Features
By Daniel A. Sesil, P.E., M.ASCE, Douglas P. González, P.E., M.ASCE, and Matthew D. Melrose, P.E.
Situated prominently on Pennsylvania Avenue in the nation’s capital, the new Newseum stands as a bold icon not only for the city but also for the American people and, indeed, the entire world. Conceived as an architectural expression of the First Amendment and a free press, the building is the realization of an unusually complex structural scheme that evolved from thoughtful dialogue between the architects and the engineers.
By Daniel Horgan, CEng, and Christian Ingerslev, P.E., CEng, F.ASCE
Located at the bottom of the Bosporus, a 58 m deep immersed tunnel—the deepest tunnel of its kind in the world—is expected to open by 2013, connecting the European and Asian sides of Istanbul via rail. The 1.4 km long tunnel is the centerpiece of a $3.5-billion project that includes 9.8 km of bored tunnels, 3 new underground stations and 37 grade-level stations, and improvements to a rail line that ultimately will run for 76 km.
By Glenn Dostal, P.E., and Kevin Tobin, P.E.
The recent completion in Omaha, Nebraska, of the 100 mgd (378 ML/d) Platte West Water Treatment Plant and its associated well field is the culmination of decades of planning by the owner of the facilities, Omaha’s Metropolitan Utilities District. The $352-million effort is expected to supply Omaha with high quality drinking water for decades to come.
By Ben Arndt, P.E., P.G., M.ASCE, and Joseph Colley, P.E.
To create a passing lane on a steep, two-lane highway on a landslide-prone hillside in Colorado, engineers employed soil nail retaining walls and mechanically stabilized earth walls supported by very long micropiles.
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Keith Philpott/HDR, Inc., left |
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Courtesy of the Mount Washington Cog Railway, top right; Ben Arndt/YEH and Associates, middle left; National Science Foundation, middle right; Courtesy of the Alter Group, bottom right |
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