CHARTER OAK MINE Nigger Hill District. Powell County. Minerals Yearbook 1944. Page 386. Ore treated in the company 50-ton flotation mill; some shipped to a smelter. (Zinc-lead, silver ore).
WPA, "Charter Oak Mine" (1944). Minerals Yearbook, All. 168.
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Charter Oak Mine, Nigger Hill District, Powell County, zinc-lead, silver ore, flotation mill, smelter