2008-12-04_PERMIT FILE - C1994082 ‎(35)‎

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 12/4/2008
• Doc Name: Sediment Ponds SEDCAD4 Results
• Section_Exhibit Name: Tab 13 Attachment 13-12 Appendix 13-12.1
• Media Type: D
• Archive: No

.7
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Yoast Nline
Pand 012A Design
~iYDROLOGIC IyPUT PARAMETERS
SEDCAD 4
Channel YPM-1-3
Watershe ucture 5 -SWS2
Sedimentology: k factor
AREA
SOILS MAP UNIT/SOILS
SERIES HYDROLOGIC SOIL GROUP k FACTOR (acres)
B 0.32 10.50
Reclaimed C 0.24 0.6
46C/D - Splitro loam 6
B 0.23 0.
53C/D/E/F - Winevada loam 11.6
Total
Weighted k Factor 0.31
Soils series information from Yoast Mine Permit Application Package (see Tab 9, Soil Baseline Study
[Nyenhuis, 1994]). Hydrologic Soil Group values are approved Yoast values (see Attachment 13-12, Table 13-
12.2). The sail erodibility factor, "k-FaC,or", values are presented in Attachment 13-12, Table 13-12.2.
SEDCAD 4
Channel YPM-1-3
Watershed ID -Structure 5 - SWS1
Sedimentology: Control Factor
CONTROL AREA
LAND USE CONDITION COVER TYPE VEGETATION FACTOR {acres)

Undistrubed
AspeniMtn. Brush 25% canopy, 80%
ground cover 0.042 3.23
d
i 60% ground cover 0.042 6.28
Reclaimed me
Recla

Total 9.5
Weighted C Factor 0.042
SEDCAD 4
Channel YPM-1-3
Watershed ID - rtS ucture 5 -SWS2
Sedimentology: Control Factor
CONTROL
AREA
LAND USE CONDITION COVER TYPE VEGETATION FACTOR (acres)

Undistrubed
AspeniMtn. Brush 25% canopy, 80%
ground cover 0.042 0.7
25% canopy, 80% 042
0 0.4
Sagebrush ground cover .
d 60% ground cover 0.042 10.5
Reclaimed Reclaime 6
Total 11.
Weighted C Factor 0.042
The Control Factor values are approved Yoast Mine values as presented in Attachment 13-12, Table 13-12.3.
The values were originally presented in Renard, et al. (1997) Predicting Soil Erosion by Water. A Guide to
Converation Planning with the Revised Universal Soil Loss Equation (RUBLE), Agricultural Handbook 703,
U.S. Department of Agriculture as reported in Warner et al. (1998) as reported in Warner et al. (1998).
13-12.1-70 Revised 02!08
TR-37