Hudsonville, Mich.-based Lamar Construction, a 280-employee firm specializing in government, health-care and educational facilities, discontinued its construction operations in early July, resulting in 180 job losses. A company statement issued on July 9 cited “current economic conditions” for the closure, which included operations in Colorado and Kentucky. Lamar indicated it would continue operation of its structural-steel division. The company reported revenues of $151 million in 2013, $180.2 million in 2012 and $217.8 million in 2011. It ranks at No. 355 on ENR's list of the Top 400 Contractors, although that was a drop from its No. 308 position in the
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.