Five-Span Stone Bridge

Pakenham's five-span stone bridge, one of the Seven Wonders of Lanark County, was built in 1901 by O'Toole and Keating of Ottawa from locally quarried stone, including blocks weighing as much as five tonnes. Its five 12 m. arches and 8-foot-thick piers were designed to withstand crashing ice flows and high spring water levels on the Mississippi River. Measuring 82 m. long, 7.5 m. wide, and 22 feet high, it is the only bridge of its kind on the North American continent.

Ontario · Canada