2009-10-30_PERMIT FILE - C1994082A

• Permit No: C1994082A
• IBM Index Class Name: Permit File
• Doc Date: 10/30/2009
• Doc Name: Permanent Pond Demonstrations
• Section_Exhibit Name: Tab 20 Appendix 20-1.2
• Media Type: D
• Archive: Yes

Yoast Mine
Stockpond ST-1 As-Built Report
HYDROLOGIC INPUT PARAMETERS
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TR-37
20-1.2-E.14
Revised 08/08
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.