Design firm HNTB, Kansas City, Mo., and contractor Walsh Construction, Chicago, have been awarded a design-build contract from the Ohio Dept. of Transportation to construct the first of two new spans that together will become Cleveland’s new Innerbelt Bridge. The twin-structure bridge will replace the existing 51-year-old, single-structure Innerbelt Bridge, which will be demolished. The firms’ work on the five-lane $278.4-million first span is expected to begin next spring and be completed by fall 2013. Construction of the eastbound section will be a separate contract awarded after the westbound span is completed.
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.