















▲ 411 r/TheForgottenDepths
Civil War Era Copper Fissure Mine in Keweenaw Co., MI
No major mining activity has occurred in this mine for over 160 years. Only the top level is accessible, and even parts of that are flooded. The main shaft is flooded, as well as a winze. Unfortunately, there is evidence of white nose in the bat population (photo 4).
u/jschjolberg — 2 days ago