PERMFILE50229

• Permit No: C1981013
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 06 HYDROLOGY INFORMATION
• Media Type: D
• Archive: No

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Table of Contents
I. Quantitative Impacts of Mining .................................. 1
Surface Water .......................................... 1
Groundwater ........................................... 8
Conclusion ............................................ 24
II. Water Quality Impacts ....................................... 25
Surface Water .......................................... 25
Golden Eagle Mine .................................. 25
New Elk Mine ..................................... 29
Groundwater ...........................................33
New Elk Mine ..................................... 33
Conclusion ............................................ 33
References ...................................... ...36
Figure 1 Purgatoire River Minimum Monthly Flow vs. Time, Stonewall, Colorado,
ures
1978-1981 ...................................... .. 2
Figure 2 Purgatoire River Minimum Monthly Flow vs. Time, Madrid, Colorado, 1972-
1992 ......................................... .. 2
Figure 3 Conductance and Flow, Stonewall, Colorado ................. .. 7
Figure 4 Conductance and Flow, Madrid, Colorado .................. .. 7
Figure 5 Regional Hydrology ................................ .. 20
Figure 6 Shafts and Holes Inflow/Acre by Year & Seepage Rate/Acre by Year .. . 21
Figure 7 Observed Drawdown at Short Distance from Golden Eagle ......... . 22
Figure 8 Water Quality (Stream and Alluvium) Golden Eagle Mine (Upstream,
Downstream) .................................... ..27
Figure 9 Water Quality (Stream and Alluvium) Near the New Elk Waste Dump .. . 30
Figure 10 Water Quality (Stream and Alluvium) New Elk and Golden Eagle
Mines ........................................ ..34
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