2012-07-10_PERMIT FILE - C1981041 ‎(5)‎

• Permit No: C1981041
• IBM Index Class Name: Permit File
• Doc Date: 7/10/2012
• Doc Name: Soils Loss Comparison Roadside North Portal Cameo Refuse Disposal Areas and Cameo Borrow Areas
• Section_Exhibit Name: Tab 14 Appendix 14-13
• Media Type: D
• Archive: No

SOIL LOSS COMPARISON - CAMEO REFUSE DISPOSAL AREA #2
AND CAMEO TOPSOIL PILES - POND 10
RECLAIMED VERSUS BASELINE (ADJACENT) CONDITIONS
The following calculations are presented to determine if untreated drainage from the reclaimed Cameo Refuse
Disposal Area #2 and the Cameo Topsoil Piles is contributing suspended solids to streamflow or runoff outside
the permit area in excess of premining levels. Pond 10 collects run off from the Cameo Refuse Disposal Area #2
and the Cameo Topsoil Piles (see attached Appendix page A14- 13 -21).
The baseline data for comparison are considered to be those conditions that exist in the adjacent area. The
adjacent area for vegetative cover comparison is both the Greasewood and Shadscale reference areas (see attached
Appendix pages A14 -3-18 & A14- 3-19). The vegetation on the reclaimed and adjacent areas are presented in
detail in Cedar Creek Associates 2010 Revegetation Evaluation and are summarized below.
Greasewood Reference Area
Baseline
Baseline
Total Perennial Cover +Rock
18.85%
19
Perennial Cover.
Grasses, etc.
Grasses, etc.
4.85%
Forbs
Forbs
0.80%
0.15%
Shrubs
Shrubs
2.70%
11.25%
Trees
Trees
0.000/0
0.00%
Other - Rock
Other - Rock
2.60%
Total Perennial Cover +Rock
Total Perennial
Cover+Rock
25.40%
18.85%
Litter
24.10%
31.20%
Total Perennial Cover +Rock +Litter
44.90%
Total Perennial
Total Perennial
Cover +Rock +Litter
50.05%
Cano (Trees and Shrubs
11.2584
Cameo Topsoil Piles
Baseline
Reclaimed
Total Perennial Cover +Rock
25.40%
Perennial Cover:
Perennial Cover:
Grasses, etc.
Grasses, etc.
0.00%
Forbs
Forbs
0.80%
0.00%
Shrubs
Shrubs
2.70%
22.30%
Trees
0.000/0
0.00%
Other - Rock
3.10%
Total Perennial Cover +Rock
Total Pere VCover+Rock
Litter
25.40%
Litter
14.05%
24.10%
Total Perennial Cover +Rock +Litter
44.90%
Total Perennial
Cover +Rock +Litter
49.500/6
Canopy (Trees and Shrubs
22.30%
Shadscale Reference Area
Baseline
Total Perennial Cover +Rock
30.85%
Perennial Cover:
Grasses, etc.
4.10%
Forbs
0.80%
Shrubs
2.70%
Trees
0.000/0
Other - Rock
23.25%
Total Perennial Cover +Rock
30.85%
Litter
14.05%
Total Perennial Cover +Rock +Litter
44.90%
Canopy (Trees and Shrubs
2.70%
Cameo Refuse Disposal Area #2
Reclaimed
Total Perennial Cover +Rock
34.07%
Perennial Cover.
Grasses, etc.
1.00%
Forbs
5.87%
Shrubs
18.13%
Trees
0.00%
Other - Rock
9.07%
Total Perennial Cover +Rock
34.07%
Litter
20.20%
Total Perennial Cover +Rock +Litter
54.27%
Canopy (Trees and Shrubs)
18.13%
The Universal Soil Loss Equation will be used to calculate the soil loss from the reclaimed area and
the adjacent baseline area to determine if untreated drainage from the reclaimed mine site is contributing
suspended solids in excess of premining levels. The following sediment volume calculation is prepared in
accordance with U. S. Department of Agriculture, Technical Notes, Agronomy Note #50, dated January,
1977. The tables and figures utilized in the LISLE calculations are obtained from the referenced Agronomy
Note #50.
USING THE UNIVERSAL SOIL LOSS EQUATION
R (rainfall) factors are assigned by geographical regions based on weather data furnished by the U.S.
Weather Service. R values are based on rainfall amount, time, and intensity. In the mountains, R values
were computed primarily for valley areas and have been increased to account for run -off from snow melt.
The R factor of 20 used for this calculation is derived from an !so- erodent map, presented in the referenced
Agronomy Note #50, and is the same for both the reclaimed slopes and the adjacent natural slope.
K (soil erodibility) factors are assigned to each soil series and they are used to predict the erodibility of a
soil and its tolerance to erosion in relation to specific kinds of land use and treatment. Soils having the
highest K value are the most erodible. The K value used for this calculation is picked from the U.S.
Department of Agriculture Soil Survey, Douglas Plateau Area, and is based on the soils classification;
Torriorthents. The K factor of 0.37 is the same for the adjacent and reclaimed areas.
PR -5 A14 -134 02/12