Bisbee Mining & Historical Museum In 1877, Iron Cliffs began exploratory drilling on this web site overlooking Ishpeming. Drilling uncovered iron ore, and in 1879 the corporate opened the Cliffs Shaft, then known as the "New Barnum". A new boiler house and engine home had been built on the http://dominickp1y0u.ttblogs.com/8385375/new-mexico-mining-museum