Photo by Bruce Buckley/ENR Crews at Sparrows Point, Md., are wrapping up six tunnel tubes that will create roughly half of the new Elizabeth River Tunnel. The immersed tube tunnel will link Norfolk, Va., and Portsmouth, Va. Crews for SKW Constructors built the tubes, which each consist of five reinforced concrete sections, in dry dock and installed temporary bulkheads for buoyancy. In June, with the aid of tub boats, the tubes will float 220 miles down the Chesapeake Bay to the construction site.
The former Soviet nation of Kazakhstan is ramping up completion of EXPO 2017—a futuristic megaproject estimated to cost between $3 and $5 billion that will showcase global energy efficiency and boost the host’s global profile
Cover photo by Neelam Mathews in Astana, Kazakhstan