Gratiot Copper mine - Gratiot location, Keweenaw County.Gratiot Lake Project Prospect - Gratiot Lake, Keweenaw County.Gogebic mine - Bergland, Ontonagon County.Globe mine - Painesdale, Houghton County.Girard Mining Company mine - Keweenaw County.Garden City mine - Phoenix, Keweenaw County.G-13 Prospect - Lac La Belle, Keweenaw County.G-12 Prospect - Lac La Belle, Keweenaw County.Delevan mine - Porcupine Mountains, Ontonagon County.Cuyahoga mine - Porcupine Mountains, Ontonagon County.Copper Falls mine - Copper Falls, Keweenaw County.Connecticut mine - Delaware, Keweenaw County.Concord and Douglas Copper Mine - Houghton County.Clifton mine - Norwich, Ontonagon County.Cliff mine - abandoned Clifton, Keweenaw County operated from 1845 to 1878.Clark mine - near Copper Harbor, Keweenaw County.Chicago and Isle Royale mine - on the northwest shore of Isle Royale National Park.Cherokee mine - Twin Lakes, Houghton County.Chippewa Mining Company Exploration - Ontonagon County.Champion mine - Painesdale, Houghton County.Challenge Copper mine - Toivola, Houghton County.Central mine - Central, Keweenaw County.Central Exploration - Central, Keweenaw County. Centennial mine - Centennial Heights, Houghton County Calumet, Houghton County and Kearsarge, Houghton County.Cascade prospect - Matchwood Township, Ontonagon County.Carp Lake mine - Porcupine Mountains, Ontonagon County.
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