Federal funding for surface transportation projects should migrate from the traditional petroleum fuel-based tax to a mileage-based user fee by 2020, according to a 15-member commission appointed by Congress two years ago. The bipartisan group released its final report Feb. 25 with recommendations for overhauling the highway trust fund, which is due for reauthorization later this year. The National Surface Transportation Infrastructure Financing Commission includes financial experts, lawyers, politicians and transportation industry leaders such as Elliot Sander, chief executive officer of the New York Metropolitan Transportation Authority, and Jeffrey C. Crowe, chairman of Landstar System, Inc. “We were charged with
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.