FLOOD04416

• Designation Number: 304
• County: Adams
• Community: Unincorporated Adams County
• Stream Name: Big Dry Creek, (ADCO), North area tributaries
• Basin: South Platte
• Title: Flood Hazard Area Delineation - Big Dry Creek, ADCO, North Area Tributaries
• Date: 7/1/1989
• Designation Date: 1/1/1990
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE IV-1
FLOOD HAZARD DATA FOR 100-YEAR STORM (CONT...)

IUIUS CAEllC
Fl oodi ng So.rce l00-year Fl"",*>laln Data Fl~OIltd
FlllOd./ay lItdth 3
l00-year Tha1""!l Flood Fl"",*>lain 19lOCitl Floodool,y
Identification StatiO'll Oi schal'1lE! ElevatiO'l E1 evation Left Ri!l1t Total 191.4 Elevation
(efs) (MSl) (MSl) Width (ft) (fps) (feet) (feet) (feet) 1fE!l (MSl)
5+10 1!llD !ll5B.5 In BIg Illy Creek Fl"",*>lafn In BIg Ory Creek Floodool,y
13+25 1!llO !>l66.0 In Big Dry Creek Fl"",*>laln 130 18J 310 0.4 !ll78.5
Dim 17+!ll 1!llD !ll79.9 In Big Dry Creek Fl"",*>lain 120 130 250 4.7 5080.2
22-100 1!llD !ll79.0 !llB2 .1 450 1.7 20 270 29D 1.9 !llB2.6
l.I'I'R 24+55 14m 5080.0 5008.0 1035 0.4 70 140 210 1.3 5008.0
Colorado B11ld. 25+45 14m 5001.6 5008.0 600** 1.1 60 140 200 3.1 5088.0
28+80 14m 5007.5 5009.5 330** 5.3 50 130 18J 4.4 !ll9D.l
33+65 1460 5094.2 !ll97.4 430** 3.0 130 60 190 5.0 !ll97.3
37+20 14m 5096.3 5008.9 640 6.2 240 60 300 0.1 5008.6
16Ot1l Ave 37+90 1370 !ll97.5 5103.0 3!ll 3.1 135 100 235 7.6 5102.9
40+20 1370 5099.0 5103.9 250 2.8 100 90 190 2.3 5104.7
Con. So.fo\n'is 42+25 1370 5100.2 5104.9 18J 4.2 70 !ll 120 8.8 5105.0
Genran Di tch 46tOO 1370 5113.0 5113.7 660 4.3 70 40 110 4.1 5113.7
48i4O !llO 5113.5 5115.3 140 2.4 45 15 60 2.8 5115.4
53+65 !llO 5117 .5 5120.1 45 7.3 15 20 35 8.3 5120.2
59+35 !llO 5126.0 5129.5 65 4.6 30 20 50 4.9 5129.8
66+8J !llO 5138.5 5141.0 220** 5.7 40 35 75 6.9 5141.0
73145 !llO 5149.8 5151.3 270** 2.8 45 75 120 3.7 5151.6
8Ot6O !llO 5153.0 5163.2 310** 4.5 !ll 240 29D 4.5 5163.2
Holly Street 81+m 320 5166.0 5165.7 150'* 1.9 8J 340 420 1.8 5165.7
82+10 320 5166.5 5166.7 500"* 2.5 90 300 390 2.6 5166.7
84+50 320 5171.0 5172.0 200'* 2.2 90 !ll 140 2.9 5172.2
87+40 320 5177 .5 5178.2 58J 2.2 85 425 510 2.2 5178.3
Dim 88+75 320 5193.3 5192.6 110 0.1 670 120 0.1 5192.6

IUIUS am: 5IlIIH
Fl oodi n9 So.rce l00-year Fl"",*>la1n Data Fl~ Data
Floodool,y lItdth 3
l00-)9r Thal""!l Flood 191OCi1;y2 Fl~
Identification StatiO'll Oi schal'1lE! Elevation E1 evati on Floodplain Left R1!tlt Total 191.4 Elevation
(efs) (MSl) (MSl) lItdth (ft) (fps) (feet) (feet) (feet) 1fE!l (Jo\Sl)
Con. W.;lotlrr1 s 0+00 !llO 5100.2 5104.9 18J 4.2 70 50 120 8.8 511:6.0
Gennm Oitch 4-100 !llO 5113.0 5113.7 660 4.1 !ll 40 90 4.1 5113.7
6+65 !llO 5114.5 5116.7 140 4.6 40 70 110 4.1 5116.8
11+90 !llO 5122.0 5124.5 120 4.1 40 30 70 4.1 5124.8
16+75 !llO 5133.0 5135.9 120 6.9 40 30 70 7.4 5135.8
2Otll5 !llO 5141.8 5143.2 230** 3.7 70 20 90 4.2 5143.6
Dim 24+35 !llO 5157 .4 5157.0 11!ll 3.4 !ll !ll 100 5.8 5158.4

Notes :

1. Oistance fron eO'lfluerce along channel reference 11ne.
2. Mean velocil;}' in chan..l.
3. Fran chamel reference 11.. looking __.
4. Mean veioci~ In floodool,y.

*
**

Floodplain width includes area of hydraulically discomected fl...
Floodplain widtll OOes ~ include area of hydrau11eally disconnected fl...

Notes: '

1. Oistance fran conf1uerce along ehamel reference li...
2. Mean veloci~ in channel.
3. Fran channel reference 11.. looking __.
4. Mean velocil;}' in fl~.

*
**

Floodplain width Includes area of hydraulically discomected fl...
Floodplain width 00es not include area of hyO--aulically dlscomected fl...