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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West side subwatershed
-tershed Area: 3.1
rve Number:
WATERSHED TYPE
Reclaimed
AspeniMountain Shrub
Total
Yoast Mine
Pond 0121012A System
HYDROLOGIC Ii~PUT PARAMETERS
SEDCAD 4
Channel YPM-1-2
Watershed ID -Structure 3 - SWS1
VEGETATION COVER
Fair (30% - 70%)
Good (>70%)
1YDROLOGIC curcvt
SOIL GROUP NUMBER
g 71
g 30
AREA
(acres)
2.6
0.6
3.1
64
CURVE NUMBER

SEDCAD 4
Channel YPM-1-2
Watershed ID -Structure 3 - SWS2
East side subwatershed
Watershed Area: 7.8
Curve Number:
WATERSHED TYPE
Reclaimed
Sagebrush
Total
CURVE NUMBER
(acre:
7.2
0.6
7.8
69
Vegetation cover conditions presented in Tab 10, Vegetation, Attach oved Yoast M n0e ou9rve n umbersnare
Baseline Report, Yoast Study Area (ESCO Associates, 1993). App
presented in Attachment 13-12, Postmining Drainage and Sediment Control ,Table 13-12.1. Values were
adapted from Urban Hydrology for Small Watersheds, Technics! Release No.' S5, Soil Conservation Service,
1986.
SEDCAD 4
Channel YPM-1-2
ea in _ Structure 3 -

SOILS MAP UNIT/50IL5 acre
SERIES HYDROLOGIC SOIL GROUP k FAO 32OR (2 57
Reclaimed B
B 0.23 0.6
53C1D/E!F - Winevada loam 3,1
Total '°
Weighted k Factor 0.30
VEGETATION COVER SOIL GROUP NUMBER
Fair (30% - 70%) B 71
Goad (>70%) C 47
13-12.1-176 Revised 08108
TR-37