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 BHlOOFI3.CHO
10. 08 003 .. 90. OJ 012 34,
15. 12 ,4/ 3, 05, .OJ 012 28,
zo. 2Z 08/ 11 100. OJ .Oll 10. .
" l8 153 ". 105. .OJ .011 16.
JO 68 6/l 11. 110. OJ .011 IJ,
35 l8 335 119. US. OJ .12 11.
40 2Z 178 137 !/O OJ .lllZ 10.
45 II 131 !/9 125. 00 ,00' 8,
50. .14 101 116. 130. .00 .000 6.
55 .11 '15 IOJ !35, .00 ,00' 4.
68. 11 '15 9/. 140. .00 .000 3.
66. .11 .076 83. 145. .00 ,000 2.
I' .05 .023 13. 150, .,. ,000 2. .
15. .05 .023 61 155. .00 .000 1. .
TOT,tt PRECIP, .. J.12 (l-I(LR RAIN .. 2.70) EXECESSPRECIP. .. 2.036 lHOES
VQ..tK Cf" EXCESS PRECIP.. 9, ACRE-FEET
"'" Q. 137. CFS TIP'{ fJ PEAK .. 4O.HIN.
rHFILT.- 4.50 [N/I-f{ OECAY" .00180 FNINf. .60IHIIfl.
HA.X.PERV.RH....40JN. Jit..'(.!HP.RET,-.lOIN.

- WARHING : n€ AREA IS TOO SMALL (lESS TlWI 90 ACRES) TO APPl Y nE QHl[),
Ar<<l 1lE A80VE ESTlMTfO PEAK MY Jt'JT BE RJGfT

U.D.F.C.D. Wfl RlIO'F NW.YSIS

E'EClIfED lJIllATf

AT TIME

aH'EtPC YERSIQt PIXIIFIED IN IN<<JAAY 1985

PAINT lJ'TICIt Nl.HI[R SELECTED FCR THIS BASIN IS

BlLlt€AD oo.Ot: lOO-YR; FE~ Frs: 8125197 (BHlOOfIJ.amad6i&NiC/p0nd3

BASIN 10: 52

BASIN CQt(HT: Sl.II8ASIH 10- 52

MEA rY BAS!N lEICiTH Cf" BASIN OIST TO CENTROID IIftRVIWS AA!:A SlCPE LNIT OlRATIlJt
(sam (HI) (H[) (PeT) (FT/rT) (HIN)

19

,85

.so

40.00

.0190

5,00

alJFlCIENT C/XFFICle:NT
(IUJLECTlMi ruE: TO PEAK) (RELATED TO PE.AK RATE Cf" RI.NlFF)
.093 .433

CALGU..Al!D ~IT tfYMCGWH
TIP'{ TO?EN: PEAK RATE Cf" Rl.IO'"F ~IT HY~ PEAK Vll.tK ~ Rl..NFF
(111M) (CFS/S()tIl (CFS) (~)

12_10

1731.11

496.83

15.31

IoIIOTH AT 50 - 17. MIN, WIDTH AT 75 ..

MIN. (50.. 35 K75 - .45

RAIHf~l LOSSES INPUT wI BASIN DATA

MAX. PERVIClIS RfT. - .40 IN. MAX. rHPf:RVIQJS RH .10 IN.
INFILTAATI<J4 - 4.34 IN.llfl.. DECAY.. 00180/SECOO FNINFl - .59IN./lft

nil !.OIT nil !.OIT nil !.OIT
HYrooo!AI'If HYDRCGW'H HYDRCX;lW'Ii
,. 0 30. 165. 60. 25
5. lOB. 35. 121. 55. 19.
10 ~66. 40. 89 70 14
15 450. 45. 65 15. 10
10. 315. so. 48. 80. 7.
15 225. 55. 35 85 o.
BASIN!D: 5/ .. BAS H~ C{Jt(NT: SL..88ASIN 10- 52
....... STIllPt NO. .. DATE ell. RHlRN PERIOO - 100YEN!
ltKRHENT Tar.. 5T"," INCREIlHT TOT.!t. ST","
nil RAINfAll EXCESS HYOROGAAl'I1 nil RAINfAlL EXCESS HYORCGlAPtf
'HIN.) I[N) PREW' (CFS) (H!N.) (IN) PRECIP (CFS) .
.. 00 00. 0, 85. .03 '" 123.
; 03 .000 . 90. .03 '1/ 98.
10. 08 J03 1. 05 ,03 .012 19,
15 11 1147 10. 100 .03 .012 85.
10. /2 .Q8/ 39 105. .OJ .012 54.
/5. " IS<; 90 lID. .03 .012 44.
JO. 58 62/ 242. US. .3 012 ".
35. J8 JJ5 460, 120. .03 012 34.

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