It is not one of Ontario’s most famous bridges, but the Canal Lake Concrete Arch Bridge holds a special place in the history of this country’s concrete structures. Located on the Trent-Severn waterway system between Balsam Lake and Lake Simcoe, it’s affectionately known to summer visitors in the area as the ‘Hole-in-the-Wall Bridge’ because of its appearance: a single arch braced by abutments on either shore.
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