A regional economic development corporation in Ohio seeks to install the first freshwater offshore wind turbines in the U.S., in the Great Lakes. Cleveland-based Lake Erie Energy Development Corp. (LEEDCo) announced May 24 a long-term partnership agreement with General Electric Co. to supply turbines for LEEDCo’s first 20-MW wind farm in Lake Erie near Cleveland, set to operate in 2012. A 1,000-MW wind farm in the lake is planned for about 2020. LEEDCo has received three responses to a request for proposals for a developer. It expects to announce that partner this month, says Treasurer Richard Stuebi.
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.