A Lower Manhattan community board in late May approved a planned mosque and Muslim cultural center near the site of the 9/11 attacks. The center would require demolition of a 153-year-old building two blocks from the World Trade Center site. The plan has drawn criticism from families of 9/11 victims. It must still be approved by New York’s Landmark Preservation Commission.
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.