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Unique Method Of Driving Large Tunnel At The Hannibal Quarry Of The Atlas Portland Cement Company, James Leonidas Boucher
Unique Method Of Driving Large Tunnel At The Hannibal Quarry Of The Atlas Portland Cement Company, James Leonidas Boucher
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"During the development of operations at the limestone Quarry of The Atlas Portland Cement Company, Hannibal, Mo., it was found necessary to drive a large tunnel from one open "cut" to a point where the opening up and development of other "cuts" could be carried on"--page 1.