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

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August 25, 1997 BH100FI3.CHO

BlLulAll tllCH; lOO.YR: FEW. FIS: 8125/97 (BHlOOFrJ.OilladlMAGC/p0nd3

BASIN [0 56

BASIN CCHENT SL88ASIN [l)oo 56

AAfA OF BASIN LENGTH OF BASIN DIST TO CENTROID II"P(IlvlCUS AA[A SllJ'E lJIlT !).RATU)'
(SIJ1[) (MI> (Mil (PCT) (FT/FT) <HIN)

"

40

12

40,00

ooso

5.00

COEFFICIENT CIIJFICIENT
(Rf:fLECTING TUl( TO PEAK) (RELATED TO PEAK RATE (f" Itl.JO'F)

.093 .370

CAt..Cl1.ATEDl.HITHY~

rut: TO PEAK TIME OF CCWCEHTR,ATHJ. PEN:: MoTE OF RlJ(FF LNIT H'I'tJl:OOW'W PEN( YO.LK OF IIlJO"F
(MIN) (JIliN) (CFS/SI)lIl (CFS) (M)

8.82

22.00

2248.01

227.G5

5.09

-- PfJTE nE TII"E TO PEAK IS CAt..Ol.ATED BASED (Jt nE Tnt: OF ca<<:ENTRATIl)t PROVIDEO BY M USER.
REPlACING M CJtE CClf'UTED BY a.tPD (fp. 8.711

WIDTH AT 50" 13. HIN. WIDTH AT 15.. 7. HIN. KSO".35 (75...45
RAINFALL LOSSES INPUT WI BASIN DATA

~. PERVIClJS E. .. .40 IN. I"AX. UftRYIWS RET. .10 IN.
INFllTAATICJI .. 4.50 IN./~. DECAY. OOlSO/SECQ() RfINFl".6O IN.llft

HI'{ COIT TII'{ COlT TII'{ COIT
HYIJOOOW>H HYIJOOOW>H HYIJOOOW>H
o. O. 20, .., 40. 21.
5, 145. 15. 64. 45. 14.
10. 221. 30, 44. 50. 10.
15, 143. 35. 30. 55. 0,
BASIHIO: 56 .. BASIHC()ftJ(T: SlBBASIN 10- 56
H-** STtR1 t(). .. - !lATE (JI RE11JlN PERIOO .. lGOYEN!.
IHCRH'ENT TOTAl STCA! INCREI"ENT TOTAl STCA! .
HI'{ RAIHfN.l EXCESS """"""" TII'{ RAINFAll EXCESS HYIJOOOW>H
OHN.) (IN) PRECIP (CF$J (HIN.) (IN) PRECIP (CFS) .
.
0, .00 .000 O. 75. 05 .023 $4,
5. OJ .000 O. 80 OJ .012 31.
10. .08 .003 o. 85. OJ 011 16.
15. .12 .047 a 90. .OJ .012 10.
10. .11 .081 13 95 03 011 16.
15. .38 ,153 47 100. 03 .1J12 13, .
30. .68 .621 HI. IOS. .03 .1J12 11.
35. .38 .335 119 llO. ,03 .1J12 11.
40. .11 .178 110 115 03 011 10,
45, 17 .132 180. I21J. .03 011 10.
50 14 .101 15l. 125. .00 000 a.
55 11 .1l75 125. LJO. .00 .1l1l0 5,
60. 11 .075 104 135. 00 000 3,
65. 11 076 90 140. .00 000 1.
70. .OS 013 '3 145. .00 .000 1.
TOTALPRECIP. - J.12 Cl-fO..RAAIN- 2.70) EXfCfSSPRfCIP -2.036 INCHES
va..lJEOFfXCfSSPRECIP- II. ol,(Rf.FEET
,,-,<q- 219.CFS nl"{~PEAK- 35.P1IN.
IHFllT.-4.50 UII~ DECAY" .00180 AHNF .. .601N/tft
*X.PERV.RET.-.4O IN. KU.I""RET.- lOIN.

RATICJW. FllltU.A C - .65
I - 5.0 lNO(S/1UR
A.. 54.5..loCRES
Q" 212. CFS
lJ O,F C,O. ctHP RIJrIOFF NW..VSIS EXECUTED ~ DATE

~T iIHE

Cl.t-ftIPC ~ERSIOH ~IFlED IN J.A.IlJMV 1985
PRINT CPTlCN .'t..KIER SELECTED FCR nlls BASIN IS 7
Bl1.ll-f:AD GllCH: IOO-1R: FEHA FlS: 8125/97 (BHIOOFI3.0l(lac:ldH&.4G:/oondJ

BASINID: 57

BAS IN CCJtIEHT Sl88AS IN I~ 57

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