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
0 00 000 0 10 ,05 .027 88.
, OJ 000 o. " .05 .02'7 62,
10. 08 OOJ 1 " OJ .012 42.
" !1 04) 1J " OJ .012 2',
10 22 082 " .. .OJ ,012 2'. .
" Ja .188 130. " .OJ .012 19.
30 68 .628 Ja) laD. OJ .012 18.
05 Ja 040 '68 105. OJ .IHZ 17 .
'0. 22 183 J88. 110 OJ .012 16. .
45 17 .137 /98, US. OJ .012 16,
so. 14 .105 229, 120. ,OJ .012 16.
55. .11 .079 175. 12'5. .00 .000 11.
"'. 11 .080 142. 130. ,00 .000 6,
65. 11 .080 124. 105. .00 .000 "
TOTAl PAEcrp. .. 3.12 (HIl.R RAIN.. 2.71)) EX(CESSmCIP. .. 2.118 INOf'5
YClLK (F €XCESS PRECIP" 19, ACRE . HIT
PEAl Q . 468. CFS HP4E (F PEN:: .. 35.HIH.
1/lFllT.- 3.27 [N/lR [tCAY-.OOlaD FNINf. .5ZIN/I-R
MoU.PERY.RH.'" .40 IN. .....x.IMP.RET.- .10 IN.
U.D.F.C.D. C1.H' RL.MJF AM,.Y5IS EXECUTED CW DATE AT ruE

ClJIlf:JPC VERSICfi f1J)IFIED IN JAMIARY 1985
PRINT CfTI(JI frl.teER SElECTED FCM THIS BASIN IS
8tJ.lt€AO G..lOt; lOO-'fR; FDM f15: 8/25/97 (BHIODfI3.0t1)~/p0nd3

BASIN 10: 62

.. BASIN COt€HT: SLe8ASIH ID- 62

AREA (F BASIN lE/'IGTll (F BASIH OIST TO CENTROID IHPERYIl.lJS MEA Sl(Jl( !.NIT ll.RATUJI
(S(JoII) (MIl (HI> (PCf) (FT/FTl (HIN)

.IJ

.61

2.00

.J<)

.0140

5,00

COEFFICIENT CCHfICIEHT
(R[FlECfING Tip.( TO PEAK) (RELATED TO PEAK RATE (F RlNf"F)
.156 .247

CAlCtlATED LInT H't'[)IlOOlAPH

TIlE TO P{N:. ruE tF CCltCENTRATI()t PEAK PATE tF RU(fF aUT If'([lR(GWlH PEAK Ya..lI€ (f RlHFF
OUN) nUN) <CfSJS()tD CCFS) CM)

7,76

28.00

1800.20

239.43

7,09

... Jr()TE : THE ruE TO PEAK IS CJLQJ..ATEO BASED Cfi THE TtHE Cf CCJrI(fJITRAT!Cfi PROYlDED 8Y 'M USER.
REPlACING THE ~E C(}IPUl"EO BY Cl.IlPO (Tp. 15.55)

"IDTH AT 50" 17. MIN. WIDTH AT 75 - 9. !'tIH. K50" .2B K15 - .38

RAINfALL LOSSES INPUT wI BASIN OATA

I'W:. PERVH)JS AH. .. .40 IH. MAX. IHPERVlOOS RET. .10 IN.
INflL~RAnLM .. .J..J5 :N./Hl. DECAY - .00180/SECOO FNINFL" .60IN./HI..

T1" r....rr T1" LOIT T1" LOIT
HYfJI!OOW>H HYfJI!OOW>H HYOAOGRAPH
0 25 88. so. 21.
5 199 30. 66. 55, 16.
10 223. 35. so 60. 12,
15 163 40. J7. 65. 9,
20 118. 45, 28. 70, a.
BASIHiD: 62 . BASIHC(H1EHT: SIJl8ASINro-62
""STCIlH'(l.. 1 - ClATE MRET~?ERrOO -lOOYEAR
INGlDlNT TOTAL 51"," [t<<;RfI'tEHT TOT.. 51ClOl
T1" RArNfALL EXCESS HY""",^", T1Hf RAINFALL EXCESS HYOAOGRAi'H .
(!'tIN.) rlN) PRrCI? (CF51 UWLl (IN) PREC1? (CFS)
,j JO 000 0 so. 11 068 lI8.
S " 000 o. 55 11 069 104.
la, 18 000 a. 70. .05 .oos 83.
:s 12 .002 I. 75. OS .005 63,
20 22 004 I. 80. OJ .001 47
25. Ja 02' 6. " OJ .001 os.
JO 68 "'. 121. 90. .OJ .001 27.
05. Ja '19 204 " OJ .001 16.

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