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A vertical-lift bridge or just lift bridge is a type of movable bridge in which a span rises vertically while remaining parallel with the deck. The vertical lift offers several benefits over other movable bridges such as the bascule and swing-span bridges. Generally speaking, they cost less to build for longer moveable spans. [1]
A bascule bridge (also referred to as a drawbridge or a lifting bridge) is a moveable bridge with a counterweight that continuously balances a span, or leaf, throughout its upward swing to provide clearance for boat traffic. It may be single- or double-leafed.
It is the only double-deck bridge with independent lifts in the world. [22] Murray Morgan Bridge – Steel lift bridge in Tacoma, Washington, notable for its height above water, sloping span, and overhead span to carry a water pipe; closed October 23, 2007.
A moveable bridge, or movable bridge, is a bridge that moves to allow passage for boats [1] or barges. [2] In American English, the term is synonymous with drawbridge , and the latter is the common term, but drawbridge can be limited to the narrower, historical definition used in some other forms of English, in which drawbridge refers to only a ...
The bridge was built by James P. Edward of Fox and Howard Inc. of Chicago. Three local men raised $47,000 in stocks for the toll bridge. Construction began in the spring of 1875 and was finished in the spring of 1876. [9] This was replaced by a steel swing bridge, the Portage Canal Swing Bridge, built by the King Bridge Company in 1895. The ...
The base of the bridge will also be raised to 230 ft., which is a 45-foot increase to accommodate ship traffic. The roadway will still be two lanes wide going in each direction.
The bridge is then rolled off where it unfolds automatically. The bridge spans 382 metres, load capacity 20 tons, or 227 m, load capacity 60 tons, with 32 river pontoons, 12 bridging boats and four shore pontoons. [3] The PMP was superseded by the PPS-84 [4] and later the PP-91 bridge system after the breakup of the Soviet Union. The ...
Gov. Wes Moore revealed the new design of Baltimore's Francis Scott Key Bridge that collapsed into the Patapsco River after being struck by vessel that lost power on March, 26, 2025.