The amount of American Recovery and Reinvestment Act-financed projects under contract in highways and other infrastructure sectors is slowly rising closer to the 100% mark, the House Transportation and Infrastructure Committee's latest update on the economic-stimulus measure shows. With the ARRA programs now in the 18th month since the measure was signed, the month-to-month gains in funds under contract are modest. The committee's latest monthly stimulus scorecard, released Aug. 26, says that of the $38 billion that ARRA allocated for highway, transit and wastewater-treatment programs under the panel's jurisdiction, $34.1 billion, or 90%, was under contract as of July 31.
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.