PERMFILE109758

• Permit No: C1994082A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: SEDIMENT PONDS SEDCAD4 RESULTS
• Section_Exhibit Name: TAB 13 Attachment 13-12 APPENDIX 13-12.1
• Media Type: D
• Archive: Yes

VOAST MINE -POND 12
HYDROLOGIC INPUT PARAMETERS

SEDCAD 4
WATERSHED ID
Structure 1 - SWS3

Watershed Area:
19.9 acres
Curve Number:
WATERSHED VEGETATION HYDROLOGIC CURVE AREA
TYPE COVER SOIL GROUP NUMBER (acres)
Aspen/Mountain Brush Good (>70%) B 30 3.8
Aspen/Mountain Brush Good (>70%) C 41 8.0
Sagebrush Good (>70%) C 41 8.1
Total 19.9
CURVE NUMBER: 41
Soil Erodibility Factor (p:
SOIL ERODIBILITY FACTOR
SOIL AREA K K'AREA
TYPE (acres) FACTOR
Wnevada 13.1 0.43 5.633
Coutis 1.8 0.20 0 36
Spliho 5.0 0 20 1
Total 19.9 6.993
Weighted K Factor: 0.35
Control Factor:
CONTROL FACTOR
CONTROL PRACTICE
CONDITION AREA
(acres) C
FACTOR C'AREA
Aspen/Fountain Brush
Sagebrush 11.8
81 0.042
0.042 0.5
0.3
Total 19.9 0.8
Weighted C Factor: 0.047
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