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01/11/99 TH[1 10:12 FrIT JOJ i820J90 CDPBE/ISaCD 1~J005 <br />• <br />• <br />EPA REGION VIII -INSPECTION REPORT <br />Bulldog Mine <br />DATE: June 25,1998 <br />PERSONNEL Melanie Pallman, EPA - NPDES Enforcement <br />PRESENT: Darcy O'Connor, EPA - NPDES Enforcement <br />SCOPE: <br />This report summarizes an inspection ofthe Bulldog Mine, an inactive silver mine located <br />in Mineral County, Colorado. Homestake Mining, owners of the Bulldog Mine, were issued <br />NPDES permit !k CO-0000710 to discharge treated mine drainage to Windy Gulch. Mine <br />drainage flawed from the adit to a treatment plant where the mine drainage was treated with lime. <br />DMRs for this permit have indicated no discharge since at least January 1991. The mine drainage <br />treatment plant is no longer operational. <br />The Bulldog mine is currently under reclamation, under the supervision of the Colorado <br />Division oflldirterals and Geology. Two concrete plugs had been installed during the spring and <br />summer 1998. Mine drainage continued to flow from behind the plugs and was directed to a <br />pond and then land applied upland of Windy Gulch. <br />FiNDiNGS: <br />Mine drainage was observed from the Bulldog mine adit. This drainage was split <br />into two flows. One flow was collected in an evaporation pond and inspectors <br />assumed it would eventually be land applied as the pond was connected to the land <br />application equipment. The other flow was directed underground, and the <br />inspectors were unable to determine where the flow was directed <br />2. Red/orange staining was observed in the area of the land application equipment. <br />Rills were observed in the land application area indicating that some nnoff ofthc <br />land applied mine drainage and/or storm water had occurred to Windy Gulch. <br />