2008-12-04_PERMIT FILE - C1994082 ‎(35)‎

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 12/4/2008
• Doc Name: Sediment Ponds SEDCAD4 Results
• Section_Exhibit Name: Tab 13 Attachment 13-12 Appendix 13-12.1
• Media Type: D
• Archive: No

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Yoast IY1ine
Pond 012A Design
H`tDROLOGIC INPUT PARANIET~RS
entology: K raczor
_S MAP UNIT/SOILS
SERIES
red
- Splitro loam
Total
SEDCAD 4
Channel YPM-1-1
ad ID -Structure 1 -
GROUP ~ k FACTOR tacres
B 0.32 51.10
C 0.24 3.1
54.2
hted k Factor 0.32
•
TR-37
Soils series information from Yoast Mine Permit Application Package (see Tab 9, Soil Baseline Study
[Nyenhuis, 1994]). Hydrologic Sail 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.
13-12.1-63
Revised 02/OS
Vegetation cover conditions presented in Tab 10, Vegetation, Attachment 10-1, 1990/1992 Vegetation
Baseline Report, Yoast Study Area (ESCO Associates, 1993). Approved Yoast Mine curve numbers are
presented in Attachment 13-12, Postmining Drainage and Sediment Control ,Table 13-12.1. Values were
adapted from Urban Hydrology for Small Watersheds, Technical Release No. 55 ,Soil Conservation
Service, 1986.