2008-12-04_PERMIT FILE - C1994082 ‎(35)‎

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 12/4/2008
• Doc Name: Sediment Ponds SEDCAD4 Results
• Section_Exhibit Name: Tab 13 Attachment 13-12 Appendix 13-12.1
• Media Type: D
• Archive: No

Yoast Mine
Pond 012A Design
HYDROLOGIC INPUT PARAp~IETERS
SEDCAD 4
Channel YPM-6-1
---
~
Watershed ID -Structure 7 -SWS2
Sedimentology: k factor
AREA
HYDROLOGIC SOIL
SOILS MAP UNITISOILS SERIES GROUP k FACTOR (acres)
B 0.32 20.50
Reclaimed B 0'37 1.7
XBDiE/F -Winevada -Splitro complex
46C/D -Splitro loam C 0.24 1.6
B 0.23 4.1
53C/D/ElF -Winevada loam 27'8
Total
Weighted k Factor 0.31
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
Channe! YPM-6-1
Watershed ID -Structure 7 - SWS1
Sedimentology: Control Factor CONTROL AREA
LAND USE CONDITION COVER TYPE VEGETATION FACTOR (acres)

Brush
AspeniMtn 25% canopy, 80% 0.042 6.69
Undistrubed . ground cover
d
i
i 60% ground cover 0.042 1.54
Reclaimed me
Rec
a
Total 8.2
Weighted C Factor 0.042
SEDCAD 4
Channel YPM-6-1
Watershed ID -Structure 7 -SWS2
Sedimentology: Control Factor CONTROL AREA
LAND USE CONDITION COVER TYPE VEGETATION FACTOR (acres)
25% canopy, 80%
Aspen/Mtn. Brush 0.042 4.0
Undistrubed ground cover
25% canopy, 80% 042
0 3.32
Sagebrush ground cover .
d 60% ground cover
l
i 0.042 20.5
Reclaimed me
a
Rec

Total 27.8
Weighted C 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 Soi! 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).
13-12.1-74 Revised 02108
TR-37