ISFAPPC05340

• Case Number: 00CW0130
• Stream Name: Northwater Creek
• Watershed: Parachute Creek
• Water Division: 5
• Water District: 39
• County: Garfield
• Instream Flow App - Doc Type: Supplemental Data

Table 1: Data

Parh Dale 0 250%--10% Summer (3/3) Winter (2/3)
BLM 7/9/98 3,15 7,9 1.3 5.2 1.3

Bl~l" Rureau of Land ~1anag"mcnl 1 I) Pr.:dtcl..d no..' "Ul~tdc: oflhe accuracy range of Manntrl~'~ Equalton
?" emma ne".... mel in R~CROSS Staging Table

Biologic Flow Recommendations
The BL~1 recommended a 5.1 and 1.7 cfs summer flow and a 1.0 cfs winter flow based on their
July 9th. 1998. data collection effort and their water availability analysis. Staff has reviewed the
data collected by the BLM. The summer flow recommendation. which meets 3 of 3 criteria and
is within the accuracy range of the R2CROSS model. is 5.2 cfs. The winter flow
recommendat ion. which meets 2 of 3 criteria and is within the accuracy of the R2CROSS model.
is 1.3 cfs.

Hydrologic Data

After receiving the cooperating agencies' biologic recommendation. the CWCB staff conducted
an evaluation of the stream hydrology to determine if water was physically availahle for an
instream flow appropriation. The hydrograph was derived from data collected by the USGS
stream gage for Northwater Creek near Anvil Points (10 #09092830). which has a drainage area
of 12.6 square miles (see Gage Summary in Appendix C). The period of record for this gage is
1976 to 1983. the period of record used by staff in their analysis was 1976-1983. or seven years
of record. The estimated drainage area of Northw3ter Creek downstream and including
Raspberry Creek is approximately 7.6 square miles. Tables 2 and 3 below displ:JY the estimated
flow of Northwater Creek at the confluence with Raspberry and Trapper Creeks. in term\ of a
percentage of exceedence. The orange and blue shading highlights how often the summer and
wimer now recommendations have been available.

E

Tallk' 2; ~onh"aler Cr>:1:k do"n~lream lit Ra"Plwrry' Cn,,'k

JI.~c:c:dclll'<'~ Janu3n F<.'llru<m' ."l~h Arml Mav JUI'lC Jul~ ....Ul!U~1 S<'Ol..mh;t Ol:wher .~\)\'cml>l'r De..:<'tnllcr
,~ IIA8 0.~2 LOb 30.52- -76:54' 16~89- 2,23 I.W J.JO 1.10 Il_M tlM
" (Un OA~ I I~ 18.70 59.83 1O.2S 1.99 1.21 tJ.f>O 0.72 {J.60 0.6]
'''' (J,n OAO 0_86 13.27 4S.24 7.24 1.111 , " 0"" 0.72 f),~1 054
2tn- O..~.' 0.36 0.72 . 6.03 .'.'US 4.S2 1.69 L03 05.' O.511 O.~I 0..,9
,,. 0.21 0.31 0.52 1.63 _12.6'L HI 1.15 0.72 OA5 OA~ O..W 0.30
~t)'l- 0.18 0.18 0._.0 0,12 1.0-' 0.54 OA5 0_23 0.21 O.~<,) O.~7 0.22
"'" 0.14 0.14 O.~O 0.60 O,Ob 0.27 0_12 0.1<,) 0_24 0.22 0.16 0.15
9.'Vf 0.14 0.14 0_14 OA~ 0...3 0.~1 0.10 0.03 1l_19 n.19 0.15 0.15
"'~ 0_14 0,12 0.13 O..~S 0.27 lJ.19 tl_tl.l n,02 0.19 014 0.1.1 0.15

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TlIllIl" .1:~onh"al..r (:n..,1i. up"ln'am urTrap~o ('"",Ii.
J Fe" M hiM J

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tr~ <'Ill-r~ anuan ru~ , Me Ac"' " "~ "' AIl~U..1 ,'C:f'lcmocr '10 " ~m.c , Dt'ccml>c:r
'" O_SO n,ll(, 2.75 50.60 "126'.90'" 28.00- .1_70 2..H 1.82 IXI , '" 1.10
" 0,,," 0.74 1.91 31.00 99.20 17.00 3.30 2.m LlO 1.20 1.(.1 1.01
'''' 0.~5 0.61 \.4.1 22.00 75.00 12.m 3.00 1.90 0.99 I.~O 0,95 0,90
'''' ll.54 0.60 1.20 , 10.00 58.60 7.50 1,"" 1.10 (lll8 0.97 (U15 0,"'
"" OA5 05':: 0.1l6 ~70 -.21.00 4.00 1.90 UO 0.74 0.75 0.65 O.~
.'" !l._m o..m tl.5<l 1.2f.l 1.70 O.<,l(l 0.75 O.W OAS 0.48 0..4:'\ 0.31
"". 0_2.' 0.2.' 0._~3 1.00 UO OA5 0.20 O._H OAO O__~7 0_'::6 0,25
95'l O.~_~ O.~.l 0.2_~ 014 055 0.3.'i 0_11 0.0.'i O..l~ 0._~2 0_2.'i 0.2.'i
"" 0.2.~ 0.'::0 0,~2 06.. OA~ O..~I 0.05 (l.O_~ (1..'2 O.2.~ 0_22 0.25

Tables 2 and 3 show (hat the summer recommendation of 5.2 cfs is available 50% of the time for
the month of ~1ay and 10% of lhe time in April and June throughoUl the entire reach. T:Jbles 2
and .3 also show Ihat the wimer recommendation of 1.3 cfs is only available I t;} of the time in the
month of .\larch throughout the entire reach. Based on the above water availability analysis :Jnd
the requirement of the CWeB sl:JIT to balance the needs of mankind with a reasonable