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<br />.Tables 2 and 3 show that the summer recommendation of 1.9 cfs is available 50% of the time for
<br />the month of May, 20% of the time for April and June and I % of the time in July throughout the
<br />entire reach. Tables 2 and 3 also show that the winter recommendation of 1.5 cfs is not
<br />available. Based on the above water availability analysis and the requirement of the CWCB staff
<br />to balance the needs of mankind with a reasonable preservation of the natural environment the
<br />recommended summer and winter flows of 1.9 cfs and 1.5 cfs were reduced further. Staff
<br />recommends that the proposed flow recommendation be changed to 1.9 cfs (April 15 - June 30),
<br />0.6 cfs (July I - August 31), 0.2 cfs eSeptember 1 - March 14) and 0.4 cfs eMarch 15 - April
<br />14). Tables 4 and 5 below show how often the new flow recommendations are available at the
<br />upstream and downstream tenninus in orange shading.
<br />
<br />Tabel 4: E. Fk. Parachute Ck at conti. W/JQS Gulch & Golden Castle Gulch
<br />
<br />:x;-edence J~n"A_' F-b,"a," March lI.nril M'" '''no Jul" Aunust Sentember nclnbor Nov<>mhar Dec"'mhaT
<br />1% 0:';'- '\45 0..74 1',= 60.03 -.;;os "17 1.26 n,65 0,59 0.38 024
<br />1::% 0.,28 0,28 0...' 10..'7 0.,37 14.11 1.00. 0..0.. 0.40. 0,40 0.28 021
<br />1 % non 0..24 0.."" 70.1 ""!V> 7.48 1.07 0..7' 0..41 0,32 0,26 021
<br />20% 0,16 0,19 0.43 3.85 20.31 4.49 0.98 0,49 0.30 0.26 0.24 0,19
<br />50% 0,13 0.15 0.21 1.26 8.44 1.56 0,56 0,32 0.21 021 020 0.14
<br />At"% nno 0.11 0,17 0.,41 0.64 0,30 0,20 0.,10. 0.07 0..15 0.14 0.,10
<br />--0;;/0 --0'"06 0,08 0.15 0..24 0.27 0,10 0.04 0."7 0."" 0.00 0..10 n.no
<br />~/D 0,08 0,08 ~ 0..'0. 0,21 0,07 0..0.' 0.0.2 0.04 0,07 0.,09 0,08
<br />---nn% ^^7 0,07 0,11 "17 0,19 0,07 o.m n.n2 0..04 0,06 0.09 0,08
<br />
<br />Table 5: E. Fk. Parachute Ck upstream of Second Anvil Creek
<br />
<br />:~--...I-n-e lanua-' Febru--' M-r-h Anril Ma" .Iune '''I'' A"n".' Sentember October November TN:>cember
<br />1% 0.01 on, 1 <1 ~.'7 122.m- ~ -':44 2."" 1." 1.on n.T? 0.48
<br />I::O{, 0..= '\56 107 '10.7 73.91 -= "44 2.~ .~ n.R? n.56 n,L'
<br />10% 0.41 0.40. 1,17 16.OR <2..0 '<'1 '.7. 1.46 0...0 0..0< 0.,<' 0.."
<br />20% 0.32 0.40 0.87 7.82 4128 9.12 2.00 1.00 0.61 0.52 0.48 0.40
<br />50% 027 0.30 0.43 2.56 17.16 3.17 1.13 0.65 0.43 0.43 0.40 028
<br />Ar% 0,1 0.,20 0.,0< 0.00 1,00. 0.,61 0,41 0.,21 0.1< 0.01 0.28 0.21
<br />---01\0/0 --0:-17 n.1? 0.,30 0,48 ,5< 0..27 0..00 0.14 0,11 0.17 0,20 0..17
<br />~/o ~17 -;;:-17 0,26 0,40. 0,40 0.1< 0..0.7 n.03 0,"" 0,14 0,17 0.,17
<br />---000/0 0.1< n:i< 0..22 -;;,05 0,40 0.1' --,;n;; nM nm 0.13 0.17 ,17
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<br />Precipitation Data
<br />Staff reviewed local precipitation data sets from 4 different sites located around the East Form
<br />Parachute Creek Drainage esee Precipitation Data in Appendix C). These sites include Rangely,
<br />Rifle, Collbran and Meeker (See Figure 3). Table 6 shows the water year and the percent of
<br />average precipitation recorded at each site.
<br />
<br />Table 6: Precipitation Data as a percentage of Average.
<br />
<br />Year Ranllelv Rifle Collbran Meeker
<br />1976-77 72% 71% 76%
<br />1977-78 116% 95%
<br />1978-79 105% 118% 102%
<br />1979-80 106% 113%
<br />1980-81 168% 129% 119% 121%
<br />1981-82 177% 139% 131% 140%
<br />1982-83 168% 141% 112%
<br />
<br />()
<br />
<br />Indicates missing data.
<br />
<br />Table 6 shows the wide variation of precipitation between four relatively close precIpItation
<br />sites, the 1976-77 water-year was well below average at three sites, the 1977-78 water-year was
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