North Carolina Dept. of Transportation officials hope to resume erection work on the $36.6-million Oak Island Bridge project before the end of July, once concerns about cracks found in five concrete girders are alleviated. Work on the bridge halted in early July for the second time in eight months while prime contractor Barnhill Contracting Co., Tarboro, N.C., validates the quality of the suspect girders, four of which were placed. Photo: NCDOT Bulb-tee girders are concern. The bridge is part of a new 4.5-mile-long link connecting Oak Island to the mainland, south of Wilmington in Brunswick County. It consists of 160-ft-long
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.