Gwin Mine-Previously Producing Gold Mine for sale in Calaveras County. 87 acres This listing includes land, mineral rights and patent claims: Gwin Mine 016-012-039, North Paloma Mine 016-032-035, Messenger Mine 016-012-051, Gwin Mill Site 016-012-036, mineral rights in parcels 016-411-001-601 016-411-002-601. The mine is on the California Mother Lode in the Rich Gulch near Paloma. The zoning is ME + extra lateral mineral rights. Estimated gold reserves are between 300,000- 1,300,000 ounces. Extensive research and reports on file.