Ten current construction supervisors and one recent retired official of Consolidated Edison, the utility serving Manhattan and its northern suburbs, were arrested Jan. 14 for soliciting and accepting more than $1 million in kickbacks from a construction contractor since 2004. Work involved in the bribery scheme also included cleanup and repair of an underground steam pipe that exploded in Manhattan in July 2007, killing one pedestrian, injuring others and causing millions of dollars in damage. Photo: AP Repair of steampipe that exploded in Manhattan in 2007 was among work that bribe contractor handled. Officials in the office of U.S. Attorney
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.