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...)

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PIUlf tlIEB( (cont.) SIJlH flII( PIEIl.E tlIEB(
FloodingSall"Ce l~r Flooq,lafn Data FllllXloio\Y Data FloodingSoorce l00..}ear Fl"",*>l aln Data Fl~ Data
FllllXloio\Y lItdth 3 Fl~ lItdth 3
l00..}ear Thalweg Flood 19loc1ti FllllXloio\Y l~r Thal""9 Flood velociif FllllXloio\Y
ldentificat;oo Statfool D1 scharge El evatlon Elevatioo Fl"",*>lain Left Rl!11t Total Vel.4 EleYatfon ldentificatioo Stationl Dischal'1lE! Elevation Elevation Fl"",*>lain Left Rl!tlt Total 191.4 Elevatloo
(efs) (HSL) (MSl) lItdth (ft) (fps) (feet) (feet) (feet) 1fE!l (MSl) (efs) (MSl) (MSll lItdth (ft) (fps) (feet) (feet) (feet) 1fE!l (MSl)
26&tfi() lmD 52m.0 5264.1 100 8.6 30 30 60 9.6 5264.1 Coof. Preble 1+00 2060 5095.0 5100.0 400 4.8 20 130 1!ll 3.8 5100.7
Dim 270+40 lmD 5273.6 5274.7 43D 4.2 140 130 270 4.1 5275.2 7+00 2060 5103.2 5107.1 18J 8.1 70 60 130 8.3 5107.1
273+!ll lmD 5274.0 5276.8 89D* 3.3 70 90 100 3.7 5277.0 11+40 2060 5110.0 5113.5 4Otl** 3.7 85 105 190 4.3 5113.8
16Ot11 Ave. 273+90 lmD 5275.8 5277.7 925* 6.1 90 8J 170 6.5 5277.7 17+10 2060 5116.0 5120.0 340** 6.5 90 70 1m 6.6 5120.3
01In 274+50 ImD 5287.2 5287.6 111:6 3.7 640 8J 720 4.3 5287 .6 22+30 2060 5123.1 5126.5 29D** 4.4 70 60 130 5.2 5126.9
28l+!ll 12!ll 5287.5 5289.3 570" 1.7 110 2&:l 370 2.0 5289.8 27+30 2060 5131.2 5133.2 460** 6.2 90 100 190 7.3 5133.3
287+!ll 12!ll 5296.0 5297.4 410 6.6 !ll 1!ll 200 6.8 5297.3 3O+9D 2060 5135.5 5138.9 160** 6.0 20 8J 100 6.2 5139.3
295+55 12!ll 5309.0 5310.7 170 6.2 40 !ll 90 7.1 5311.0 IWY 7 32+20 2060 5136.0 5142.8 550** 2.2 !ll 100 l!ll 2.6 5142.8
301+35 12!ll 5318.8 5321.2 230 6.6 40 60 100 7.8 5321.2 37+70 2060 5131. 9 5144.0 170** 7.4 90 40 130 8.1 5144.0
305t1l5 12!ll 5329.6 5330.3 490 5.1 140 !ll 190 5.9 5330.6 Dim 38+30 2060 5153.1 5153.2 1170** 4.0 740 140 !Bl 4.4 5153.5
461-70 2060 5150.0 5154.2 640** 1.1 120 D:l 420 1.4 5154.7
52+30 2060 5153.0 5156.8 440** 5.6 220 40 260 6.8 5157.0
NotEs: 1. Di stance fran eonfl """'" along ehamel ref.......,. 11... Washi ngton St. 52+!ll 1610 5154.0 5159.0 128J 1.4 230 20 2!ll 7.2 5159.0
2. Jol!an veloci~ in ehamel. 5Ji<j() 1610 5154.2 5159.0 640 1.8 2&:l 00 320 2.2 5159.0
3. Fran ehamel reference 11.. looking _stream. fj)+4IJ 1610 5158.5 51m.6 200 6.5 60 100 1m 6.9 5160.6
4. Mean veloc1t;y in fltlllOolY. Bull CaMl 65+40 1610 5165.2 5167.5 43D 2.9 1!ll 100 2!ll 3.6 5167 .8
70+1:6 1610 5169.5 5171.5 320 4.3 90 70 1m 5.0 5171.7
* Fl"",*>lain width iocludes area of hYdraulically discomected fl"". 1-25 72+85 1140 5172.5 5183.1 1170 0.2 390 4!ll 84D 0.2 5184.1
** Fl"",*>lain width <Des!!l! include area of hydraulically disconnected fl"". 79+00 1140 518J.5 5183.1 510 1.7 160 1!ll 310 1.2 5184.1
84+!ll 720 5188.0 5189.0 3!ll 4.1 18J 30 210 4.3 5189.3
90+20 720 5193.5 5195.8 2!ll 3.3 m 40 100 3.8 5196.0
95t!i1l 720 5199.2 5200.7 230 4.1 45 65 110 5.1 5200.9
103+55 720 5209.2 5211.0 310 3.7 8J 30 110 4.3 5211.3
109+-30 720 5217.0 5218.1 2&:l 4.5 35 35 70 6.0 5218.2
Notes : 1. Distance fran eonfl"""", along ehamel ref.......,. 11...
2. Jol!an velocit;y in chamel.
3. Fran ehamel reference 11ne looking _stream.
4. Jol!an velocit;y in fllllXloio\Y.
* Fl"",*>lain width includes area of hYdrau11cally dlscon.-cted fl"".
*' Fl"",*>lain width <Des not fnclude area of hycrau11cally dlseonnected fl"".

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