The nation’s economic downturn has pulled the rug out from under new building and renovation programs at many school districts, colleges and universities. The education construction market has been particularly hard-hit by the collapse of the housing market. The U.S. homebuilding boom, particularly in parts of the Southeast and the Southwest, had been the engine for skyrocketing K-through-12 school enrollment and the resulting need for new schools. Photo: esvants.com Dartmouth’s 175,000-sq-ft life-sciences building is the only current major project at the university. Several other projects have been postponed. Photo: esvants.com California’s troubled economy has led to project delays. Photo: esvants.com
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.