Laserfiche WebLink
2.0 /NTRODUCT/ON <br />2. 1 Location and Brief Description of the Sunnyside Mine <br />The Sunnyside Mine is located approximately 8 miles north of Silverton in the Eureka <br />mining district in northernmost San Juan County, Colorado (Figure 1). The Sunnyside <br />Mine is presently owned by Sunnyside Gold Corporation (SGC), a subsidiary of Echo <br />Bay Mines. Gold, silver, copper, lead, zinc, and cadmium ores have been produced <br />from more than 150 miles of underground workings with a vertical extent of 2,000 <br />feet. The majority of the mine workings are located beneath Sunnyside Basin at the <br />head of Eureka Gulch (Figure 2). Year-round access to the main part of the mine is <br />via the 10,000 foot long American Tunnel, the portal of which is located at an <br />elevation of 10,617 feet at the abandoned townsite of Gladstone. Secondary access <br />is via the Terry Tunnel located in Eureka Gulch at an elevation of approximately <br />11,560 feet. The jeep trail to the Terry Tunnel is impassible during winter and spring. <br />2.2 Statement of the Problem <br />Sunnyside Gold Corporation is working toward closing the Sunnyside Mine with a goal <br />of reclaiming the mine property and reestablishing an approximation of the pre-mining <br />hydrogeologic system. As a part of this process SGC proposes to install underground <br />bulkheads in at least four locations in order to contain mine drainage. Drainage from <br />the Sunnyside Mine, which presently flows out of both the American Tunnel and the <br />Terry Tunnel, is slightly acidic and contains mobilized heavy metals (Simon Hydro- <br />cunnylwpltraci12251 ~Mar1993.Rpt rj <br />Nei SIRI011 HYDRO-SEARCH <br />