West Coast solar power could get a major boost if the California Energy Commission approves as many as six of 13 proposed utility-scale solar projects in Southern California’s Mojave Desert by year-end. Photo: Courtesy Brightsource Energy Mirror arrays collect Southern California sunshine and convert water to steam to drive generators. Other systems under consideration use thin-film compounds and waterless thermal troughs. At a series of meetings in October and November, the CEC will consider authorizing construction for some of the largest solar installations since 354 MW went online in the 1990s. An additional 3,500 MW of capacity—an estimated $18 billion
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.