The Obama Administration’s decision to open up offshore oil and gas development in the Middle and Southern Atlantic states, new areas of the Eastern Gulf of Mexico and the Arctic Ocean is winning praise from oil and gas industry officials. They say the development could provide thousands of new jobs for contractors in those regions. On March 31, Interior Secretary Ken Salazar said land in those offshore regions could be leased for oil and gas development beginning in 2012 if there is interest from industry and if development can be done in an environmentally responsible manner. Development off California’s coast
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.