PERMFILE132039

• Permit No: C1994082A
• IBM Index Class Name: Permit File
• Doc Date: 9/30/2002
• Doc Name: Sediment Ponds SEDCAD4 Results
• Section_Exhibit Name: Tab 13 Attachment 13-12 Appendix 13-12.1
• Media Type: D
• Archive: Yes

• YOAST MINE -POND 12
HYDROLOGIC INPUT PARAMETERS
SEDCAD 4
WATERSHED ID
Structure 1 - SWS2

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 47 8.1
Total 19.9
CURVE NUMBER: 41
Soil Erodibility Factor (K):
SOIL ERODIBILITY FACTOR
SOIL AREA K K'AREA
TYPE (acres) FACTOR
Winevada 13.1 0.43 5.633
Coutis 1.8 0.20 0.36
SpliTro 5.0 0.20 1
ToTal 19.9 6.993
Weighted K FocTor: 0.35
Conhol Factor.
CONTROL FACTOR
CONTROL PRACTICE
CONDITION AREA
(acres) C
FACTOR C'AREA
Aspen/Mountain Brush
Sagebrush 11.8
8.1 0.042
0.042 0.5
0.3
Total 19.9 0.8
Weighted C FocTor: 0.042
~J