1993-03-30_REVISION - M1977378 ‎(2)‎

• Permit No: M1977378
• IBM Index Class Name: Revision
• Doc Date: 3/30/1993
• Doc Name: Evaluation of Hydraulic and Hydrochemical Aspects of Proposed Bulkheads
• From: Sunnyside Gold Corp.
• To: DMG
• Type & Sequence: TR14
• Media Type: D
• Archive: No

TABLE OF CONTENTS, Cont.
SECT/O/V
PAGE
9.0 WATER CHEMISTRY AFTER INSTALLATION OF PROPOSED
BULKHEADS ....................................... 58
9.1 Introduction and Methodology ...................... 58
9.2 Impounded Water at the American Tunnel Level .......... 60
9.3 Impounded Water at the Terry Tunnel Level ............. 63
9.4 Overall Chemistry of Impounded Water Expected to
Move through the Ground-Water System ............. . . 65
9.5 Anticipated Chemistry of Surface Discharge ............. 65
9.6 Effects of Discharge on Cement Creek ................. 66
9.7 Acid-Generating Potential of Wall Encrustations .......... 69
10.0 REFERENCES ...................................... 73
F/CURES
Figure 1. Location of the Sunnyside Mine ...................... 6
Figure 2. Relationship of Mine Workings to Surface Water Basins ...... 7
Figure 3. Dominant Fracture System of the San Juan Caldera ....... 12
Figure 4. Structural Geology in the Vicinity of the Sunnyside Mine,
San Juan County, Colorado ........................ 13
Figure 5. A Southwest Raking Ore Shoot on the 2150 Vein
Sunnyside Mine ................................ 15
Figure 6. Schematic of Differing Fracture Permeability with Depth .... 17
Figure 7. Flow Profile Along the American Tunnel ................ 23
Figure 8. Anticipated Principal Direction of Ground-Water Flow after
Bulkhead Installation ............................. 26
Figure 9. Schedule of Mine Flooding Based on MODFLOW Model ..... 38
Figure 10. Topographic Profile Across Cement Creek .............. 50
Figure A-1. 700 Hole Drawdown Test
Figure A-2. 700 Hole Recovery Test
Figure A-3. 702 Hole Drawdown Test
Figure A-4. 704 Hole Drawdown Test
Figure A-5. 704 Hole Recovery Test
Figure A-6. 781 Hole Drawdown Test
Figure A-7. 781 Hole Recovery Test
sunnylwpltraci1225 71Mar1993.Rpt
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