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

AAHlJrW. FCRUA C - 62
I . . 1 lNO€S/tO.R
A - SJ 8 ACRES
0- 131, CFS
lJ.D F.C 0 CLHP RlJ()FF <l.NAlYSIS DECUTED CfI DATE

I a.HPE/?( VERSICN f'OJlFIED IN JAIlJARY t985

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August 25,1997 BHIOOFI3.CHO

Af H"'f:

PRINTCfH~I<<.ItlERSELECTEOF~THISBASIN IS
8llLlVD lROt: 100.YR: FE* FIS: 8/25/97 (BHI00FI3.0madlHlG:/pond3

BASIN 10: 21

-- BASIN (()tENT: Sl.B8ASIN 10- 21

NlEA lY BASIN LENGTH rY BASIN OIST TO CENTROIO IIflERVIOJS NlEA SlOPE IJIIT DlRATIOt
(S()lll (HIl (HIl (PeT) (FT/FT) (HIN)

.13

.59

15

5,51

.0360

5.00

COEFFICIENT COEFFICIENT
(REFLECTING mE TO PEN.) (RELATED TO PEN. RATE f'$ RlJ(FF)

.143 .227

CALGUTEO IIUT ~

ruE TO PEAl( WE fJ CO<<l:NTlV.T!<W PEAK RATE (J' Rt.N:FF LNIT HftflOOWlH PEAK 'to.LK CF IllNJ'F
(HIN) (HIN) <CFS/S()lD (CFS) (Ii)

1l.74

52.00

942.7.

119.73

"n

*** MJT[ : TlE mt: TO PEAK IS CAlaJ.ATED BASED ~ Tl( WE lJ' COCEHTRATI<W PROYIDED BY TtI: USER.
REPlACING M eN: ((JflUT[D BY C\Jfl{) (TP- 10.08>

WIDTH AT 50 - 32. HIN. WIDTlt AT 75 - 17. "'IN. KSO - .22 .05. .30
RAJNF.4LL LOSSES INPUT WI BASIN OATA

MAX. PERYIOJS RET. - ,40 IH. IW:. IIftRvlCUS RET. .10 IN.
IHFIlTAATIOt - ..50 IH./ffl:. DECAY - .OOI80/SEaJI) FNINfL - .60 IH.lI<<.

TI'" "'IT TI'" "'IT TI'" "'IT
H'IlJ!(GlAPH H'Ill\(Gl,IJ'H HY""",," .
o. o. 40. 54 80 18
5. 65 45. 48. 85. l6.
10. 117. so. 42. 90. 14,
15 llZ. 55 36. 95. 12.
10. 91. 50. 32. 100. 11.
15 86. 65 lB. 105. 9.
30. 75 70. 24. llO. a.
35. 63. 75, 21 115. o.
BASIHIO; 21 I3ASINCCJtf:NT SL.6BASINlD-21
-ST(JlHNO.- DATE ~ ~ PERIOO - looYEAA
lNCROtENT TOTAL 5''''' INCREi'lENT TOTAl 5'''''
'''' RAINFALL EXCESS HYOROOW'!1 TI'" AAINFAll EXCESS HYCO""""
'!'UN.) fIN) f'RECIP (CFS) (HIN) (iN) PRECIP (CFS)
o. 00 000 0 85. 03 .002 64.
5, .03 ,ODD o. 90. 03 .a02 56.
10. 08 .000 o. 95. 03 .a02 49,
15. 12 .007 , 100 .03 .002 43.
10, 22 .011 ,. 105. 03 .002 38.
15. 38 .035 , 110. .03 .a02 33.
30. 68 .610 " 115. 03 .a02 29.
35 .38 .321 98 120. .03 .002 26,
40. .22 163 121. 125. 00 .000 23,
45 .17 117 122. 130 .00 .000 10.
50. 14 .086 123. 135 .00 .000 17.
55 11 059 ll8. 140. 00 .000 10.
50 " 060 !10. 145 00 .000 7.
55 11 060 !03 150 .00 000 5,
70. 05 006 95 155. .00 000 3.
75 05 006 84 160 00 000 2.
eo OJ 002 73. !65 .00 .000 ,.
TOTAl Pflf:cIP. .. 3.12 (l.!il.R RAIN - 2.70) [XECESSPRfCIP. -1.557 lNOES
va..\J'IE (F EXCESS m:CIP. 11. ACRE-FEET
""0- 123.CFS WE rk PEAK - SO.HIN.
fNFILr.-4.S0IN/lfl DECAY. .00180 FNINF- .60!N/!-R
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