With the latest short-term surface transportation bill set to expire on Dec. 18, another extension is a certainty. But how long the next stopgap measure will be is by no means clear, making things difficult for state transportation agencies and recession-battered construction firms that pursue states’ federally funded highway contracts. Boxer asks for U.S. DOT help in resolving ‘standoff’ with House over new funding bill. Leaders of three Senate committees said on Nov. 17 they want a six-month extension. One of those senators, Environment and Public Works Committee Chairman Barbara Boxer (D-Calif.), has urged top U.S. Dept. of Transportation officials
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.