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
175. 00 000 11 J75 .00 .000 11.
180 00 .000 11. 380. .00 .000 7.
1." 00 000 11 385. .00 000 5.
1'" 00 000 11. 39<l. 00 000 3.
I". .00 000 10. ,,,. 00 000 1.

TOTAL ?REelP, .. ].12 (l-tO..R RAIN.. 2.70) EXECESS PRECIP. .. 1.675 ItfCt€S
VQ.LK Of EXCESS PRECIP.. 9. ACRE-FEET
POl 0" 40. CFS mE Of PfAK" 70, H1N.
IHFILT.-J.OOIN/lft. DECAY-.OOlSO FNINF- ,SOIN/lft.
1W:.Pt:RV,RET,-,40IN. 11A.X.II'F.RET.-.IDIN.

!tATlow. FattLA C . .54
1- I.JIHOH/tO.Jl:
A" 62.1 ACRES
0- 43.CFS
u a.F.C.D. CUI' Rl.f(w:F ANAlYSIS EXECUTED CtI CATE AT TIME

QJfl(/PC 'if:RS1Ctl lOHFIED IN JA/fJARY 1985

PRINT 1J'T1()t JrUl8ER SELECTED FCR THIS BASIN IS

BU.ltVll CllOl: lOO.'fR: F~ FIS: 8/25/97 {SHlOOFt3.amadlli&AGC/p0nd3

BASIN!D" P(JI)A

BASIN CCttEN'T: Sl.8CATOKHT ttllOO: SlB.BASINS A &. E OOTF....L1HG TO POll A

NV. Of BASIN lEPCiTH Of BASIN 015T TO COfTROID UflERVIClJS AAE.A SlOPE lMlT lX.P.Anc.
<S/J1(} 'HI> (1m (PeT) (FT/FT) (HIN)

.OJ

.3'1

.11

50.00

,0271

5.00

aIFFICIENT COCFFICIEHT
(REFLEalt<<i TltE. TO PEAK) (RELATED TO PEAK RATE Of Rlt()Ffl

088 .376

CAlClUTEO llm IiYtlJtOOWlH

Tit'( TO PEAA WE Of WtCENTRATICtI PEAK RATE Of Rl..NJ"F I..m H'l'MOOWH PEAK va..lK Cf RlNJ'F
(HIN) (MIH) <(fS/SC)U) (US) CM)

9.47

21.50

2074.75

71.99

1.85

-- NOTE . TII: TII'E. TO PEAA IS CAlOJ.ATEO BASED cw Ttf: Till: Of aKENlRATI~ PROVIOED BY TIt: USER.
REPlACII<<i TIt: (WE CDIPIJT'ED BY ClJf'{) (TP- 6.311

WIDllt o\T 50.. 14. MIN. WIDTH AT 75" B. MIN. KSO".35 K75".45
AAIHF-"Ll lOSSES IHPUT III BAStN OATA

HAX. flERV[()JS RH. .. .35 IN. HAX. IIftRVlllJS RET. .10 IN.
INfllTllATH~ .. 3.00 IN./!oR. DECAY" 001BO/SteOO FNINFl".5O IN./!oR.

TiM[ l.N1T WE l.N1T T1Hf l.N1T
"",.'....I'H HY""""," HY"""","
, , 10. ". 40 10.
5. 43. 15. 15. '5. 7.
10. 71. JO I'. 50 o.
15 49 35. 14. o. O.
SASIN:O: '00' .. BASINCIJK:NT SLeCATCItlENT NO.IOO: SLe-BASINS A & E MFN.lING TO P(J(l A
........ 5T()l11'(L" DATE 00 REl"I.RN PERlOO .. 100Y[AR
iNCREMENT TOTAl STOl>t INCREMENT TOT-"L STOl>t
T1'" RAINFAll EXCESS HYllRtXlW'H T1'" RAINFAll EXCESS HY"""","
iI1IN.J <IN) PRECIP (CFSJ (MIN.) (IN) PREC!P (CFSJ
D. DO .000 0 70. .05 .031 30.
5 OJ 000 o. 75. .05 .032 I!.
10. .08 004 o. .0 .03 .015 15.
15 11 059 3. 85 ." .015 11.
20. 11 103 9 '" 03 015 9.
25. 38 149 11. " 03 015 7. .
30 58 632 52. 100 " 015 ..
05 38 "5 " 105. 03 .015 5.
40 .11 ". " 110 03 015 4. .
45 " 141 51. 115. 03 015 4.
50 " 110 58. 120. " .015 4.
55 11 "" 50. 125. .00 .000 4. .
;0 .11 "" 43 130. 00 .000 ,. .
65 11 084 37 135. .00 .000 ,.

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