2008-12-04_PERMIT FILE - C1994082 ‎(2)‎

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 12/4/2008
• Doc Name: 10 Year, 24 Hour Postmine SEDCAD Demonstration
• Section_Exhibit Name: Tab 13 Attachment 13-3A.1 Appendix 13-3A.1-A
• Media Type: D
• Archive: No

YOAST MINE
Fond 10 -Watershed W-20
HYDROLOGIC INPUT PARAMETERS
WATERSHtu w
Structure 5 - SWS1
Watershed - W-20 (YPM-20)

TR-37
3edimentology: k factor
SOILS MAP UNIT/SOILS HYDROLOGIC SOIL k FACTOR AREA (ac
SERIES GROUP
32
0
7.09
Reclaimed B .
0 19 5.6
12C/D -Buckskin loam C
8
3
p 0.19 .
35C/D - Aaberg clay 0 28 0 8
66DlE/F - Foidel silt loam B
17.2
Total
Weighted k Factor 0.23
Soils series information from Yoast Mine Permit Application Package (see Tab 9, Soil Baseline Study
[Nyenhuis, 1994]). Hydrologic Soil Group values are approved Yoast values (see Attachment 13-12, Table
13-12.2). The soil erodibility factor, "k-Factor', values are presented in Attachment 13-12, Table 13-12.2.
13-3A.1-A.30
Revised 02108
Vegetation cover conditions presented in Tab 10, Vegetation, Attachment 10-1, 1990/1992 Vegetation
Easeline Report, Yoast StudyArea (ESCO Associates, 1993). Approved Yoast Mine curve numbers are.
presented in Attachment 13-12, Postmining Drainage and Sediment Control, Table 43-12.1. Values were
adapted from Urban tiydrelogy for Small Watersheds, Technical Release No. 55, Soil Conservation
Service, 1986.