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Mining engineering students at Big Five Tunnel

A group of students are standing at the entrance to the Big Five Tunnel, Idaho Springs, Colorado. Some of the men are holding mining tools.

Five mining engineering students are standing with surveying equipment inside a gypsum mine.

A group of students are standing at the entrance to the Big Five Tunnel, Idaho Springs, Colorado. Some of the men are holding mining tools.

Five mining engineering students are standing with surveying equipment inside a gypsum mine.

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