New Port Mann Bridge (Surrey - Coquitlam, BC)

Discussion in 'Buildings, Architecture & Infrastructure' started by officedweller, Feb 5, 2009.

  1. officedweller

    officedweller Senior Member

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    New 10 lane span instead of twinning the existing bridge:

    Vancouver Sun Gallery:
    http://www.vancouversun.com/Gallery+Port+Mann+Bridge+widening+announced/1253899/story.html

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    Existing bridge:
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    Cape Horn interchange:

    Additional render:

    http://www.ibtengineers.com/PROJECTS/PortMann/portmann-1.html
     
    Last edited: Sep 29, 2010
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  2. CDL.TO

    CDL.TO Moderator

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    I'm very impressed by the Campbell government's willingness to invest in infrastructure.
     
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  3. Whoaccio

    Whoaccio Senior Member

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    ^
    Its worth noting that much of Vancouver's "transit community" is up in arms about this.

    Then again, these are the same people that opposed the Canada Line on the grounds it moves faster than 10km/h, putting it firmly in the same camp as Ronald Reagan and Lincoln Navigators.
     
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  4. Long Island Mike

    Long Island Mike Senior Member

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    New Port Mann Bridge-something like Boston's Bunker Hill Bridge...

    O-D and everyone: Interesting info on BC constructing a new bridge instead of improving an older 60s-built bridge here-it reminds me somewhat of Boston's Bunker Hill Bridge that was constructed over the Charles River as part of the Big Dig project-a boondoggle that had delays and cost overruns galore.

    Hard decisions are being made here-by constructing a expensive new bridge instead of renovating older infrastructure. I noticed that transit advocates are protesting this-and can this new bridge either be built with or carry a future Skytrain line?

    As infrastructure gets older sometimes a new bridge is the way to go-like building a entirely new part of the San Francisco-Oakland Bay Bridge(the East Bay section) or what is being considered by the NY Thruway for the Tappan Zee Bridge over the Hudson River Downstate-a extensive renovation of the existing bridge or an entirely new bridge which would include a Metro-North Commuter Railroad line between Westchester and Rockland Counties,NY as good examples of this.

    I noticed that tolls would fund this major project-a necessary evil here.
    I am all for transportation improvments in most any way but the big question can we AFFORD the major cost of new construction?

    -Thoughts and opinion from LI MIKE-
     
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  5. officedweller

    officedweller Senior Member

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    In this case the reasoning is that since the public private partnership grants the private operator a 35 year operating and maintenance contract, when the private operator hands the infrastructure back to the Province in 35 years, the old bridge will be 75 years - basically at the end of its useful lifespan - and that means that the whole "twinning" exercise will have to be repeated - to replace the older span. This provides a "savings" at the end of the 35 years by not having to replace the older span at that time.

    The estimated costs of maintenance on the old bridge are $180 million.
    The estimated increase in the cost of the new bridge to change it from 5 lanes to 10 lanes is $380 million.
    The cost of a new 5 lane bridge in 35 years to replace the old bridge would probably be $1 billion (comparable to the original estimate for the original 5 lane concept).

    News reports say that an LRT line can be underslung under the bridge deck rather than having to remove the HOV lane to do so.

    Note that the new bridge is divided into collector and express lanes - in that respect, it will function as a through routed expressway bridge as well as a collector lane / arterial road / local traffic bridge. Much of the traffic on the bridge is local traffic between Surrey and Coquitlam that if forced to use the freeway because there is no local arterial road bridge across the river.

    The naysayers are primarily in the City of Vancouver and the City of Burnaby who do not want commuter traffic routing through residential areas - essentially a city vs suburbs argument - even though only something like 20% of the bridge traffic even goes to downtown Vancouver.

    The following figure is an excerpt from a 2004 TransLink report on travel characteristics of Highway 1 traffic:

    http://www.livableregion.ca/pdf/port_mann_8percent_trucks.pdf

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    Last edited: Feb 6, 2009
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  6. adma

    adma Superstar

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    Though in both those cases, the existing bridges are ugly-duckling cantilever trusses, whereas I can't see a lot of people regarding Port Mann's bowstring arch as expendably unsightly. (Expendably obsolete is another matter.)
     
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  7. officedweller

    officedweller Senior Member

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    The Loma Priada (sp?) quake in 1989 sealed the fate of the east spans of the Bay Bridge.
    Asthetics don't factor into the equation. Some people have been commenting - another cable stayed bridge? [i.e. Alex Fraser, SkyBridge, North Arm Bridge, Golden Ears Bridge, Pitt River Bridge]

    Videos here of both the Port Mann Bridge/Hwy 1 project and the South Fraser Perimeter Road:

    http://www.th.gov.bc.ca/gateway/info_centre/multimedia.htm
     
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  8. adma

    adma Superstar

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    Well, they do, sort of--after all, there are reasons why all the postcard views have focussed upon the west-bridge suspension spans rather than the east-bridge cantilever truss. It was *always* the ugly duckling.

    Even if Loma Prieta "sealed the fate", it also provided a providential alibi for addressing an aesthetic defect, much as it did for the demolition of the Embarcadero Freeway...
     
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  9. officedweller

    officedweller Senior Member

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    Apparently the footings of the cantilevered span of the Bay Bridge weren't piled down properly, so even if they wanted to, it couldn't be earthquake-proofed.
     
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  10. officedweller

    officedweller Senior Member

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    Note the "asthetics don't factor" comment related to the Port Mann bridge versus its cable-stayed replacement (the comment is oddly truncated as quoted).
     
    Last edited: Feb 7, 2009
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  11. adma

    adma Superstar

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    I know; I was just stating how they factored more with the East Bay Bridge, quake or no quake, structural issues or no structural issues. (You seemed to imply that they did not factor at all *there*, either.)

    The worst that can be said about Port Mann is that even its bowstring has a certain 60s superhighway blandness to it. (Well, I guess just like a cable-stayed replacement has a certain modern-day superhighway blandness to it.)

    Come to think of it--though our lack of similarly wide-spannable waterways may be a factor--I find it interesting that the cable-stayed phenomenon has yet to hit Ontario. (Correct me if I'm wrong.)
     
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  12. officedweller

    officedweller Senior Member

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    Last edited: Feb 7, 2009
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  13. officedweller

    officedweller Senior Member

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    Last edited: Mar 1, 2010
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  14. Hipster Duck

    Hipster Duck Senior Member

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    Vancouver is digging tunnels and throwing up bridges like it's nobody's business. This is their 1962-1977 moment.
     
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  15. officedweller

    officedweller Senior Member

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    Webcam pics from today - West Tower rising above water, East Tower rising above the existing Port Mann Bridge deck:

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