Jonathan B. Jarvis, who has spent 33 years at the National Park Service, has been approved as the new NPS director. Jarvis, whom the Senate confirmed on Sept. 24, has led the NPS Pacific West region for the last seven years. The park service’s 2009 construction appropriations were $233 million, excluding emergency funding. NPS also has $750 million in American Recovery and Reinvestment Act funds for repairs and upgrades.
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.