PERMFILE67869

• Permit No: C1982057A
• IBM Index Class Name: Permit File
• Doc Date: 7/15/2005
• Doc Name: As-Built Report Sedimentation Structure Pond 016A
• Section_Exhibit Name: Tab 13 Attachment 13-5F Appendix 2
• Media Type: D
• Archive: Yes

• SENECA II West Coal Mine
Pond 16 System
HYDROLOGIC INPUT PARAMETERS
SEDCAD 4
WATERSHEDfD
Structure 1 - SWS1
Watershed Id:
S1-SWS7
Watershed Area:
Curve Number:
18.7 acres
WATERSHED TYPE COVER SOIL GROUP NUMBER (acres)
Sa ebrush Good(>70%) C 47 6.9
As en/Mountain Brush Good >70% B 30 11.8
Total 18.7
CURVE NUMBER 36
• Soil Erodabitity Factor (Kj:
SOIL TYPE AREA (acres) K FACTOR K'AREA
W inevada-Splitro
Complex
11.1
0.37
4.1
Skyway Silt Loam 7.2 0.28 2.0
18.3
Wei hted K Factor 0.33
Control Factor:
SOIL TYPE AREA (acres) C FACTOR C`AREA
Sagebrush 6.9 0.042 0.3
As en/Mountain Brush 11.8 0.042 0.5
Weighted CP Factor 0.04
Practice Factor:
SOIL TYPE AREA (acres) P FACTOR P`AREA
Undisturbed 18,7 1 18.7
Weighted CP Factor 1.00