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Thread: Hoover Dam By-Pass

  1. #1
    Disgruntled Optimist lofter1's Avatar
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    Default Hoover Dam By-Pass

    A major bridge is under construction to allow traffic to by-pass the existing two-lane road that traverses the Hoover Dam.

    From the website: http://www.hooverdambypass.org/ :
    The Colorado River Bridge is the central portion of the Hoover Dam Bypass Project. Construction on the nearly 2,000 foot long bridge began in late January 2005 and the completion of the entire Hoover Dam Bypass Project is expected in June 2008. When completed, this signature bridge will span the Black Canyon (about 1,600 feet south of the Hoover Dam), connecting the Arizona and Nevada Approach highways nearly 900-feet above the Colorado River. Use the web cam icon to the left, to see real-time images of construction on the bridge!

    United States Highway 93 (U.S. 93) has been designated a North American Free Trade Agreement (NAFTA) route. The increasing congestion caused by the switchbacks leading to the Hoover Dam site and the restrictions at the dam crossing have led to the development of the Hoover Bypass Project. The Hoover Dam Bypass Project is a 3.5-mile corridor beginning at approximately milepost 2.2 in Clark County, Nevada and crossing the Colorado River approximately 1,500 feet downstream of the Hoover Dam, then terminating in Mohave County, Arizona near milepost 1.7 on U.S. 93.
    Construction photo from July 2005:


    Excavation with Link Belt TG1900 tower crane (looking west)


    The proposed Bridge now under construction:


    A major project milestone has been reached with the selection of the bridge type
    for the Colorado River Crossing.





    The Site:


  2. #2
    Moderator NYatKNIGHT's Avatar
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    Default

    Should help the traffic jam usually piled up on each side. But people will want to stop in the middle to take pictures - the view of the dam is already dramatic from lesser vantage points - unless they have a pull-off on the bridge there could be the same traffic problems.

  3. #3

  4. #4

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    I watched a show (maybe Build it Bigger) that covered the day the construction crew poured one of the footings for the bridge. They had the absolute worst luck. The cement originally failed the slump test. They fixed that, but then the cement was too hot to pour so they had to pump it with liquid nitrogen. As they started pouring a lightning storm rolled in and late in the night a worker got injured and had to be hauled out of the canyon. They got the job done though.

  5. #5
    Forum Veteran Dr.T's Avatar
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    It was a titanic work. The bridge is not beautiful, but the building program continued in the implementation is truly spectacular. In engineering, the bridges do not have to be beautiful, but meet the criteria of functionality and the public interest and, therefore, I think the Colorado River Bridge is a work worthy to deserve the applause of all. Build a structure of that size in an area as hostile as the Colorado River seems easy watching videos, but the reality is very different.

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