Created 6-Aug-15
4 photos

Board_sluice,_below_Minneapolis

Board_sluice,_below_Minneapolis

Board_sluice_at_the_Falls_of_St._Anthony

Board_sluice_at_the_Falls_of_St._Anthony

Board_sluice_on_the_Mississippi_at_St._Anthony

Board_sluice_on_the_Mississippi_at_St._Anthony

Stripping_off_the_surface_dirt_covering_the_Morris_open_pit

Stripping_off_the_surface_dirt_covering_the_Morris_open_pit

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