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<br />,~~,:-,..,.,.,. "'7"-
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<br />Table 3: Estimated Fourmile Creek now upstream of Trail Gulch
<br />
<br />~- -.lenN'< TAnuarV F..h,,"A... Mar"h Annl M.. June Julv Au....sf r O..tober Nov..mh....
<br /> 1% 26,25 18,'9 16,15 68,30 347,20 180,80 102,70 11.50 50,30 82,15 82,30 25,70
<br /> ~ ,n .n I_ .n ",8n _Hn '9',ln ,,<on ..,.n ....llIl '7ll1l " on '9 '0 21.llIl
<br /> 10% 17,80 14,70 12,80 49,80 158,80 126,80 8230 42,30 29,80 29,80 20,80 19,80
<br /> 20% 13,80 11.50 12,30 27,80 116,80 99,80 48,80 33,80 26,80 23,80 19,80 13,80
<br /> 50% 9.30 8,80 10,75 17,80 34.30 50,80 19,80 17,80 16,80 11.80 11.40 9,30
<br /> 00" 7,9n _on o_n ...n ><llIl 18,'0 I..n " on ~ --;-I~ In In "n
<br /> .." "n ..n oon I} 70 " 0< 12,10 12," v:;: ~ 9,<< 94n 700
<br /> ' ';;;;; <on _ <n 747 " n< 04' .nM .n4< _on 7,3n 077 . on 7 <n
<br /> ~m, _,n _no 7 n_ 07n on< 09n 04< <,61 <95 7,n< "n ..0
<br />
<br />Tables 2 and 3 show that the winter recommendation of 4,5 cfs (October 15th - April 14th) is
<br />available at least 50% of the time throughout the entire reach and 99% of the time at the lower
<br />end of the reach, Tables 2 and 3 also show that the summer flow recommendation of 9.4 cfs
<br />(April 15th - October 14th) is available at least 50% of the time throughout the entire reach and
<br />80% of the time at the lower end of the reach,
<br />
<br />Precioitation Data
<br />
<br />e
<br />
<br />Staff reviewed local precipitation data sets from 4 different sites located around the Fourmile
<br />Creek Drainage (see Precipitation Data in Appendix C), These sites include Guffy (1951-1997),
<br />Canon City (1931-1997), Lake George (1948-97) and Ruxton Park, (1959-1997) (See Figure 3),
<br />Table 4 shows the water year and the percent of average precipitation recorded at each site,
<br />
<br />4 P
<br />
<br />f
<br />
<br />Table: recloltation Data as a oercenta e 0 Average,
<br />Water Year Guffv Canon City Lake Georl!e Ruxton Park
<br />1992-93 86% 94% 70% 88%
<br />1993-94 148% No Data 100% 129%
<br />1994-95 139% No Data 114% 133%
<br />1995-96 108% 115% 74% 95%
<br />1996-97 103% 165% 74% 169%
<br />
<br />Table 4 shows the wide variation of precipitation between four relatively close precipitation
<br />sites, the 1992-93 water-year was below average at all four sites, the 1994-95 water-year was
<br />above average for three sites and the 1995-96 water-year was above average for two sites and
<br />below average for two sites, It is staff s opinion that the five years of stream-flow data analyzed
<br />is representative of average to slightly above average water-years, However, because the
<br />requested flow amounts were exceeded at least 80% of the time, no adjustment to the
<br />recommended instream flow amounts was made, Figure 4 below shows the Fourmile Creek
<br />stream flow for the 1992-1997 time period,
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