The board of directors of Denver’s Regional Transportation District approved last month a public-private partnership consortium’s $2.085-billion proposal to build and operate 44 miles of new commuter rail, including a line serving Denver International Airport. Denver Transit Partners is sponsored by Fluor Enterprises Inc., a division of Irving, Tex.-based Fluor Corp., and Australia’s Macquarie Capital Group Ltd. They are joined by partners Ames Construction, Balfour Beatty Rail Inc., Alternate Concepts Inc. and HDR Inc. The proposal came in $300 million lower than RTD’s budget estimate of $2.4 billion for the Eagle P3 project. The bid also promises to open the
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.