Despite improperly placed concrete and a software design issue, the Rhode Island Dept. of Transportation and its contractor are anticipating that construction of the new $163.7-million Sakonnet River Bridge will stay on budget and on schedule. Photo: Courtesy RIDOT Contractor is repairing errors in concrete pours and girder design. The Sakonnet Bridge, a 2,065-ft steel-truss bridge, carries nearly 40,000 cars per day on Routes 24 and 138 between Portsmouth and Tiverton in eastern Rhode Island. Weight limits have been reduced to 18 tons, which leaves out large trucks. Construction of the replacement, a steel-tub-girder design, began in 2009, with completion
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.