Related Links: Imagining Construction's Future We were rising now, slowly, through the Central Lift Building. The WinSteel walls of the elevator gave a bizarre voyeur's view of the guts of the structure. Layers of steel beams sandwiched themselves between wood-paneled lobbies and art-deco hallways. The building seemed designed to mask modernity in a comforting nostalgia. It felt as if it had been there for hundreds of years. It felt stable, permanent and safe. I knew it to be almost brand-new; in fact, there were entire sections of the interior that remained unfinished. These sections were far from the view of
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.