BIG EIGHT MINE Troy or Grouse Mountain District. Lincoln County. Minerals Yearbook 1944. Page 384. Some ore shipped to East Helena smelter and some to custom concentration mills in Utah. (Zinc-lead ore).
WPA, "Big Eight Mine" (1944). Minerals Yearbook, All. 81.
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Big Eight Mine, Troy or Grouse Mountain District, Lincoln County, ore, zinc, lead