FLOOD02246

• County: Boulder
• Community: Boulder
• Stream Name: Bullhead Gulch
• Basin: South Platte
• Title: Bullhead Gulch Hydrology Report
• Date: 8/22/1997
• Prepared For: FEMA
• Prepared By: Taggart Engineering Associates, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

August 25, 1997 BHIOOFI3.CHO
so !I 06S t47. LSO ,00 .000 9,
6S !I .065 LJa 155. 00 .000 7.
10. OS 012 L26 LSO .00 000 S,
IS OS 012 !l2 165. 00 .000 ..
80 03 OOS 98 170. .00 000 J.
as OJ OOS 86 175. .00 000 2.

I

I

I

BASIN CCtKNT: SLE8ASIN 10- 15

I

TOTAL PRECIP. .. J,IZ (l.1(lR RAIN.. 2.70) [X[CESS PRECIP. .. Ull IttOt:S
'.'O..LK ~ EXCESS PRfCIP .. 15. ACRE-FEET
PEAl Q" 165. CfS TUE Cf PEAK" 45. MIN.
l".tLT..4.43IN/~ DECAY.. .00180 fNINf" .6(lIN/~
tw,PERV,RET." ,40 IN. IW.IMP.RH.'" .10 IN,
U.O.F.C.D. Q.tP RlJr(fF AHH..YSIS EXEOJTEO ~ CATE AT TUE

C1..tFE/PC 'lERSIll4 ItXlIFlED (N JNl.JAAv 1985
I PRINT CPTIlJI PUllER SElECTED f(JI. l'HIS BASIN [S
lIl1.l.tOi) G1.0i: IOQ-YR: fE~ F1S: 8/25/97 (BHIOOFIJ.OHlalkli&AGC/p0nd3

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BASIN ID: 15

AREA CE BASIN WeiTH Cf BASIN OIST TO CENTROID UPERYIClJS Nl[A Sl(l)E litH Il.RATla.
(SCJtI) (HI) (HIl (pen (fT/FT) (HIN)

S.OO

I

.19 .84
C((FFICIEHT
(REFlECTING mE TO P[M.)

C(lFFICIENT
(RELATED TO PEAK RATE Cf RlHHl

I

,32

7,00

.0210

.137 .232

CALClI.ATED lNIT HYMCGRAPH
Tit'( TO PEN:. PEAA RATE Cf RlHlFF "m IfYOROOW' PEAK nLtE Cf Rl..K.fF
('UN) (CfS/S{JoIII <CFS> (~)

I

12.91 856.62

wtorn AT 50" 35. I1IN.

152.48

9.49

WIDTH AT 75" 18. HIN. KSO" .22 K75" .30

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RAINfAlL LOSSES INPIIT WI BASIN DATA

MAX. PERYIOJS RET. - .40 IN. I'W. IJtlERVIClJS RET. .10 IN.
INFllTRATH)1 - 4.50 IN.lIoR. DECAY - .OOI80/SECCHl FNINFl - .60 IN./IoR.

I

TlHE el'"
HY_
O. O.
S. 73.
LO. 143.
LS. 149.
20. 125.
zs. 113.
30. 103.
35. 90.
40. 77.
45 67
BASIN!O' LS

I

I

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-**STffiHNO. ..

Wl l.HT
HY_

TIll IJUT
HY!JROOW>H

50. 59.
55. 52.
60. 46
65. 41.
70. 36.
75. 32.
80. 28.
SS. 24.
90. 22.
95. 19.
BASINCCIttENT:

LOO
L05
110.
lIS.
120.
125.
130.
135.
O.
o.
Sl28ASIN 10- 15

17.
LS.
lJ.
11.
10.
,
8.
o.
O.
o.

DATE Ill. R[TLRN PERIOO .. 100YEAA

IHCREI'IENT TOTAl ST"," I~EHEHT TOTAl IT","
I TlHE RAINFAlL EXCESS HYORCGI!APH TlHE RAINFALL EXCESS HY"'ffiRAl>H
O'lIN.) (IN) PRECIP (CFS) (HIN.) ClN) PRECIP (CF$)
0 00 000 0 95. .OJ .002 72.
I I. OJ 000 o. 100. ,OJ 002 64.
10 os .001 O. IDS. .OJ 002 57.
15. .12 .oos 1 IlO. .OJ 002 so.
20 12 .014 2 115. .OJ .002 45.
21 38 040 6 120. OJ .002 40.
JO 58 611 54 LIS 00 000 3S
I 35 38 J2L I ~ 9 130. 00 .000 31.
40 12 163 Lsa LJS 00 .000 27.
4S 17 117 L6J [40 00 000 "
,0. 14 OS6 162 145. 00 000 21.
55. lL 060 !59 LSO 00 000 19
I 60 :1 .061 151. 155 00 .000 16,
65. :1 061 143. 160 .00 000 10,
/0. os .007 132. 16S 00 000 7.
IS. os .007 11B. 170 00 000 S,
so. OJ .002 104. 175. .00 000 J.
85. OJ .002 93. IBO. .00 .000 2.
I 10