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~ Excepdpn"e~ lallUar" Februar March Ann) Mav Tune Illlv AUAust Se~temher October Nove-mh r Bp,-pmber 1% 26.25 1839 16.15 68.30 347.20 180.80 102.70 77.50 50.30 82.15 82.30 25.70 "i% 20.80 16.80 13.80 62.80 [98.10 155.80 88.80 48.80 37.80 31.80 29.30 21.80 10% 17.80 14.70 12.80 49.80 158.80 126.80 82.30 42.30 29.80 2980 20.80 19.80 20% 13.80 11.50 ]2.30 27.80 1]6.80 99.80 48.80 13.S0 26J~O 23.80 ]9.80 13.80 50% 9.30 8.80 10.75 17.80 34.30 50.80 19.80 17.80 ]6.80 17.80 11.40 9.30 'O~- 7.90 6.90 8.60 12.60 16.80 18.80 14.80 -]2.80 ..11.90 11.90 10.\0 8.30 90" 7.30 6.70 7,70 11.70 11.85 12.10 12.55 , 7.65 7.80 9.55 9.40 7.90 9"% 6.80 6.50 7.47 1 ].05 9.43 10.60 IO.45.i 6.90 730 8.27 8.80 7.50 99% 6.30 6.00 7.06 9.70 8.06 9.90;1 8.45 5.61 6,95 7.06 8.30 6.58 H (' ... . Table 2 shows that the winter recommendation of 4.75 cfs (October 15th - April 14th) is available at least 99% of the time at the upper end of the reach. Table 2 also shows that the summer flow recommendation of 9.1 cfs (April 15th - October 14th) is available at least 80% of the time at the upper end of the reach. I .... ~ ... Precipitation Data r r \.. Staff reviewed local precIpitation data sets from 4 different sites located around the Fourmile Creek Drainage (see Precipitation Data in Appendix C). These sites include Guffy (1951-1997), Canon City (1931-1997), Lake George (1948-97) and Ruxton Park. (1959-1997) (See Figure 3). Table 4 shows the water year and the percent of average precipitation recorded at each site. .. Table 4: Precipitation Data as a percentage 0 A vera "e. Water Year Guffv Canon City Lake George Ruxton Park 1992-93 86% 94% 70% 88% 1993-94 148% No Data 100% 129% 1994-95 139% No Data 114% 133% 1995-96 108% 115% 74% 95% 1996-97 103% 165% 74% 169% f \ ~ . Table 4 shows the wide vanatlon of precipitation between four relatively close precIpitation sites, the 1992-93 water-year was below average at all four sites, the 1994-95 water-year was above average for three sites and the 1995-96 water-year was above average for two sites and below average for two sites. It is staffs opinion that the five years of stream-t1ow data analyzed is representative of average to slightly above average water-years. However, because the requested t10w amounts were exceeded at least 80% of the time, no adjustment to the recommended instream t10w amounts was made. Figure 4 below shows the Fourmile Creek stream flow for the 1992-1997 time period. ~ r 1 'I'" r Figure 4: Fournile Creek Below Cripple Creek Near Vic~or, Co SLa~ioo Nunber: 07096250 .. 400_0 350..0 300..0 ~ ~ 250.0 ~ c 200.0 .~ ii 150.0 ~ ~ 100_0 ~ ~ ~ .~ 50..0 Q 0.0 I"" ~ - I '" 1993 1994 1995 1996 1997 r. .... Legend: Discharge, in CFS EsLinated Discharge, in CFS .. -~