As the American Recovery and Reinvestment Act nears its one-year anniversary, waste-cleanup firms anticipate another year of backlog boosts. But their peers in the water and wastewater infrastructure sector hope a U.S.-Canada agreement signed on Feb. 5 will ease “Buy American” tensions that have been dogging progress of their stimulus-funded work. Photo: Courtesy of PCL Design firms and contractors have seen few ARRA drinking-water and wastewater projects. Georgia, Minnesota and Wisconsin have put nearly all their ARRA-financed water projects out for bid, but work in other states is being held up by the ‘Buy American’ requirement. Related Links: As Federal
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.