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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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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 />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Table 5 Street Capacity Calculations <br /> <br /> Minor Storm . Major Storm -6"deep <br />Street Theoretical Reduction Street Theoretical Reduction Street <br />Slope Capacity Factor Capacity Capacity Factor Capacity <br />(%) (cfs) (cfs) (cfs) (cfs) <br />I 3.3 0.80 2.6 25 0.80 20 <br />2 4.6 0.80 3.7 36 0.70 25 <br />3 5.7 0.72 4.1 44 0.60 26 <br />4 6.5 0.63 4.1 50 0.50 25 <br />5 7.3 0.51 3.7 56 0.43 24 <br />6 8 0.42 3.4 62 0.37 23 <br />7 8.6 0.35 3.0 67 0.32 21 <br />8 9.2 0.28 2.6 71 0.27 19 <br />9 9.8 0.24 2.4 76 0.23 17 <br />10 10.3 0.21 2.2 80 0.21 17 <br /> <br />Street 2% cross slope uphill, 2% on downhill side 5/29/98 <br />Minor storm capacity on uphill side of street only. <br />
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