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<br />preservation of the natural environment the recommended summer and ",,'inter flows of 5.2: and
<br />1.3 cfs \\-'ere reduced further. Based on the above water availability analysis the Northwatcr
<br />Creek instream flow should he changed to 5.2 cfs (April 15 - ~'lay 31). 4.0 cfs (June I - June
<br />30). 1.0 cfs (July I - August 31),0.5 cfs (Seplember I - October 14).0.3 cfs (October 15-
<br />.\1arch 14) and 0.7 cfs (!\-larch 15 - April 14). Tables 4 and 5 below show how often these
<br />proposed flow recommendations would be available in orange shading.
<br />
<br />E '"
<br />
<br />TaM..~: ....nrth....t..r Creck dn..n_tr"'.lm of Ha_pllt'rT) Cn"(.k
<br />J Fd~u \\ h A I 'I J J t
<br />
<br />"
<br />
<br />~(lo.:~:-';mho.:Dc~
<br />
<br />we ~~ Jnuarv ~ "~ A<'''' ,,-\' "~ "' AUl'U'1 ..epleBl , "" " .me " :..:em >,
<br /> '" OAR 0.52 1.66 30.52 76.>1 16.119 2.23 139 1.10' 1.10 0.66' 0.66
<br /> '" 0.36 OA5 1.15 18.70 59.8.\ 10.2.~ 1.99 1.21 0,66 0.72 0,60 0.61 ,
<br />l(n 0..13 0,"" 0.86 13.27 ~5.24 7.2~ 1.81 1.15 0,60 U.72 0.57 0.54
<br />2(l't 0.33 0.36 0.72 6.03 3~U5 ;.52 1.69 1.03 0.53 0.58 0.51 0..19
<br />.'" 0.17 0..1I (L~2 1,6-' 12.67 ! 2.~1 1.15 U_72 I),~-~ U,.l,\ 039 0.30
<br />~11'Ji 0.111 0.18 0.30 0.72 I_n_-, 05-1 (l,.l:'l n_2,' 0.27 O.N U.27 U_22
<br />.'" (U~ U.t~ 11.20 060 0.60 0.17 (LIZ (),19 n_2~ 0,22 0_16 0,15
<br />':!Yl 1l.1~ (1_14 0.14 OA:'I O_.U n.21 lUll (Un n.I':! 0.19 0.1'\ 0.1:'1
<br />"". 0_14 (l,12 01' (UK 0.27 ct.l':! 0.0_' (l.02 0.19 U.14 11_1,1 0.1'\
<br />
<br />E d
<br />
<br />T..hlt,!I: ....nrth....lt.r C1Vl..k Up'In-..m or Tnppt.r; Cfn'k
<br />J Fehr M h "'1 J
<br />
<br />JI
<br />
<br />s
<br />
<br />" ~
<br />
<br />~ ""n""
<br />
<br />\l'ee<-n.-...,,- anuar..' uar.' .If<' A~I " ,~ " .....Ul'U_l _<'l'l<'mh..'r '1<' " N\>\'t"Bl >, 'ce
<br />to 0,80 0.86 2.75- SO,60 126.90 28.00 3.70 2.3] L82 1.83 1.10 1.10
<br />" 0,60 O.7~ 1.91 31.nJ 99,20 17.00 .DO 2.m 1.10 1.20 UI() 1.01 ,
<br />1(1'0 0.55 0.67 I..n 2200 75JXl lUll .loo 1.90 0,99 1.20 0.95 (),90
<br />.:'()<'i 0," 0,60 1.20 12JO 58.00 7.50 2,"" 1.70 0.118 0.97 0.85 (),64 ,
<br />"" 0.45 0.'52 0,86 :UU 21.00 ',00 1.90. 1.20 0.74 0.75 0.65 050
<br />~ll'k -l!.!>(l"" _0.30_ 050 l.2u I.7U (J.'X) 0.75 0.39 OA5 OAg _OA5 _OJ7_
<br />.'" n.n 0_2., O.U l.m 110 0.45 0_20 IUI OAU IU7 0.26 O.2.'i
<br />'Wl 02_t 0.23 (l_2~ ().7~ n.'\'\ (U_~ 0.17 tl.lI.'i U.ll 0.32 1l_!:'I 0.25
<br />"'" 0.23 0_::':0 u.n (lA' OA:'I U.31 O_().~ (J,(H o_n tl_2.l 0.22 0_25
<br />
<br />The above flow recommendation \vould require the ewcs to file for a 4.2 cf~ enlargement from
<br />April15lh to ~1ay 31\-1 and a 3.0 cfs enlargement June 1'1 to June 301h. It would also require the
<br />eWCB to modify its' current 1.0 cfs decreed water right (Case No. 5-85CW635) downward
<br />belween September I" through April 14th. After consulting with the CDOW and discussing the
<br />importance of maintaining Colorado River Cutthroat Trout habitat. staff feels it is nOI appropriate
<br />t() modify the eWCB Northwater Creek Instream Flow Water Righi downward al this time.
<br />
<br />Precipitalion Data
<br />Staff reviewed local precipitation data sets from 4 different sites localed around the NOl1hwaler
<br />Creek Drainage (see Precipitation Data in Appendix C). These sites include Rangely, Rifle.
<br />Collhran and Meeker (See Figure 3). Table 6 shows the watcr year and the perce III of average
<br />precipitation rccorded at each site.
<br />
<br />T bl 6 P
<br />
<br />D
<br />
<br />f
<br />
<br />a c reClOllatlon ata as a percenta1!e 0 Avera1!e.
<br /> Year Ran1!elv Rifle Collbran ~leeker
<br /> 1976,77 72% 71% 76fJ('
<br /> 1977,78 116'7< 95%
<br /> 1978,79 105% 118'7< 102%
<br /> 1979,80 106% 113'7,
<br /> 1980,81 168% 12:9% 119'7< 121%
<br /> 1981,82 177% 139% 131% 140'7<
<br /> 1982-83 168% 141'7< 112%
<br />
<br />(II Indll.--':Il<,,_nu\-<mg-dl1.1
<br />
<br />Table 6 shows the ,..'ide vanal10n of precipilation between four relatively close precipilation
<br />sites. the 1976-77 \V.uef-year was well helow average at three sites. the 1977-78 water-year was
<br />
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