Friday, June 25, 2010

Cable-Stayed Bridges - New Port Mann Bridge (2)

Another less than perfect photo from inside a bus, but at least we can see the towers going up beside the longest arch bridge in Canada, the soon to be demolished old Port Mann Bridge. This is one of those tied arch bridges with half arches for side spans. I wonder if the main span was carried to the site and set onto the side spans?

The new Port Mann Bridge will be 7200 ft long, 10 lanes wide, and with the same vertical clearance as the existing bridge. The main span will be 1540 ft long, making it only 6 ft shorter than the longest cable-stayed bridge in North America (the previously studied Arthur Ravenel (Cooper River) Bridge). The side spans will be 620 ft long. The bridge costs about $3 billion and replaces a 46 year old bridge. Is that a good thing or a bad thing?
Creative Commons License
Cable-Stayed Bridges - New Port Mann Bridge (2) by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License.

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