Related Links: Imagining Construction's Future CHAPTER ONEHe smelled the rank odors of oil and aging garbage as he laid facedown in the dark. His ear was pressed against the floor, and he no longer heard the constant hum of the tunnels exhaust systems, which meant he was no longer in Level F3. The ground turbulence and rumble of an automobile engine suggested he was in a primitive form of travel."F1?" he thought.His natural instinct was to panic, but he did not have the luxury of being himself, so he moved to induction. His body failed to respond as he struggled
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.