PERMFILE66875

• Permit No: C1981016
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Sedimentation Control & Diversion Structure Calculations
• Section_Exhibit Name: APPENDIX XXI to Section XXI.8
• Media Type: D
• Archive: No

~_ E EP.OSION CALCULATIONS
S
I
• Project: EAST MINE
Areas Land
of use or
Project Cond.
•
•
Est. Est.
Soil Acres Soil Loss
Universal Soil-Loss Equation Factors Loss in from Area
R K L S LS C P T/Ac/Yr Araa Tnna/Yr
u6_ -

21/ Station
P
d
40 ~~ 022
1
'
'
on .
5 280
21% 8 1 1 8
1.08 51.84
52T/yr x 2,000 #/T = 1,040 cu. ft/ r 1,040 cu.ft/yr + ,024 Acre foot/yr
y
100 #/cu. ft
43,560 sq.ft/AF
.024 Acre foot/yr
= 0.22 Acre foot/yr/acre ~ L .035 Acre foot/Acre/yr
1.08 Acre
USE .035 Acre foot/Acre
Shrubs east
005
6A of new sub 40 .15 340" 22% 11 .15 1 9.9' .50 4.95
Above fan
66 & old sub. 40 15 200" 30°~ 12 1 1 72.0.033
. .94 67.68
Slope abov
3 highway q0 .15 105" 48% 18 .15 1 16.2'007 .50 8.10
ope
below
'006
3A highway 40 .15 55' 55% 14 .15 1 12.6 49 6.17
Water
36 Tank 40 .15 150' 20% 5.3 .15 1 4.8'002 .29 1.39
Mine
6C Yard q0 .15 450' 8% 2.1 1 1 12.6.006 1.50 18.90
t4i ne
006
3C Yard 40 .15 450' 8% Z.1 1 1 12.6' 1.50 34.65
142T/yr x 2,000 #/T - 2,840 cu.ft/yr
100 #/cu.ft
2,840 cu.ft/yr .065 AF/yr
= •009 Acre foot/Acre/yr
= •065 AF/ yr
6.97 acre
43,560 sq. ft/Acre
USE .035 Acre foot/Acre
Laydown
6 Area 40 .15 190' 13% 3.1 1 1 18.6'009 1.28 23.81
- •009 Acre foot/yr
- 480 cu.ft/yr
24 T/yr x
43,560 sq.ft/Acre ft
100 #/cu.ft
.011 Acre ft~ _ ,009 Acre ft/Acre yr L< ,035 Acre ft/Acre
1.28 Acre
USE .035 Acre ft/Acre
KEY
2 = Substation Pond
6 - 6C = East Laydown Pond
3 - 3C = East Sedimentation Pond
ion: Oate: 7/25/79
Land Condit
1/Area designations and key revised December 1981