U.S. Interior Secretary Ken Salazar said on Jan. 4 he would meet with stakeholders on the future of the planned $1-billion Cape Wind wind farm in Nantucket Sound after the National Park Service ruled that its planned site is eligible for listing as a national historic site because of cultural significance to two local Native American tribes. The project, located off the Massachusetts coast, would be the country’s first offshore wind farm. It would involve construction of 130 turbines, each 440 ft high, and other structures. Environmentalists and other opponents claim the project, being developed by Cape Wind Associates LLC,
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.