat.- ()~o <br /> <br />Month <br /> <br />Table 2 shows that the summer/winter recommendation of 0.65 cfs is available at least 50% of <br />the time from May 15th through July 31 st. The summer/winter recommendation was further <br />reduced to 0.20 cfs from August 1 st through May 14th due to water availability concerns. <br /> <br />Precipitation Data <br />Staff reviewed local precipitation data sets from 2 different sites located around Butcher Creek <br />Drainage (see Precipitation Data in Appendix C). These sites include Telluride (1900-1999) and <br />Ames (1914-1986). Table 3 shows the water year and the percent of average precipitation <br />recorded at each site. <br /> <br />Estimated Buthcher Creek Stream Flow <br />Exceedences <br />1% <br />5% <br />10% <br />20% <br />50% <br />80% <br />90% <br />95% <br />99% <br /> <br />January February March April May June July August September October November December <br />0.21 0.24 0.60 1.24 4.81 5.56 4.95 2.44 1.10 0.57 0.40 0.27 <br />0.20 0.23 0.36 1.07 4.14 4.93 4.26 1.43 0.87 0.47 0.34 0.24 <br />0.19 0.23 0.28 0.93. 2.84 4.28 3,19 1.12 0.77 0.45 0.33 0.23 <br />0.19 0.21 0.24 0.72 2.19 3.68 2.39 0.90 0.67 0.39 0.31 0.21 <br />0.18 0.18 0.19 0.42 1.41 2.76 1.15 0.61 0.44 0.32 0.26 0.20 <br />0.17 0.17 0.17 0.26 0.83 1.57 0.65 0.46 0.32 0.27 0.24 0.19 <br />0.15 0.17 0.17 0.19 0.52 1.38 0.53 0.39 0.31 0.26 0.23 0.19 <br />0.15 0.17 0.17 0.19 0.43 1.19 0.48 0.34 0.30 0.26 0.23 0.15 <br />0.15 0.17 0.14 0.19 0.34 0.96 0.39 0.32 0.29 0.25 0.21 0.15 <br /> <br />- 5 - <br />