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- Q1963239 subject Q7214041.
- Q1963239 abstract "A needle dam is a weir designed to maintain the level or flow of a river through the use of thin "needles" of wood. The needles are leaned against a solid frame and are not intended to be water-tight. Individual needles can be added or removed by hand to constrict the flow of the river, forming a sluice.One early needle dam maintains the level of Lake Lucerne in Lucerne, Switzerland by restricting the flow of the Reuss River, several are still in operation on the Meuse River, France and others were built in the United States in the 19th century.The first needle dam in the United States was completed in 1896 on the Big Sandy River, downstream from the city of Louisa, Kentucky. A similar approach, now known as paddle and rymer weirs, was used since medieval times on the River Thames in England to create flash locks.".
- Q1963239 thumbnail Revin_Meuse_weir_20041230-_024.jpg?width=300.
- Q1963239 wikiPageExternalLink watch?v=wWRXj0kUPYQ.
- Q1963239 wikiPageWikiLink Q1066997.
- Q1963239 wikiPageWikiLink Q142.
- Q1963239 wikiPageWikiLink Q14381.
- Q1963239 wikiPageWikiLink Q19686.
- Q1963239 wikiPageWikiLink Q21.
- Q1963239 wikiPageWikiLink Q2334686.
- Q1963239 wikiPageWikiLink Q2576196.
- Q1963239 wikiPageWikiLink Q30.
- Q1963239 wikiPageWikiLink Q4015.
- Q1963239 wikiPageWikiLink Q4191.
- Q1963239 wikiPageWikiLink Q41986.
- Q1963239 wikiPageWikiLink Q610559.
- Q1963239 wikiPageWikiLink Q7214041.
- Q1963239 comment "A needle dam is a weir designed to maintain the level or flow of a river through the use of thin "needles" of wood. The needles are leaned against a solid frame and are not intended to be water-tight.".
- Q1963239 label "Needle dam".
- Q1963239 depiction Revin_Meuse_weir_20041230-_024.jpg.