REV07488

• Permit No: C1980006
• IBM Index Class Name: Revision
• Doc Name: APPENDIX E & F
• Type & Sequence: SL2
• Media Type: D
• Archive: No

KERR COAL MINE
CALCULATED SEDIMENTOLOGY DATA
PREMINING CONDITION MARR PIT
SOIL ERODIBILITY FACTOR:

Soil Type Emtlibiliry
Factor, K
Clay Loam 0.26
SLOPE FACTOR:
Length

rt Slope

% m Slope
Angle
tae LS
Factor
160 13.0% Ofi 74 2.66
220 11.0% 0 8 6 3 2.60
200 11.0% 0.8 8.3 2.48
190 18.0% 0.6 10.2 441
360 9.0°0 0.5 5.1 2.24
410 80% O5 4.fi 2.12
520 90% OS 51 2fi9
fi70 10.0% 0.5 5.7 3.58
210 B.0% 0.5 4.8 1.82
290 9.0% 0 5 5 1 2 01
370 8.0% 05 46 2.01
250 30.0% 0.8 18.7 9.09
350 10.0 % 0.5 5.7 2.57
170 3.0 % 0.3 1.7 0 46
350 3.0°0 0.3 1.7 0.57
440 140% O6 80 5.39
280 14.0 % 0.6 8 0 4.11
350 11.0 % 0.6 8.3 3.44
Average LS= 300
The LS Factor was calculated by:
LS = (Slope LenplM2.6J"m'(10.8•sin(slope angle) + 0.03) /or Slopes < 9%
LS = (Slope Lengfl/72.6)"m'118.8•sin(slope angle) - 0.5J /or Slopes > B%
Where:
Slope<3% m=0.3
Slope=4% m=0.4
5%>Slope <f0% m=0.5
Slope> f0% m=0.6
COVER AND PRACTICE FACTORS:
Cover
Type Cover

%) Canopy

1 % Area

acres Cover
Factor, C C'Area Praclirn
Factor, P P•Area
Alkali Sa ebmsh 44% 25% 92 008 7.36 100 82.00
Sa ebrush-Gross 56% 25 % 16.3 0.05 0.82 1.00 18.30
TOTAL: 108 3 8 10 106.30
Weighed C =Total C'Area/ Total Area = 0.075
Weiplxed P =Trial P'Area1 Trial Area = 1.000
ANNUAL SEDIMENT YIELD
The Idlowinp spmatlsheet calculates the predicted sediment yieltl tar the prgecl area. The gross sediment yield
is determined according to the Revised Universal Soil Loss Equation.
PARAMETER DESCRIPTON VALUE
Annual RainYall Farxor 1650
Soil Erotlib~liry Factor 0.28
Length Slope FaLLof 3.00
Cover Factor 0.06
Practice Factor 1.00
Gross Annual Sediment Yield 1.05 tonsracreJyear