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

TOTAl PRECIP. .. J.tZ (Hfl.A ~IH" 2.70J EX(C[SS PREClP. .. 1.508 (HOES
vtlLK ~ EXCESS PftfCIP" 6. ACRE-FEET
P(AA Q.. 109. CFS TIlE IF PEAK." 40. MIN.
IHFILr.-4.50 [N/liI: DECAY- .00180 fNINF.. 60 [N/~
HAX,PERV,RET .. ,"0 IN. 'W:.llfl.RET." 10 IN.

AATHJw. F\JlIUA C .. .48
/- 4,6[HCK:S/~
A" 46.1 ACRES
Q" 102. CFS
U,Q,F C,O. Cl.H' RUaF AHAlvS!S [XEOJTEO ()I DATE AT WE

C1.H'E/PC VERS[()f l..llfFfED IN JNlJAAY 1965

PRINT<J'T1()j M..H8ER SELECTED FM nus BASIN IS

8lJ.ll-f:AO GlJ.0i; IOQ-YR; FEM FIS; 61Z5/97 (BHIOOFIJ,CHlJd<kIi&.4bC/pondJ

BASIH!D: 64

.. BASIN CD'KHT: SLe&ASIH 10- 64

AREA IF BASIH lEMiTH ()= BASIN DIST TO C[NTJlJJID I~ERYICllS AAEA Sl(Jl[ LNIT IX..AATIOt
<S()Ifl (Mil (HI) (PCTl (fT/FT) (HIN)

17

58

18

13.03

.0200

5.00

CCEFFlCIEIfT CCEFFICIEIfT
(REfLECTIMi Tnt: TO PEAK) (RUATEO TO PEAK RATE lJ" Rl.Jr(ff)
,121 .225

C'LQU.TEO \JUT H\'ClAOOWlH

WE TO PEAK PEM RATE IF Rl.Jr(FF IJm H'fIlR(GW PEAK VQLK IF RlJrC.fF
(HIN) {CFS/S(JtD (CFSl (,I,f)

8.16

1376.90

238.20

9.23

WIDTH AT 50 .. 2Z.HIN. WIDTH AT 75.. II. IUN. <50- ." (75- .33
RAINfAll LOSSES INPUT WI BASIN DATA
Ii'.X. ~RVICUS REf. .. .40 IN. IW. Uf>ERYIClJS RET. .10IN.
lNFIlTRATICW '" 4.50 !N.lt1l:. DECAY'" .OOI801$ECOO FNINfl'" .60 IN.llft
71" \.NIT 71" \.NIT 71" \.NIT
HY1lROOW'H HY1lROOW'H HY1lROOW'H
O. O. 35. 78. 70. 17.
5. 177 40. 63 75. 14.
10. 134. 45. 51. so. 11.
15. 183 50. 41 85 9.
10 154. 55. 33. 90. O.
15. 12l. ... 17. o. O.
30. 97 65. II. O. o.
BASIN 10: 64 BASINCCttOT: SlBBASlN 10- 64
.""STCIlJ1NO.- DArt CR RHLRN PERIOO .. l(}QY[AA
[tfCR[MENT TOTAl 57"'" INCREMENT TOTAL 5T"'"
71" RAINFAll EXCESS HYlJlOOW>H 71" RAINFAll EXCESS HYIlRCGW'It
(I1[N.) (IN) PJlECIP (CFS) (11IN.l (IN) PREC!P (CfS>
o. .00 .000 O. 75 05 .010 106. .
5. 03 .000 0 80 .03 .004 B7.
10. .08 .001 o. 85 03 004 71
t5. .11 015 3. 90. 03 004 58.
20. 11 .027 9. 95. 03 .004 48.
15. 38 .061 10 100. .03 .004 40.
30 ... .613 130. 105. .03 004 33.
35. 38 .324 218. 110. .03 .004 17. .
40. 11 .166 23l. 115. .03 .004 18.
45 17 .120 225. 120. .03 .004 14.
50. 14 .089 2G7. 125. .00 .000 10.
55 11 063 185 130. .00 .000 7. .
iO 11 063 166. 135 .00 .000 5. .
65. 11 063 151 140. .00 .000 ..
70 .05 010 129. 145 00 .000 3.
TOTAlPRECIP. .. 3.12 (1.~RAIN" 2.70> EXECESSPRECIP. -1.661 INCHES
V(lLHE Of EXCESS PREC!P" 15. AOlE.fEET
PEA,( Q- 2Jl.CfS TlHE Of PEAIC.- 40.H1N.
INFILT,"4.50[N/ftt DECAY".OOI80 FNINF.. .50IN/ftt
MX.PERV,RET...<W IN. AAX.IPI',RET," lOIN
lJ.O.F.G.D. ClJfl RlNOfF ~YSIS EXEOJTEOIJtOATE ATTIHE

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