House Transportation and Infrastructure Committee chairman John Mica (R-Fla.) on May 26 outlined a high-speed rail (HSR) proposal that would offer an alternative to the $117-billion, 30-year version unveiled by Amtrak last September. Although both plans offer opportunities for private investment, Mica’s proposal goes much farther—essentially transferring from Amtrak to the private sector the responsibility to develop HSR along portions of the congested Northeast Corridor.Mica only presented an outline with few details. But he said his proposal, which he plans to incorporate into legislation within the next few weeks, would allow for public-private partnerships to design, build, operate, maintain and
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.