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<br />flow recommendation, which meets 3 of 3 criteria and is within the accuracy range of the
<br />R2CROSS model is 9,0 cfs, The winter flow recommendation which meets 2 of 3 criteria and is
<br />within the accuracy range of the R2CROSS model is 3,5 cfs (See Table 1),
<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, There are no currently operated or historically operated streamflow
<br />gages for this reach, The closest gage CWCB staff found was the gage located on the San
<br />Miguel River 3.4 miles west of the Comet Creek drainage, The hydrograph was derived from
<br />data collected by the USGS stream gage for the San Miguel River near Telluride, CO (ID
<br />#09171200), which has a drainage area of 42,8 square miles (see below), The drainage area of
<br />Comet Creek is approximately 3,3 square miles, Staff used a basin apportionment method to
<br />estimate stream flows for Comet 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 seven years of record, Table 2 below displays the estimated flow of Comet
<br />Creek, in terms of a percentage of exceedence,
<br />
<br />Table 2: Estimated Stream Flow on Comet Creek:
<br />Exceedence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nav Dee
<br />1% 1.4 1,5 3,9 8,0 31,2 36,1 32,1 15,8 7,1 3,7 2,6 1,8
<br />5% 1,3 1,5 2.4 6,9 26,9 32,0 27,6 9,3 5,6 3,1 2,2 1,5
<br />10% 1,2 1,5 1,8 6,0 18.4 27,7 20,7 7,3 5,0 2,9 2,2 1,5
<br />20% 1,2 1.4 1,5 4,7 14,2 23,9 15,5 5,9 4,3 2,5 2,0 1.4
<br />50% 1,2 1,2 1.2 2,7 9,2 17.9 7,5 3,9 2,8 2,1 1,7 1,3
<br />80% 1,1 1,1 1,1 1,7 5,4 10,2 4,2 3,0 2,1 1,8 1,5 1,2
<br />90% 1,0 1,1 1,1 1,2 3.4 8,9 3.4 2,5 2,0 1,7 1,5 1.2
<br />95% 1,0 1,1 1.1 1,2 2,8 7,7 3,1 2,2 1,9 1,7 1,5 1,0
<br />99% 1,0 1,1 0,9 1,2 2,2 6,2 2,5 2,1 1,8 1,6 1.4 1,0
<br />
<br />Estimated Stream Flow on Comet Creek
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