The value of the U.S. solar power market soared last year as several states, including New Jersey, significantly boosted installed capacity, according to a recent study by the Solar Energy Industries Association and market research firm GTM Research. Federal, state and, in some cases, local incentive programs and funding initiatives helped raise total year-over-year market value 67%, to $6 billion, the study shows. Market news was healthy nationwide as 16 states each installed more than 10 MW of photovoltaics, up from four in 2007. New Jersey, however, already has surpassed that amount and ranks second nationwide, trailing only California in
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.