1993-03-30_HYDROLOGY - M1977378

• Permit No: M1977378
• IBM Index Class Name: HYDROLOGY
• Doc Date: 3/30/1993
• Doc Name: Preliminary Characterization of the Hydrology and Water Chemistry- I
• From: Simon Hydro-Search
• To: San Juan County Mining Venture
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

TABLE OF CONTENTS Coii't
SECTION PAGE
4.2.2 Chemistry of Mine Waters . . . . . . . . . . . . . . . . . . . . . . . 41
4.2.3 Existing Treatment Facilities - Sunnyside Mine . . . . . . . . . . . 47
4.3 Present Surface-Water Hydrology . . . . . . . . . . . . . . . . . . . . . . . 49
4.3.1 Surface-Water Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.3.2 Surface-Water Chemistry . . . . . . . . . . . . . . . . . . . . . . . . 50
5.0 REFERENCES CITED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
FIGURES
Figure 1. Location of the Sunnyside Mine . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Stratigraphic Column in the Vicinity of Sunnyside Mine,
San Juan County, Colorado . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 3. Dominant Fracture System of the San Juan Caldera . . . . . . . . . . . . 10
Figure 4. Structural Geology in the Vicinity of the Sunnyside Mine,
San Juan County, Colorado . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 5. A Southwest Raking Ore Shoot on the 2150 Vein, Sunnyside Mine . . . 14
Figure 6. Schematic of Differing Fracture Permeability with Depth . . . . . . . . . 16
Figure 7. Hydrograph of Flow from the Terry Tunnel: 1987-1991 . . . . . . . . . 37
Figure 8. Hydrograph of Flow from the Terry Tunnel: Detail of 1991 . . . . . . . 38
Figure 9. Hydrograph of Flow from the American Tunnel: 1987-1991 . . . . . . . 39
Figure 10. Flow Profile Along the American Tunnel . . . . . . . . . . . . . . . . . . . 42
Figure 11. Profile of pH in the Drainage Ditch of the American Tunnel . . . . . . . 44
Figure 12. Load of Mn, Fe, and Zn Carried in the
American Tunnel Ditch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 13. Load of Copper and Cadmium Carried in the
American Tunnel Ditch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
TABLES
Table 1. Estimated Pre-Mine Ground-Water Gradient within the
Fractured Bedrock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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