With bids due soon for an estimated $8.7-billion tunnel project between New Jersey and Manhattan, the governor of New Jersey has announced tough new measures to control costs and potential fraud. Seeking to "ensure transparency and accountability" in the effort to build a new commuter rail link under the Hudson River, New Jersey Gov. Jon Corzine (D) issued an executive order Oct. 7 that mandates more state oversight of "spending and contracting." As the country's largest transit public works endeavor, the project will involve construction of two commuter rail tracks and require 21,000 feet of tunneling. Set for completion 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.