2008-12-04_PERMIT FILE - C1994082 ‎(23)‎

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 12/4/2008
• Doc Name: 10 Year 24 Hour SEDCAD Demonstration
• Section_Exhibit Name: Tab 13 Attachment 13-17.1 Appendix 13-17.1-A
• Media Type: D
• Archive: No

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Yoast Mine
Pond 014 Permanen# Feature Demonstration
HYDROLOGIC INPUT PARAMETERS
Pond 014
_
Watershed ID -Structure 6 -SWS2
Sedimentology: k factor
HYDROLOGIC SOIL AREA
SOILS MAP UNIT/SOILS SERIES GROUP k FACTOR (acres)
Reclaimed B 0.32 33.76
X8D1E/F -Winevada - Splitro complex B 0.37 4.2
27D -Silas loam B 0.28 0.7
34D - Coutis silt loam B 0.36 2.0
46D - Splitor loam C 0.24 1.5
53D -Winevada loam B 0.23 3.3
66D - Foidel silt loam B 0.28 1.1
Total 46.6
Weighted k Factor 0.32
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-Factor", values are presented in Attachment 13-12, Table 13-12.2.
Pond 014
Watershed ID -Structure 6 - SWS1
Sedimentology: Control Factor

LAND USE CONDITION
COVER TYPE
VEGETATION CONTROL
FACTOR AREA
(acres)
Reclaimed Reclaimed 60% ground cover 0.042 2.02
Total 2.0
Weighted Control Factor 0.042
Pond 014
Watershed ID -Structure 6 -SWS2
Sedimentology: Control Factor
CONTROL AREA
LAND USE CONDITION COVER TYPE VEGETATION FACTOR (acres)
25% canopy, 80%
Undistrubed Aspen/Mtn. Brush 0.042 12.88
ground cover
Reclaimed Reclaimed 60% ground cover 0.042 33.76
Total 46.6
Weighted Control 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).
TR-37 13-17.1-A.19 Revised 02/08