I classified this as a trunnion bridge because the span does pivot on a trunnion. But I added the label "bridgeRare" because it doesn't use the usual counterweight design.
He doesn't fly the drone on the other side where we would have a clear view of the curved ramp.
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| Metrotrails posted The Glimmer Glass Drawbridge is one of the only counterweight draw bridges of it's kind, located near the Manasquan Inlet, a section known as the "Glimmer Glass" at the Jersey Shore. The cable lift Bascule bridge featuring rolling counterweight design was built in 1898, and may be the only surviving bridge of its kind in the eastern US. The Glimmer Glass is a navigable, tidal channel of the Manasquan River between Manasquan and Brielle, Monmouth County NJ. Metrotrails shared |
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| Street View, Feb 2022 |
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| Street View, Aug 2017 |
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| Street View, Feb 2022 |
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| 2009 Ben Eriksen Flickr via Bridge Hunter, License: Creative Commons Attribution-NonCommercial (CC BY-NC) "A VERY Tight Fit" |
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| HistoricBridges, Photo credit: Elaine Deutsch, 2016 "Bridge Status: At risk for demolition and replacement." The 279' (85m) long bridge has a movable span of 34' (10.4m). "This is the last known surviving example of a Belidor type bascule bridge in the country. Despite never being common here, this bascule type was also built in Australia where they called it the 'American' type of bascule bridge which is ironic since the type is nearly extinct in the United States today." |
He doesn't fly the drone on the other side where we would have a clear view of the curved ramp.
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| Photography By Gregory Coraggio 5:29 drone video via HistoricBridges |
The 17-span bridge is composed of 16 timber stringer spans supported on braced timber pile bents and a 31'-long cable lift bascule rolling counterweight movable span. The single-leaf movable span is a deck girder with an open steel grid deck installed in 1962. A cable attached to each side of the toe end of the movable leaf passes over a single-track sheave atop the braced timber tower columns with braced curved tracks on the side opposite the movable leaf. The opposite end of the cable is attached to a connecting hanger that joins the shafts of the rolling counterweights positioned in series on the track. The two topmost metal counterweights have a solid center guide while the last one has disk guides. The track has built up wood end stops. The tower columns are braced with wood struts on the sides and wire rope stays on the back. The toe lock is manual. The bridge is controlled from an operators house on the upstream side. An electric motor mounted atop the upstream tower column brace engages the drive shaft to turn the sheaves which cause the counterweights to start moving down the track. The motor reverses the action to close the bridge. The operators house, like many elements of the bridge, has been upgraded over the years, but its function and profile are original.History: Bascule span installed 1938; bridge modified in 1949-50, 1957-58, 1963, and 1971[ArchivedBridgeHunter]
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