PERMFILE106328

• Permit No: C1982057
• IBM Index Class Name: Permit File
• Doc Date: 1/11/2007
• Doc Name: As-Built Report Sedimentation Structure Pond 016A
• Section_Exhibit Name: Tab 13 Attachment 13-5F Appendix 2
• Media Type: D
• Archive: No

SENECA II West Coal Mine
SEDCAD4
WATERSHED ID
Structure 4 -SWS2
Watershed !D:
S4-SWS2
Watershed Area:
Curve Number:
Pond 016 System
HYDROLOGIC INPUT PARAMETERS
5.:? acres
WATERSHED TYPE COVER SOIL GROUP NUMBER (acres)
Sa ebrush Good(>70%) D 55 1.3
As en/Mountain Brush Good >70%) D 48 3.5
Mesic Draina e Fair 30%<x<70%) C 81 0.4
Total 5.2
CURVE NUMBER 46
Soil Erodability Factor (K):
SOIL TYPE AREA (acres) K FACTOR K*AREA
Routt Cla 1.1 0.28 0.3
Binco Cla Loam 0.8 0.28 0.2
Coutis Slit Loam 2.0 0.37 0.7
Roxal Variant 1.2 0.28 0.3
5.1
Wei hted K Factor 0.32
Control Factor:
SOiL TYPE AREA (acres} C FACTOR C*AREA
Sa ebrush 1.3 0.042 0.1
Aspen/Mountain Brush 3.5 0.042 0.1
Mesic Drainage 0.4 0.100 0.0
5.2
Wei hted CP Factor 0.046
Practice Factor:
SOIL TYPE AREA (acres) P FACTOR P*AREA
Undisturbed 5.2 1 5.2
Wei hted CP Factor 1.00

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TR-56 13-SF-G.28 Revised 09!06