As outlines of new House and Senate transportation bills come into sharper focus, it is clear the construction industry will be hard-pressed to get even a small federal funding boost above current levels for highways and transit. That outcome would be another blow to construction firms bracing for the end of the federal stimulus program and enduring spending cuts by state and local transportation agencies.Two plans are on the table. House Transportation and Infrastructure Committee Chairman John Mica (R-Fla.) on July 7 formally unveiled a $230-billion, six-year transportation framework. In the Senate, Environment and Public Works Committee Chairman Barbara Boxer
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.