Courtesy of Amtrak Rendering of proposed new Union Station train shed, looking south from H Street. Existing historic station would be behind new shed. Related Links: PDF of Amtrak plan summary, press release Amtrak has unveiled an ambitious plan, which would cost $6.5 billion or more, to revamp Washington, D.C.,’s Union Station, adding capacity to handle future passenger traffic, preserving the historic station’s distinctive architecture and seeking to give a boost to the local economy.The expansion and alterations to the station would be literally topped off by 3 million sq ft of new, privately financed office, residential and other buildings,
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.