PERMFILE120159

• Permit No: C1981010A
• IBM Index Class Name: Permit File
• Doc Date: 2/15/2006
• Doc Name: page 4-172 to 4-222z
• Section_Exhibit Name: 4.8 Hydrologic Impacts
• Media Type: D
• Archive: Yes

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Table 4.8-5 Estimated peak Elow from spoils with slopes rar~girlg Eton 8% to 14Y, using various lQ-xre configurations;
2-yeaz, 24-hoes event.
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Drautage Drainage Slope Equivalent Area Equivalent Mtua1
Ikngth Width Slope Adjustment Area (1) Shape (2) Quve Peak Peak
(ft) (f[) (%) Factor (acres) Factor Nunber Flow (cfs) Flow (cfs)

660 660 14 .98 6.82 1.47 87 3.58 5.16
1320 330 14 .98 21.70 0.46 87 8.96 4.04
1980 220 14 .98 42.74 0.23 87 15.68 3.53
2640 165 14 .98 69.09 0.14 87 22.40 3.07
660 660 12 .97 6.82 1.47 87 3.58 5.10
1320 330 12 .97 21.70 0.46 87 8.96 4.00
1980 220 12 .97 42.74 0.23 87 15.68 3.50
2640 165 12 .97 69.09 0.14 87 22.40 3.04
660 660 10 .96 6.82 1.47 87 3.58 5.05
1320 330 10 .96 21.70 0.46 87 8.96 3.96
1980 220 10 .96 42.74 0.23 87 15.68 3.46
2640 165 10 .96 69.09 0.14 87 22.40 3.01
660 660 8 .92 6.82 1.47 87 3.58 4.84
1320 330 8 .92 21.70 0.46 87 8.96 3.79
1980 220 8 .92 42.74 0.23 87 15.68 3.32
2640 165 8 .92 69.09 0.14 87 22.40 2.89
(1) A = (l/209) 1'67, ohere 1 = drain~e length.
(2) Actual Area/Equivalent Area
.T1M1/ jb 11 /86