Federal funding for surface transportation projects should migrate from a petroleum-fuel-based tax to a mileage-based user fee by 2020, says a 15-member commission appointed by Congress in 2007. The bipartisan group released its final report on Feb. 25 with suggestions for overhauling the Highway Trust Fund, due for its six-year reauthorization later this year. Photo: The DOT LaHood says no fuel tax hike. The National Surface Transportation Infrastructure Financing Commission includes financial experts, lawyers, politicians and industry leaders. Geoffrey Yarema, a member and a partner with Nossaman LLP, Los Angeles, a law firm specializing in infrastructure, says the group’s conclusions
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.