For 108 years, groups representing New York City's union contractors and building trades have worked under the New York Plan for the Resolution of Jurisdictional Disputes, an agreement used to resolve inter-union disputes and bind union contractors to use organized labor. But at year-end, the era comes to a close. The Building Trades Employers Association, which represents union contractors, voted in May to let the plan expire after this year, giving members the option to use non-union workers. Related Links: View the Full ENR 2011 Second Quarter Cost Report (PDF) Contractors Hold Line on Pay How John Deere's New Hybrid
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.