Interprovincial Bridge

Alexandra Bridge
The Alexandra Bridge seen from the Ottawa side
Coordinates	45°25′49″N 75°42′16″W / 45.4302°N 75.7045°W / 45.4302; -75.7045Coordinates: 45°25′49″N 75°42′16″W / 45.4302°N 75.7045°W / 45.4302; -75.7045
Crosses	Ottawa River
Official name	Royal Alexandra Interprovincial Bridge
Characteristics
Design	truss bridge with five spans
Total length	563.27 m (1,848 ft)
Width	18.89 m (62 ft)
Longest span	main cantilever span: 172.21 m (556 ft)
Statistics
Daily traffic	15,000/day

The Royal Alexandra Interprovincial Bridge is a steel truss cantilever bridge spanning the Ottawa River between Ottawa, Ontario and Gatineau, Quebec. It is known locally as both the "Alexandra Bridge" and the "Interprovincial Bridge".

The bridge was constructed by the Canadian Pacific Railway between 1898 and 1900. Four barges were built to move steel beams into position. During the winter (1899–1900) workmen toiled day and night chopping channels to keep the ice clear for the barges to pass so that work could continue on the superstructure. Considerable construction delays were caused by the severe winter conditions. By September 1900 the four fixed support spans were complete. The Canadian Society of Civil Engineers held its annual meeting in Ottawa in order that its members might tour the bridge works and see the preparations being made for placing the centre span. The bridge's main cantilever centre span was, at the time of construction, the longest in Canada and the fourth longest in the world. Both records are now held by the Quebec Bridge. The centre span was successfully put in place on October 7, and a locomotive made a trial run on December 12, 1900. On February 18, 1901 the bridge was officially inaugurated as the Interprovincial Bridge as it had been built by the Ottawa Interprovincial Bridge Company. The name was changed in September 1901 to the "Royal Alexandra Bridge" in honour of the new Queen during the visit of her son, the Duke of Cornwall and York, later George V.

The Royal Alexandra Interprovincial Bridge crosses the Ottawa River just east of Parliament Hill at Nepean Point in Ottawa. The bridge was designed primarily to carry CPR trains but also had a track for local electric trolley service between Ottawa and Hull, as well as a lane for carriage traffic. During the late 1950s the bridge was upgraded to carry vehicular and pedestrian traffic. The closure of Ottawa Union Station in 1966 saw the last passenger trains use the Royal Alexandra Bridge and the railway tracks were removed as the bridge became exclusively a vehicular-pedestrian bridge.