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

j Yoast M9ne
Pond 0121012A System
HYDROLOGIC INPUT PARAMETERS
•
SEDCAD 4
Pond 012
Watershed ID -Structure 14 -SWS2
Sedimentology: k factor
AREA
HYDROLOGIC SOIL
SOILS MAP UNITlSOILS SERIES GROUP k FACTOR (acres)
Pond Surface N/A N/A N/A
1.2
Total
Weighted k Factor N/A
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 012
Watershed ID -Structure 14 - SWS1
Sedimentology: Control Factor
CONTROL AREA
LAND USE CONDITION COVER TYPE VEGETATION FACTOR (acres)

AspenlMtn. Brush 25% canopy, 80% 0.042 1.51
Undistrubed ground cover
25% canopy, 80% 042
0 0.59
Sagebrush ground cover .
Herbaceous 60% ground cover 0.042 1.3
Reclaimed Reclaimed 60% ground cover 0.042 3.12
il
d
T Bare 1.0 3.42
Disturbed opso
e
Total 9'9
Weighted C Factor 0.372
SEDCAD 4
Pond 012
Watershed ID -Structure 14 -SWS2
Sedimentology: Control Factor
CONTROL
AREA
LAND USE CONDITION COVER TYPE VEGETATION FACTOR (acres)
Pond Surfacc$ NIA N!A NfA 1.17
Total 1.2
Weighted C Factor N/A
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 Soii 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
13-12.1-199
Revised 08/08