The Troy Mine is a silver and copper producer near Troy, Montana, in Lincoln County. It operated between 1981 and 1993, when it was closed. It was re-opened in 2005 to be used as a training site for the Rock Creek Mine, located nearby in Sanders County, Montana.
The Troy Mine produced about 1.25-1.4Moz silver per annum as of 2012; 159,121 pounds of copper and 27,053 pounds of silver between November 2014 and January 2015.[1] [2] [3]
A miner was killed in a cave-in in 2007. Rockslides and rock falls closed the mine in December 2012. It re-opened in September 2014.[4]
In January 2015, Revett Minerals Inc. announced that the Troy Mine would be "placed on care and maintenance" due to low minerals prices.[2] [3]
In March 2015, it was announced that Hecla Mining would purchase both Troy Mine and nearby Rock Creek Mine, and that Troy Mine, which has a $12.9 million reclamation bond, would be closed.[5] [6]
As of 2012, the total reserve base was 12Moz of silver.[1] An estimated 12 years of ore remained in its deposits as of 2015.[6]