Developers of a major offshore wind farm in Massachusetts Bay failed to reach agreement by March 1 with local Native American tribes who say the $1-billion Cape Wind project would destroy ancestral burial sites. The continuing impasse over the 135-turbine project means U.S. Interior Secretary Kenneth Salazar will make a final ruling on its fate by the end of April. Salazar had acted as arbiter between the tribes and project developer Cape Wind Associates, with a self-imposed March 1 deadline. The lengthy permitting process now goes to a Dept. of the Interior agency, the Advisory Council on Historic Preservation, for
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.