Ford Motor Co. says its new 2011 F-150 pickup truck, available later this year with four new engines, is targeting best-in-class fuel economy with its basic model, popular among construction fleet owners. Ford's base pickup, the 2011 F-150 XL series, will come standard with a 3.7L V-6 gasoline engine, 6-speed automatic transmission and 12-volt electric power steering that help the truck hit up to 23 mpg. Though official testing is still in the works, Ford hopes to certify its new base V-6 engine soon at 23 mpg for highway driving, says Mark Grueber, F-150 marketing manager. Across the board, Ford
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.