Heading into the summer bargaining season, the goodwill created between New York City contractors and construction unions during landmark labor negotiations in 2009 appears to be spent. Labor bosses are crying foul over an employer campaign aimed at reducing the gap between union and open-shop rates. Photo: For ENR By Michael Falco New York building firms’ rep Coletti (left) and union head LaBarbera in 2009 after inking pact to cut costs. Relations now are strained. Rather than working exclusively with union trades representatives, the Building Trades Employers’ Association, which represents about 1,700 contractors citywide, is reaching out directly to rank-and-file
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.