ISFAPPC00947

• Case Number: 02CW0268
• Stream Name: Groundhog Gulch
• Watershed: San Miguel River
• Water Division: 4
• Water District: 60
• County: San Miguel
• Instream Flow App - Doc Type: Supplemental Data

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Groundhog Gulch Estimated Stream Flow

$
o

14
12
10
8
6
4
2
o

~~ ~~ %',,? ~~ %,)- vu~ v~ ~UQ ~~ 00)- ~Ot" o~o

Month

Table 2 shows that the summer recommendation of 0.9 cfs is available at least 50% of the time
from May 15th - October 14th and the winter recommendation of 0.6 cfs is available October 15th
- May 14th.

Precipitation Data
Staff reviewed local precipitation data sets from 2 different sites located around the Groundhog
Gulch Drainage (see Precipitation Data in Appendix C). These sites include Telluride (1900-
1999) and Ames (1914-1986). Table 3 shows the water year and the percent of average
precipitation recorded at each site.

Table 3: Precipitation Data as a percentage of Average.
Water Year Telluride
1959 96 %
1960 90 %
1961 127 %
1962 85 %
1963 11 7 %
1964 11 7 %
1965 139 %

Ames
88 %
91 %
109%
88 %
97%
81 %
139%

Table 3 shows a slight variation of precipitation between the two relatively close precipitation
sites. It is staffs opinion that the seven years of stream-flow data analyzed is representative of
average to slightly above average water-years.

Existing Water Right Information

Staff has analyzed the water rights tabulation and consulted with the Division Engineer Office to
identify any potential water availability problems. There are no decreed surface diversions within
this reach of stream. Based on this analysis staff has determined that water is available for

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