.@SkanskaUSA plans to use "ground freezing" to minimize impacts of #1stStTunnel project: http://www.youtube.com/watch?v=iAQn0dPx7Tk&feature=youtu.be … (VIDEO) #BloomingdaleDC
11:44 AM - 10 Jan 14http://www.youtube.com/watch?v=iAQn0dPx7Tk&feature=youtu.be
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