From the vantage point of a helicopter hovering 1,000 ft above an ocean of heavy equipment, the Ritchie Bros. yard in Davenport, Fla., looks like a giant sandbox flooded with construction toys. In between the neatly arranged rows of excavators, loaders, dump trucks and cranes are colorful dots—men, women and children—weaving in and out of aisles in search of a bargain. In the center of the action is a white building where buyers are sitting comfortably in jeans Slide Show Photo: Tudor Van Hampton / ENR Auction in Orlando was stuffed with thousands of pieces of yellow iron. Related Links:
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.