PHOTO COURTESY OF SUNDT CONSTRUCTION INC. A 30-mile project is rapidly adding HOV lanes to a Phoenix-area freeway. Battling monsoons, heat, live traffic and subpar soils, a joint-venture team expects to complete 30 miles of a Phoenix-area freeway expansion in just eight months—adding another reason for the Arizona Dept. of Transportation to embrace design-build as it constructs projects to cope with growing traffic.A team of Kiewit Corp. and Sundt Construction holds the approximately $90-million contract to add 30 miles of high-occupancy vehicle lanes to Loop 101 between state Route 51 and Interstate 10.“To do this many miles in [nine] months
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.