An idea of what they mean, you've got to go down. down deep into the hill. an intricate warren of tunnels, whittled through the rock and soil that lay beneath the city was flooded forever by water and darkness. the orphan boy mine is one of the few remaining hard rock mines in the city. today, it serves as a training facility for the montana tech school of mines and engineering. >> there's five generations of mining here. in order to survive and provide the resources for america, these people were super skillful. >> jim keane is a state senator and labor advocate who grew up working the mines ...