Based on comments during oral arguments on Dec. 8, the U.S. Supreme Court appears divided on an immigration case that could have far-reaching ramifications for construction companies and other businesses. The case, Chamber of Commerce v. Whiting, is important to construction firms. A Pew Hispanic Center study found that “unauthorized migrants” accounted for 14% of the construction workforce in 2005. At issue in the case is whether an Arizona law imposing sanctions on companies that knowingly hire illegal immigrants is preempted by federal immigration law. States that have similar laws in place or would like to enact such legislation are
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.