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

•
~~ Yoast Mine
Pond 012/012A System
HYDRO[_OGlG i~1PUT PARAl~IPTPI4S
SEDCAD 4
Pond 012A
Watershed ID -Structure 11 -SWS2
Sedimentology: k factor
AREA
SOILS MAP UNIT/SOILS
SERIES HYDROLOGIC SOIL GROUP k FACTOR (acres)
Pond Surface N/A N/A NIA
1.5
Total
Weighted k Factor NIA
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 soil erodibility factor, "k-Factor", values are presented in Attachment 13-12, Table 13-12.2.
•
SEDCAD 4
Pond 012A
__
Watershed ID -Structure 11 - SWS1
Sedimentology: Control Factor
CONTROL AREA
LAND USE CONDITION COVER TYPE VEGETATION FACTOR (acres)

Undistrubed
Aspen/Mtn. Brush 25% canopy, 80%
ground cover 0.042 0.6
d
l
im
R 60% ground cover 0.042 3.2
Reclaimed e
a
ec
3.8
Total
Weighted C Factor 0.042
SEDCAD 4
Pond 012A
Watershed ID -Structure 1 l -SWS2
Sedimentology: Control Factor
CONTROL AREA
LAND USE CONDITION COVER TYPE VEGETATION FACTOR (acres)
Pond Surfacce N/A NIA NIA 1.5
Total 1.5
Weighted C Factor NIA
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).
•
13-12.1-193
Revised 08!08
TR-37