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 INPl1T PARAMETERS
SEDCAD 4
WATERSHED ID
Structure 3 - SW S2
•
r ~
LJ
Watershed Id:
S3-SWS2
Watershed Area:
Curve Number:
5.2 acres
WATERSHED TYPE COVER SOIL GROUP NUMBER (acres)
Sa ebrush Good(>70% D 55 1.3
Aspen/Mountain Brush Good(>70% D 48 3.5
Mesic Draina a 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 Clay Loam 0.8 0.28 0.2
Coutis Slit Loam 2.0 0.37 0.7
Roxal Variant 12 0.28 0.3

_ ___5.1
--
Wei hted K Factor 0.32
Control Factor:
SOIL TYPE AREA (acres) C FACTOR C'AREA
Sa ebrush i.3 0.042 O.i
As en/Mountain Brush 3.5 0.042 0.1
Mesic Draina a 0.4 0.100 0.0
5.2
Weighted 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