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 BHI00FI3.CHO

RATllllAl FCJ1H..lA C .. lJ
1 .. 5.6 INQ€S/tIU
A- IJ.4ACRES
Q" 55. CFS
U.D.F ,C,O OW RUIOFF ANPLYSIS EXECUTED ()I DATE

AT TIME

ClHPt:/PC ~[RS1CJI1'OlIFIEO IN IN<<JAAY 1965

~INT OPHC>>I NltBER SELECTED fCR nus BASIN IS 1
8l1.lHEAO lll.Qi; lOO.YR: FE~ FIS; 8125/97 {BHI00FlJ.OllladlN.tliC/poodJ

BASIN 10: POOA2 .. BASIN (()'IOtT: SLBCArOfllNT NO.I02: Sl8.BASIN C2 OOTFAlLlIG TO P(HJ A2

AAEA CF IIASIN LENGl1i CF BASIN DIST TO CENTROID UftRVI()JS Nl[A SUPE LInT IX&TICII
(S()I1l (Mil (l1Il (PeT) CFT/IT) (HIN)

.01

.07

5.00

50.00

.0319

.14

COEFFICIENT CClFFICIEHT
(REFLECTING mE TO P[AI:;) (RELATED TO PEAl RATE CF RlIiCfF)

~ .~7
OLo.uTED L.HT tf'ftRl:SWlH

TIt'{ TO PEAK WE (J' CCJrICl:HTRATICII PEAK RATE (J' RtIO'F LNIT H'fMOORAPH PEAK nlK a: RlJO'F
(HIN) (HIN) (CfS/S()tll {as> (AF)

'.68

14.10

.38

2731.27

19.61

- MJTE : M T1HE TO ~ IS CAlCIJ..ATED BASED tlI TlE mE CF ctHCEHTRATlCW PROVIDED BY THE USER,
REPlACING TtE CHE CCtFUTED BY 0JfI0 (Tp. J.BlJ

W(OTli AT 50" 11. HIN, WIDTH AT 75" 6. "'IN. K.5O".35 K75" .45

RAINFALL LOSSES INPUT WI BASIN DArA

IW. PERVICtlS REf. .. _35 IN. HAX. HftRYICJJS RET. .10 IN.
IHfIlTAATICII .. 3.00 IN./tfl:. DECAY" .OOlBO/SECCHJ FNINFL".5O IN. 11ft.

TII'E ,"IT 7lI'E '"IT TlI'E '"IT
HYlIllOGlW'li HY_ HY_
O. o. 15. 10. 30. 8.
5. 18. 20 9 35 0
10. 15. IS. 8. O. 0
BASINID: P<ID\2 .. BASIN CQ11EHT: Sl8CATQf'ENT 1().10Z; SIJI.8AS!H CZ ClJTF.6LLlNG TO PO() ~
-"STfllHl<<J.- 1 .-. OATECJlRETlRHPERIOO-lOOYEAR
INCRf~NT TOTAl IT"'" INCREHENT TOTAl 5T"'" .
TII'E RAINFAll EXCESS HY_ TII'E RAINf,6J.L EXCESS HYlIllOGlW'li .
(HIN,) (IN) PREeIP (CFS) 01[M.) {iN) PRECIP (CfSl
o. .00 .000 0 '5 17 141 17.
5. .03 .000 0 50. 14 1I0 16.
10. .08 .004 o. 55. 1I 084 14.
15. .11 059 1. 60. .1I 084 9.
20 11 103 J. 55 it 084 7.
15. .38 .249 7 70. os 031 5.
30. .68 .631 16. 75. .os 031 4. .
35. 38 .345 19. 80. .03 015 J.
40. 11 188 18. 85 .03 015 ,.

TOTAl PREel?" 3.12 (l.t<<.RRAIN" 2"0) EXECESS PREelP. -2.285 INCtf:S
va..LK CF EXCESS PREClP .. 1. ACRE.FEET
PEN: Q" 19. CFS TlHE fF PEAK" 35. MIN.
lNFILL-J.OOIN/1f!. OCCAY",OOI80 FNIHf- 50IN/Ifl
MAX_PERV.RH...J5IN. f'IAX.lfolP,RH.-.lOIN.

AATl()W. rmnA C .. 73
1- 5.JINCHESifQJl.
A- 4.5ACRf:S
Q- 21. CFS
U.O.F .C.D. ClW RtJ()FF AIoIAi.'fSlS EXECUTED {)t JATE AT TlHE

ClJflE/PC VERS[()t !'OJ[FIEO IN JAIflWl.V 1985

PRINT OPTlIJ4 rt..tmR SELEtrEO FCJt rnIS BASIN IS

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