Whaleback Str. Pathfinder in the locks, Sault Ste. Marie, Mich., "5 Phot." on transparency., Detroit Publishing Co. no. 018231., Gift; State Historical Society of Colorado; 1949, Pathfinder (Whaleback) , Locks (Hydraulic engineering) , United States, Michigan, Sault Sainte Marie.

Size: 2943px × 2378px
Photo credit: © piemags/LCB / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., pathfinder, unite