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<br />Table 2: Estimated Fourmile Creek Flow at Barnard Creek
<br />
<br /> .Ianuan: Fehmarv I\larch Anril 'fa v June luh-' Au<>ust Sentemher October ~ovemher Dtxember
<br />1(7c 16.55 11.00 9.42 46.24 243.11 125,65 70.52 52.n r :.3.53 56.01 56,12 16,16
<br />5% 12,71 9,88 7,76 42.35 137,86 108,00 60,71 32.47 24.71 20,47 18.71 13.41
<br />10<;< 10,59 8,40 7,06 31.18 110.12 8753 56.12 27,88 19,06 19,06 12.71 12,00
<br />20% 7,76 6,14 6,71 17,65 80,47 68,47 32,47 21.88 16,94 14,82 12,00 7,76
<br />50% 4.59 4,24 5,61 1059 22.24 33,88 12.00 10.59 9,88 10,59 6,07 4.59
<br />SOCfc, 3,60 2,89 4,09 6,92 9,88 11.29 8,47 7,06 6,42 6,42 5.15 3,88
<br />90% 3.18 2,75 3.46 6.78 6,39 6.56 6,88 I 3.4' :t,B 4,76 4,66 3,60
<br />95% 2.82 '"'.61 3.30 5,82 I -1,68 5.51 5.-l0 2.89 1,[8 3,86 4.24 3.32
<br />99% 2.-n 2.26 3,01 4,87 _~.71 5,01 3.99 1.98 2.93 3,01 3,88 2.o?
<br />
<br />Table 3: Estimated Fourmile Creek Flow upstream of High Creek
<br />
<br /> lanuarv Fehruarv .'\.-larch And( :\-fav Tune .fulv Au""ust Sentemher Ot,tober :Sovember Oecember
<br />1% 17,93 11.92 10,21 50,09 263.36 136.12 76.39 57.12 36.32 60,68 60,79 17.51
<br />5% 13.76 10.71 8,41 -15,88 ]49.35 117.00 65.76 35.18 26.76 22.18 20,26 14,53
<br />10% 11.47 9,10 7,65 35.94 119.29 94,82 60,79 30,21 20.65 20,65 \3,76 \3,00
<br />20% 8,41 6,65 7,26 19.12 87,18 74.18 35.18 23,71 18.35 16,06 13,00 8,41
<br />50% 4,97 4,59 6,08 11.47 24.09 36,71 13.00 11.47 10,71 11.47 6,58 4,97
<br />80% 3,90 3.14 4,44 7.49 10.71 12.24 9,18 7.65 6,96 6,96 5.58 4,21
<br />90% 3.44 2,98 3,75 6,81 6,92 7.11 7,46 I 1.71 1.82 5,16 5.05 3,90
<br />95% 3,06 2,83 357 6.31 f 5,07 5,96 5.85 I 3.14 3.+1- 4,18 4.59 3.59
<br />99% ".68 2.45 3,26 5,28 ..t02 5.43 4.31 ".15 3.17 3,26 4.21 2.89
<br />
<br />Tables 2 and 3 show that the winter recommendation of 2,75 cfs (October 15th - April 14th) is
<br />available at least 90% of the time throughout the entire reach, Tables 2 and 3 also show that the
<br />summer flow recommendation of 5,8 cfs (April 15th - October 14th) is available at least 80% of
<br />the time throughout the entire reach,
<br />
<br />Precipitation Data
<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 />T bl 4 P
<br />
<br />fA
<br />
<br />D
<br />
<br />a e reclpltatlon ata as a percentage 0 verage.
<br /> Water Year Guffy Canon Citv Lake George 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 vanatlOn 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 staffs 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,
<br />
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