Related Links: Imagining Construction's Future There was a certain solitude in the site. Teri felt it penetrate her like the cold. The mound held many questions for her, and not only for her, but for all who had visited it—in the recent past as well as in ancient times. Who built the mound? How? Why? When? But then she heard the news about the discovery of the tablets. Now there was some real hope for a revelation as to how the mound was constructed and to the multitude of other questions surrounding the earthen mound before her. Teri had grown up
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.