2010-11-12_PERMIT FILE - C1981010A ‎(11)‎

• Permit No: C1981010A
• IBM Index Class Name: Permit File
• Doc Date: 11/12/2010
• Doc Name: page 4-172 to 4-222z
• Section_Exhibit Name: 4.8 Hydrologic Impacts
• Media Type: D
• Archive: Yes

L

Table 4.8-5 Estimated peak flow from spoils with slopes ranging frun 8% to 14% using various 10-acre configurations;
2-year, 24-hour event.
?m
C
M
0
T
M
W
c
i
m
Drainage Drainage slope Equivalent Area Equivalent Actual
Ikngth Width Slope Adjustment Area (1) Shape (2) Qirve Peak Peak
(ft) (ft) (9') 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 .% 21.70 0.46 87 8.% 3.%
1980 220 10 .96 42.74 0.23 87 15.68 3.46
2640 165 10 .% 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 = (11209) 1'67, vhere 1 = drainmge length.
(2) Actual Area/Equivalent Area
iWjb 11/86