The initial digging of Duluth’s ship canal was fairly simple. The steam-powered dredging tug Ishpeming began chewing through Minnesota Point in September 1870, stopped when the ground froze in ...
The flexible Bucyrus-Ruth model HU Dredger is shown in travel position. An operator hand cranks the steering adjustment of the remote crawler on the Ruth Dredger. The Ruth Dredger was a unique ...
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