Just over a year into a long-term partnership with the U.S. Dept. of Energy to transform Hawaii into a model clean-energy economy, 1,000 MW of alternative-energy projects are in the works along with an undersea-cable transmission project to deliver power among the state’s islands. One goal of the partnership is to offer Hawaii’s experience as a test bed for island economies globally as they make the transition to clean energy. Photo: Castle & Cooke Hawai’i Castle & Cooke’s La Ola solar station recently began generating 1.2 MW. The Hawaii Clean Energy Initiative (HCEI) was launched in January 2008 with a
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.