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

r/

Yoast Mine
Pond 012/012A System
HYDROLOGIC INPUT PARAMI=TERS
SEDCAD4
Channel YPM-6-3
Watershed ID -Structure 12 - SWS1
Sedimentology: Control Factor
CONTROL AREA
LAND USE CONDITION COVER TYPE VEGETATION FACTOR (acres)

Undistrubed As eniMtn. Brush
p 25% canopy, 80%
ground cover 0.042 2.79
Sagebrush 25% canopy, 80% 0.042 0.74
ground cover
Herbaceous 60% ground cover 0.042 1.1
Reclaimed Reclaimed 60% ground cover 0.042 12.4
Topsoiled Bare 1 8.67
Total 25.7
Weighted C Factor 0.365
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).
•
Revised 08!08
TR-37 13-12.1-195