Photo: AP/Wideworld Contractors are busy cleaning up after a Midwest blizzard hit Chicago on Feb. 1-2, dumping more than 20 in. of snow. The city’s fleet of more than 250 snowplows could not keep up with the blizzard, the region’s worst since 1967. More than two dozen local firms brought in their own heavy equipment to deal with the deluge. A week later, a fleet of yellow iron and dump trucks was still canvassing the city, plowing roads and trucking away snow. For the workers, it was just another day at the office—the snow might as well have been sand
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.