A recent U.S.-Canada trade agreement that attempts to resolve a dispute over the American Recovery and Reinvestment Act’s “Buy American” provisions will provide some help for water and wastewater companies in both countries, but in many ways it is too little, too late, industry sources say. + Image The agreement, which took effect on Feb. 16, waives the Buy American requirements for ARRA-funded contracts awarded through September 2011 that use components manufactured in Canada. On both sides of the border, the Buy American spat has been of keen interest to water and wastewater firms, which contend the mandate has unnecessarily
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.