Jump to content

Navigable aqueduct: Difference between revisions

From Wikipedia, the free encyclopedia
Content deleted Content added
Line 17: Line 17:
[[File:Trogbrücke Magdeburg.jpg|thumb|right|The Magdeburg Water Bridge seen from the shores of the [[Elbe]]]]
[[File:Trogbrücke Magdeburg.jpg|thumb|right|The Magdeburg Water Bridge seen from the shores of the [[Elbe]]]]
* [[Barton Swing Aqueduct]] is a [[swing bridge]] that carries the [[Bridgewater Canal]] across the lower [[Manchester Ship Canal]]. A {{convert|234|ft|m|abbr=on}} section of the aqueduct rotates through 90 degrees to allow vessels to pass along the Ship Canal.
* [[Barton Swing Aqueduct]] is a [[swing bridge]] that carries the [[Bridgewater Canal]] across the lower [[Manchester Ship Canal]]. A {{convert|234|ft|m|abbr=on}} section of the aqueduct rotates through 90 degrees to allow vessels to pass along the Ship Canal.
* [[Veluwemeer Aqueduct]] is a 25-meter long navigable aqueduct located over [[Veluwemeer]] lake in [[Harderwijk]], Netherlands. It was opened in 2002 and bypasses the [[Provincial_road_N302_(Netherlands)|N302 road]].
* [[Veluwemeer Aqueduct]] is a 25-meter long navigable aqueduct located over [[Veluwemeer]] lake in [[Harderwijk]], Netherlands. It was opened in 2002 and bypasses the [[Provincial_road_N302_(Netherlands)|N302 road]].<ref>https://interestingengineering.com/the-netherlands-unique-water-bridge</ref>
* An aqueduct near [[Roelofarendsveen]], [[Netherlands]] (1961) ({{Coord|52|12|55.96|N|4|37|35.46|E}}) carries the [[Ringvaart]] [[canal]] over the A4 [[highway]] and the [[HSL-Zuid]], which are situated on land below the level of the canal (and below sea level).
* An aqueduct near [[Roelofarendsveen]], [[Netherlands]] (1961) ({{Coord|52|12|55.96|N|4|37|35.46|E}}) carries the [[Ringvaart]] [[canal]] over the A4 [[highway]] and the [[HSL-Zuid]], which are situated on land below the level of the canal (and below sea level).
* Gouwe aqueduct, near [[Gouda, South Holland|Gouda]] in the [[Netherlands]], carries the [[Gouwe (river)|Gouwe]] [[river]] over the A12 highway, which is on land below the level of the river.
* Gouwe aqueduct, near [[Gouda, South Holland|Gouda]] in the [[Netherlands]], carries the [[Gouwe (river)|Gouwe]] [[river]] over the A12 highway, which is on land below the level of the river.

Revision as of 18:07, 19 April 2021

Narrowboat crossing the World Heritage Pontcysyllte Aqueduct in Wales

Navigable aqueducts (sometimes called water bridges) are bridge structures that carry navigable waterway canals over other rivers, valleys, railways or roads. They are primarily distinguished by their size, carrying a larger cross-section of water than most water-supply aqueducts. Although Roman aqueducts were sometimes used for transport, aqueducts were not generally used until the 17th century when the problems of summit level canals had been solved and modern canal systems were developed. The 662-metre (2,172 ft) long steel Briare aqueduct carrying the Canal latéral à la Loire over the River Loire was built in 1896. It was ranked as the longest navigable aqueduct in the world for more than a century, until the Magdeburg Water Bridge in Germany took the title in the early 21st century.

Early aqueducts such as the three on the Canal du Midi had stone or brick arches, the longest span being 18.3 metres (60 ft) on the Cesse Aqueduct, built in 1690. But, the weight of the construction to support the trough with the clay or other lining to make it waterproof made these structures clumsy. In 1796 Longdon-on-Tern Aqueduct, the first large cast iron aqueduct was built by Thomas Telford at Longdon-on-Tern on the Shrewsbury Canal. It has a total length of 57 metres (187 ft) across three intermediate piers. Within ten years Telford had completed the far more ambitious Pontcysyllte Aqueduct in Wales on the Llangollen Canal over the River Dee valley, with a total length 307 metres. Other cast-iron aqueducts followed, such as the single-span Stanley Ferry Aqueduct on the Calder and Hebble Navigation in 1839, with its innovative 50-metre (160 ft) through arch design.

Notable navigable aqueducts

Out-of-use cast-iron Longdon-on-Tern Aqueduct
The Magdeburg Water Bridge seen from the shores of the Elbe

See also

References