2008-12-04_PERMIT FILE - C1994082 ‎(10)‎

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 12/4/2008
• Doc Name: Pond 012 and Pond 012A Two-Pond System Design ‎(Pgs 13-12.1-149 to 13-12.1-225)‎
• Section_Exhibit Name: Tab 13 Attachment 13-12 Appendix 13-12.1 Part 2
• Media Type: D
• Archive: No

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TR-37
Yoast Mine
Pond O'i2l0'12A System
HYDROLOGIC INPUT PARAMETERS
SEDCAD 4
Channel YPM-5-1A
Watershed ID -Structure 10 -SWS2
Sedimentology: k factor
SOILS MAP UNIT/SOILS HYDROLOGIC SOIL AREA
SERIES GROUP k FACTOR (acres)
B 0'32 7.24
Reclaimed
7.2
Total
Weighted k Factor 0.32
Sails 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 soil erodibility factor, "k-Factor", values are presented in Attachment 13-12, Table 13-12.2.
SEDCAD 4
Channel YPM-5-1
Watershed ID -Structure 10 - SWS1
Sedimentology: Control Factcr
CONTROL AREA
LAND USE CONDITION COVER TYPE VEGETATION FACTOR (acres)

Undistrubed
Aspen/Mtn. Brush 25°!o canopy, 80%
ground cover 0.042 2.2
25% canopy, 80% 042
0 2.77
Sagebrush ground cover .
d
l
i
R 60% ground cover 0.042 40.68
Reclaimed me
ec
a
Total
45.7
Weighted C Factor 0.042
SEDCAD 4
Channel YPM-5-1A
Watershed ID -Structure 10 -SWS2
Sedimentology: Control Factor
CONTROL AREA
LAND USE CONDITION COVER TYPE VEGETATION FACTOR (acres)
Reclaimed Reclaimed 60% ground cover 0.042 7.24
7.2
Total
Weighted C Factor 0.042
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).
13-12.1-191
Revised 08/08