PERMFILE45602

• Permit No: C1994082A
• IBM Index Class Name: Permit File
• Doc Date: 2/28/2006
• Doc Name: Postmining Channels SEDCAD4 YPM-1 to YPM-6A
• Section_Exhibit Name: Tab 13 Attachment 13-12 Appendix 13-12.3
• Media Type: D
• Archive: Yes

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C J
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YOAST POSTMINE CHANNEL 4
HYDROLOGIC INPUT PARAMETERS
SEDCAD 4
WATERSHED ID
Structure 1 - SWS1
Watershed Area:
3.6 acres
Curve Number:
VEGETATION HYDROLOGIC CURVE AREA
WATERSHED TYPE COVER SOIL GROUP NUMBER (acres)
Reclaimed Fair B 71 3.6
Total 3.6
CURVE NUMBER 71
SEDCAD 4
WATERSHED ID
Structure 1 - SWS2
Watershed Area:
7.0 acres
Curve Number:
VEGETATION HYDROLOGIC CURVE AREA
WATERSHED TYPE COVER SOIL GROUP NUMBER (acres)
Aspen/Mountain Brush Good (>70%) C 41 3.45
Sagebrush Good (>70%) D, 55 3.58
Total 7.03
CURVE NUMBER 48
SEDCAD 4
WATERSHED ID
Structure 1 - SWS3
Watershed Area:
9.4 acres
Curve Number:
VEGETATION HYDROLOGIC CURVE AREA
WATERSHED TYPE COVER SOIL GROUP NUMBER (acres)
Reclaimed Fair B 71 9.4
Total 9.4
CURVE NUMBER 71