Sterling Hill Mining Museum In 1877, Iron Cliffs began exploratory drilling on this website overlooking Ishpeming. Drilling uncovered iron ore, and in 1879 the company opened the Cliffs Shaft, then generally known as the "New Barnum". A new boiler home and engine home had been built on the location http://juliusq7520.bloggosite.com/8611541/mining-the-treasures-of-twitterverse