Wind energy from north-central Oregon will power homes in Southern California when an 845-MW wind farm is completed in 2012. Turbine supplier GE and developer Caithness Energy LLC say the $2-billion project, with 338 wind turbines sprawling across 30 sq miles near the town of Arlington, Ore., will be the world’s largest operating wind farm. Photo: GE Wind turbines to be installed in Oregon will be GE’s largest in the U.S, but similar machines have been successfully operating for several years in Europe and Asia. Under a $1.4-billion contract, Fairfield, Conn.-based GE will furnish and deliver its newest 2.5-MW wind
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.