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}} The Glimmer Glass Bridge is a bridge located in Manasquan, in Monmouth County, New Jersey, United States. It carries traffic from Brielle Road over the Glimmer Glass, a navigable tidal inlet of the Manasquan River, from Brielle to Manasquan. It is owned by the County of Monmouth. == History == The Glimmer Glass Bridge was built in 1898. It is a cable lift bascule bridge, using a rolling counterweight design and is technologically and historically significant as the only example of its type in New Jersey.〔(Glimmer Glass Bridge: Historical and Technological Significance ), Preservation New Jersey. Accessed July 22, 2007.〕 It may also be the only example in the eastern half of the United States. ''Scientific American'' in an 1896 issue described a recently completed nearby bridge on the Erie Railroad on its main line over Berrys Creek near Rutherford, New Jersey:
The principle is to use a curved track and rolling counterweights where the work expended in raising the leaf is equal to the energy released by the falling counterweight. The toe end of the movable span is linked by cables to cylindrical rolling counterweights. The connecting cable passes over a tower column with a curved track. Moving the counterweights along the curved track thus raises or lowers the bridge. The work expended in raising the leaf is equal to the energy released by the falling counterweight. The toe end of the moveable span is linked by cables to cylindrical rolling counterweights.〔(New Jersey Historic Bridge Data Glimmer Glass Bridge ), A. G. Lichtenstein & Associates, Inc.. Accessed October 14, 2014.〕 The rolling counterweight single-leaf bascule bridge with a deck girder movable leaf is the only example of the late 19th-century bridge type in the state of New Jersey and possibly the entire country.〔(Glimmerglass Road Bridge ), Connolly & Hickey Historical Architects. Accessed October 14, 2014.〕 It was, at the time, a popular design for railroads in New Jersey for spanning canals. The bridge has been rebuilt several times. The wood tower column and track were redone in 1957 and 1971, and the steel grid deck on the ca. 1950 deck girder movable span was installed in 1962. However, the integrity of the original design has been maintained and it operates in the original manner.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Glimmer Glass Bridge」の詳細全文を読む スポンサード リンク
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