Bascule bridge

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a counterpoise or balanced drawbridge, which is opened by sinking the counterpoise and thus lifting the footway into the air.

See also: Bascule

References in periodicals archive ?
Built in 1909, the bascule bridge was a key piece of infrastructure in the town's worldleading copper industry.
Construction will start at the southern limits of the Phase II project, also being done by Kenny and will extend through the existing bridge houses and across the Chicago River alongside the Lake Shore Drive bascule bridge, in December 2018 and conclude in summer 2020.
Traffic passes over the Bascule Bridge at Stanley Dock, on Regent Road
Built in 1909, the iron and timber bascule bridge linked the Morfa Copperworks on the west bank of the River Towy to the Upper Bank Copperworks on the east side.
"It will include a bridge crossing of the Black Cart and tie in to the bascule bridge over the White Cart." The bridge would connect Abbotsinch Road to land next to All Hallows Church in Inchinnan.
4 to the tripartite agreement with the Louisiana Department of Transportation and Development and the city of New Orleans for the replacement of the bascule bridge. The project would include pre-construction engineering services for the bridges replacement.
2) Rolling bascule bridge carrying a town street over a freshwater commercial waterway
The new plan, a bascule bridge with two Gothic towers and upper pedestrian walkways, was formally adopted with the passing of the Tower Bridge Act of 1885.
Tourists cross the historical Mystic River Bascule Bridge in Mystic, Conn., which was built in 1920.