The Maryland Energy Administration encouraged wind-energy developers on Sept. 15 when it issued a request for expressions of interest for future projects. “We have very significant wind off the Maryland coast, and we want to look into cost-effective ways to build offshore wind parks,” says Malcolm Woolf, agency director. The state seeks information to assist it in developing options, including financing, technologies, water depths and preferred capacities, he says. However, Maryland won’t consider wind parks in the Chesapeake Bay, Woolf says. He adds it could take at least two years before construction could start on the first offshore wind park.
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.