Black and white halftone photograph showing the concrete protection to banks, during fourth Welland Canal construction, c. 1920. From the booklet "Welland Ship Canal (Under Construction)" by the Department of Railways and Canals.
Black and white photographic print showing the constructing of flight locks (Twin Flight Locks 5 and 6) on the Fourth Welland Canal at Thorold, c. 1927-1932.
Colour slide showing construction beginning on the east bank of the canal for the Division Street Bridge, as seen from the Main Street Bridge, June 1980.
Colour slide showing construction beginning on the west bank of the canal for the Division Street Bridge, as seen from the Main Street Bridge, June 1980.
Black and white photographic print showing construction blasting at Ramey's Bend to allow water into dry cut of Welland Canal, Port Colborne, c. 1927-1932.