CHARTER OAK MINE Nigger Hill District. Powell County. Minerals Yearbook 1945. Page 400. Hopkins & Sons Mining Company shipped 19 tons of lead ore to a smelter and treated 385 tons of zinc-lead ore in the company mill.
WPA, "Charter Oak Mine" (1945). Minerals Yearbook, All. 167.
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Charter Oak Mine, Nigger Hill District, Powell County, Hopkins & Sons Mining Company, zinc-lead ore, lead ore, smelter