The Los Angeles Dept. of Water and Power is developing a plan to turn the dusty dry lake bed of Owens Valley, Calif., into an 80-sq-mi, 5-GW solar park. The sea of photovoltaic cells could serve a double purpose, also helping the agency’s efforts to mitigate dust and alkalinity problems. Since 2000, DWP has spent more than $500 million trying to comply with federal clean-air standards to calm the dust from the dry lake bed, which is stirred by local wind conditions that can reach up to 60 mph. Some think the low, densely spaced solar panels could act as
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.