Builders of a 201,000-sq-ft art museum set in a blasted-out ravine in northwest Arkansas knew they would be digging themselves into a hole when they signed on to construct the pet project of Alice Walton, heiress to the Walmart discount chain-store fortune. They were prepared for headaches associated with the job's remote location in Walton's 120-acre forest. They had braced themselves for building structures, dams and ponds in a flood-prone streambed. And they were prepared for architect Moshe Safdie's curved forms and cable-supported roofs. “We were quite intrigued by the cable structures across the creek—which to our knowledge had never
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.