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

XX! 6
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Project: EAST MINE
Areas Land
of use or
Project Cond,
EROSION CALCULATIONS Y.EY
2 = Substation Pond
6 - 6C = East Laydown Pond
3 - 3C = East Sedimentation Pond
Land Condition; Date: 7/25/73
Est.
Universal Soi]-Loss Equation Factors Soil
Loss
R K L S LS C P T/Ac/Yr
Est.
Acres Soil Loss
in from Area
Area Tons/Yr
fib-

21/ Station
P
d
4
'
'022
on 0 .15 280 21% 8 1 1 8 1.08 51.84
52T/yr x 2.000 #/T 1 040 cu. ft/yr 1,040 cu.f~r + ,024 Acre foot/yr
100 #/cu. ft 43,560 sq.ft/AF
.024 Acre foot/~ = 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 g•g• .50 4.95
Above fan
6B & old sub. 40 15 200" 30% 12 1 1 72•D•033
. .94 67.68
S]ope abov
3 highway 40 .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
38 Tank 40 .15 150' 20% 5.3 .15 1 4.8'002 .29 1.39
Mine
6C Yard 40 .15 450' 8% 2.1 1 1 12.6.006 1.50 18.90
Mine
006
3C Yard 40 •15 450' 8% 2.1 1 1 12,6. 1.50 34.65
142T/yr x 2,D00 #/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
24 T/yr x 100 #/cu.ft - 480 cu.ft/yr 83,560 sq.ft/Acre ft - •009 Acre foot/yr
.011 Acre ft/yr = •009 Acre ft/Acre yr~< .035 Acre ft/Acre
1.28 Acre
USE .035 Acre ft/Acre
1/Area designations and key revised December 1981