California’s push to increase renewable energy’s share of the power market is showing results. Construction of the first phase of a new 400-MW solar power project in the California desert will begin in late 2009 once a contractor is named. Photo: Brightsource Energy Inc. Flat mirrors mean lower cost for BrightSource’s solar plant, piloted in Israel’s Negev Desert. Oakland, Calif.-based BrightSource Energy Inc. this year has signed contracts with Rosemead, Calif.-based Southern California Edison Co. and San Francisco-based Pacific Gas & Electric Co. for a total of 2,200 MW of power from seven planned solar plants at locations in California
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.