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 BHIOOFI3.CHO
40 2Z 1'1 106 100 03 .001 10.
45. .17 .tlS 185 105 03 .001 7.
50. 14 "" 161. llD. .03 .001 ..
55. 11 058 138 115 03 .001 3.

TOTAl. PREC1P 3.12 (l.tO.Jl Fl.AIN.. Z.701 [XECfSS PIlECIP. .. 1.509 IN()€S
VCllKCfEXCESSPRf:CIP" 11. ACRE-frET
PEAK Q.. 206. CFS mE ry PEAK.. 40. HIN.
[HFIU." 4.45 [N//fI: DECAY" .00180 FNINf.. .60 [N/lfI.
~X.PERV,RH...40 IN. 1W.IIf'.RfT.- .10 IN.

RA THJW. fClllUA C .. . 48
I" 4.4 IHlXS/!-O.R
A .. as.l ACRES
Q- tal.erS
u.O,r.C.D. C1.HP RlJ(fF ANAlYSIS EXEMED III [}ATE

AT Wt.:

CLJfIE/PC VfRSI(W "IX)IFlED IN JNAJAAV 1985
PRINT ~IIllIUtIER SELECTED FCR nus BASIN IS 7

BU..LtEAO QJ.Qt; lOO-YR; fEtM FrS; 8125/97 (BHIOOfl3.0f1)~/p0nd3

IlASINIO: 6J

BASIN ct:I<<HT: Sl88ASIH 10- 63

NlEA ~ BASIN lE~TH (;f BASIN 015T TO C[NlllOIO ItftRVIOJS AREA Sla>>E lMIT [lRATIClI
(sam (MIl (PtI) (PCT) (fT/n) (HIN)

.07

1.00

.56

.40

,0160

5.00

CC(FFICIENT CCEfFICIEHT
(Rf:FLECTIP<<; TIlE TO PE.fI.) CIlU.ATfD TO PEAK RATE CF RlIIH)

l~ .US

CALC1.1..ATED ~IT H'fmDWlH

mE TO PEAK TIIoI: fY C(JrICEHTR),T1I)t PEAK RATE fY RlKH lMIl ~ PEAK VCltJE CF RlHFF
(HIN) (HUO CCFS/S(JHl <CFS) (M)

7.38

26.00

1768.77

127.35

3.84

.... NOTE; 1lf: WE TO ~ IS OLCl.l..ATED BASED CW M mE {F CtJ<<:[H1'RATItw PROVIDED BY T1E USER.
REPlACIr<<i M CNE COI'llTED 8Y a.H'D (TP- 14.78)

wIDTH AT 50.. 17. HIN. WIDrn AT 7S" 9. /tIN. K50.. .Z6 ,as".35

RAINfAll lOSSES INPIJT '011 BASIN DATA

MAX. PERVlOOS REI. .. .40 IN. Kt.X. IHPf:RVIClJS RfT 10 IN.
INFlLTRATICJrI .. 4.50 !JUHL DECAY" .00180/5ECOO FN1NFl".6O IN.I~.

TlI1f '"17 TlI1f ,"17 TlI1f ,"17
,-, HYORo;JW>H HY_
o. o. 15. 49 50. 13.
5. 110 30. 38. 55. 10
10 lIS. 35. 19 60. 8
15. 87 40. 11 65. o.
10 53 45 17 o. o.
BASIN 10: 63 BASIN'1H1[NT: Sl.88ASINID-63
-.5T~NO." 1 .... !)ATE !]I: RfTl..RN PERlOO .. 100YEAA
INCREMENT TOTAl 5T"'" INCREMENT TOJ"- IT"'"
TIME RAINFAll EXCESS """"""'" TlI1f RAiNfAll EXCESS HY_
(HIN.) (IN) PREC!P (CFSl (HIN.l <IH) ?RECI? (CFS)
o. .00 000 0 50. 11 .058 66.
5. .03 000 o. 65. .11 059 58. .
10. 08 000 o. 70. 05 005 47.
15. 11 .OOZ o. 75. .05 . ODS 36.
10 11 004 ,. 80 .03 001 18.
15 JB 013 3 85 ." 001 11.
30. 68 "9 70 90 03 001 13
35 .38 319 loa 9S " 001 8.
40 11 1'1 109, 100. .03 .001 5.
45 17 115 " 105. .03 001 .
50. .14 .084 87 110. 03 001 1.
55 11 .058 75. US. .03 001 ,.

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