File:Crossing Plaza Bridge Over Rideau Canal, Ottawa, Ontario (29442127813).jpg

The Plaza Bridge in Ottawa, Ontario, Canada, is an automotive and pedestrian bridge that crosses the Rideau Canal just south of the Ottawa locks. It joins Wellington Street and Elgin Street in the Downtown core to the west with Rideau Street to the east. The Chateau Laurier abuts the bridge at the east end, while Parliament Hill is just beyond the west end. It is the northernmost bridge over the canal, just north of the Mackenzie King Bridge.

The bridge is constructed of three masonry spans. The western span is over a roadway along the western bank of the Canal. The central span is over the Canal. The eastern span is over a former railway tunnel running along the east bank of the Canal.

The Plaza Bridge replaced two bridges across the Canal, the Sappers Bridge and the Dufferin Bridge. Construction on the new Plaza Bridge was finished by December 1912.

Several buildings, including the Russell Hotel and Ottawa's first City Hall, existed in the place of today's National War Memorial. In the 1930s, the memorial was erected and Elgin Street was rerouted around the Cenotaph, southbound traffic along the west side of the square and the northbound section along the path of the southern bridge. The bridge was also widened at that time.

In the 1990s, the bridge structure was renovated, adding an extra access to the canal via a staircase in the area between the original two bridges.[6]

The Sapper's Bridge memorial was erected by the Canadian Military Engineer Centennial 1903-2003 Committee and the National Capital Commission. The plaques, which were unveiled on April 29, 2004, are dedicated in honour of a century of contributing service by Canadian Military engineers.

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