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LA <br />9 <br />ON <br />Table 4.8-5 Estimated peak flow from spoils with slopes ranging frun 8% to 14% using various 10 -acre configurations; <br />2 -year, 24-hour event. <br />Drainage <br />Drainage <br />slope <br />Equivalent <br />Area <br />Equivalent <br />Actual <br />Ikngth <br />Width <br />Slope <br />Adjustment <br />Area (1) <br />Shape (2) <br />Qirve <br />Peak <br />Peak <br />(ft) <br />(ft) <br />(9') <br />Factor <br />(acres) <br />Factor <br />Nunber <br />Flow (cfs) <br />Flow (cfs) <br />660 <br />660 <br />14 <br />.98 <br />6.82 <br />1.47 <br />87 <br />3.58 <br />5.16 <br />1320 <br />330 <br />14 <br />.98 <br />21.70 <br />0.46 <br />87 <br />8.96 <br />4.04 <br />1980 <br />220 <br />14 <br />.98 <br />42.74 <br />0.23 <br />87 <br />15.68 <br />3.53 <br />2640 <br />165 <br />14 <br />.98 <br />69.09 <br />0.14 <br />87 <br />22.40 <br />3.07 <br />660 <br />660 <br />12 <br />.97 <br />6.82 <br />1.47 <br />87 <br />3.58 <br />5.10 <br />1320 <br />330 <br />12 <br />.97 <br />21.70 <br />0.46 <br />87 <br />8.96 <br />4.00 <br />1980 <br />220 <br />12 <br />.97 <br />42.74 <br />0.23 <br />87 <br />15.68 <br />3.50 <br />2640 <br />165 <br />12 <br />.97 <br />69.09 <br />0.14 <br />87 <br />22.40 <br />3.04 <br />660 <br />660 <br />10 <br />.96 <br />6.82 <br />1.47 <br />87 <br />3.58 <br />5.05 <br />1320 <br />330 <br />10 <br />.% <br />21.70 <br />0.46 <br />87 <br />8.% <br />3.% <br />1980 <br />220 <br />10 <br />.96 <br />42.74 <br />0.23 <br />87 <br />15.68 <br />3.46 <br />2640 <br />165 <br />10 <br />.% <br />69.09 <br />0.14 <br />87 <br />22.40 <br />3.01 <br />660 <br />660 <br />8 <br />.92 <br />6.82 <br />1.47 <br />87 <br />3.58 <br />4.84 <br />1320 <br />330 <br />8 <br />.92 <br />21.70 <br />0.46 <br />87 <br />8.96 <br />3.79 <br />1980 <br />220 <br />8 <br />.92 <br />42.74 <br />0.23 <br />87 <br />15.68 <br />3.32 <br />2640 <br />165 <br />8 <br />.92 <br />69.09 <br />0.14 <br />87 <br />22.40 <br />2.89 <br />(1) A = (1/209) 1'67, ohere 1 = drainmge length. <br />(2) Actual Area/Equivalent Area <br />iWjb 11/86 <br />