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Last modified
1/26/2010 10:07:06 AM
Creation date
10/5/2006 3:58:37 AM
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Template:
Floodplain Documents
County
Gilpin
Community
Black Hawk
Basin
South Platte
Title
1998 Black Hawk Flood
Date
9/8/1998
Prepared For
Clear Creek County
Prepared By
Consultants
Floodplain - Doc Type
Flood Documentation Report
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<br />- <br /> <br />- <br /> <br />- <br /> <br />.. <br /> <br />.. <br /> <br />....--.. <br /> <br />- - <br /> <br />------- <br /> <br />Table I Time of Concentration Calculations <br /> <br />Basin Area Overland Flow Channel tc tc tc <br /> Elevation Length Slope C5 tc(OF) Elevation Length Slope Avg. Vel. tc(CH) (check) (OF+CH) (Final) <br /> (ac) VIS DIS (ft) (%) (min) U/S DIS (ft) (%) (fils) (min) (min) (min) (min) <br />Bl 68.5 8720 8690 500 6 0.47 14 8690 8080 2550 23.9 7.4 6 27 20 20 <br />B2 13.6 8510 8440 250 28 0.47 6 8440 8140 700 42.9 4.9 2 15 8 10 <br />B3 25.1 8690 8640 250 20 0.47 7 8640 8120 1510 34.4 5.9 4 20 II 11 <br />B4 7.5 8690 8640 250 20 0.47 7 8640 8150 1450 33.8 3.9 6 19 13 13 <br />B5 4.4 8630 8550 250 32 0.47 6 8550 8170 1030 36.9 3.5 5 17 11 11 <br />B6 3.3 8530 8460 250 28 0.47 6 8460 8110 730 47.9 3.7 3 15 9 10 <br />01 5.3 8650 8570 250 32 0.47 6 8570 8200 920 40.2 3.9 4 17 10 10 <br />02 12.9 8690 8650 250 16 0.47 7 8650 8200 1150 39.1 5.1 4 18 11 11 <br />OJ 61.0 8870 8720 500 30 0.47 8 8720 8230 2110 23.2 7.6 5 25 13 13 <br />
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