2011-04-08_PERMIT FILE - C1981012A ‎(6)‎

• Permit No: C1981012A
• IBM Index Class Name: Permit File
• Doc Date: 4/8/2011
• Section_Exhibit Name: EXHIBIT 08 HYDROLOGY AND GEOLOGY INFORMATION
• Media Type: D
• Archive: Yes

Table of Contents (Coot)
Tables
Table 1 Historic Summary of Water Quality at PRS-1, Middle Fork of the
Purgatoire River .................................... 3
Table 2 Historic Sutmnary of Water Quality at PRS-3, North Fork of the
Purgatoire River .................................... 5
Table 3A Drill Hole Data .................................... 10
Table 3B Water Level Summary from Drilling at Golden Eagle and New Elk .... 11
Table 4 Leakance and Discharge Values for Mine Inflow Predictions for the Raton
Formation Adjacent to Golden Eagle ....................... 16
Table 5 Comparison of Areal Extent of Mining Projections: 1980 and 1994 .... 18
Table 6 Summary of Golden Eagle Mine Inflow Calculations for Coal Face and
Roof ........................................... 19
Table 7 Extent of Drawdown of Piezometric Surface during Mining of the
Golden Eagle Mine .................................. 24
Table 8 Comparison of Quality of Mine Discharge and Stonewall Water Quality .. 26
Table 9 Prediction of Golden Eagle Mine Discharge on Quality of Water in the
North Fork of the Purgatoire River at Low Flow (4 cfs) and Mean Flow
• (20 cfs)' ......................................... 28
Table 10 Prediction of Golden Eagle Mine Discharge on Quality of Water in
North Fork of the Purgatoire River at Low Flow (4cfs) and Mean
Flow (20 cfs)' .....................
................ 28
Table 11 Comparison of 1980 Projections of Water Quality in the Middle Fork
of the Purgatoire below the New Elk Mine with 1993 Monitoring Data
atPRS-4 ......................................... 32
Table 12 Comparison of 1980 Projections of Water Quality in the Middle
Fork of the Purgatoire below the New Elk Mine with 1994 Revised
Estimates ........................................ 35
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