Lisvane Reservoir
{{Use dmy dates|date=November 2019}}
{{Infobox body of water
| name = Lisvane Reservoir
| image = Lisvane Reservoir - geograph.org.uk - 1298739.jpg
| caption = Lisvane Reservoir
| image_bathymetry =
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| location = Lisvane, Cardiff, Wales
| coords = {{coord|52.5322|-3.1697}}
| type = reservoir
| inflow =
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|pushpin_map=Wales Cardiff
| date-built = 1886
| catchment =
| basin_countries = Wales, United Kingdom
| length = {{convert|1335|ft|m}}
| width = {{convert|650|ft|m}}
| area =
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| sections =
| cities = Cardiff, Wales
| islands =
}}
Lisvane Reservoir at Lisvane, Cardiff, south Wales is one of several reservoirs constructed as part of the Taff Fawr scheme for supplying water to Cardiff, completed in 1886. It is adjacent to Llanishen Reservoir{{cite book|title=The Sanitary record and journal of sanitary and municipal engineering|url=https://books.google.com/books?id=T3lIAAAAYAAJ|accessdate=2 July 2011|year=1900|publisher=Sanitary Pub. Co.|pages=7–8}} and forms part of the Nant Fawr Corridor from the top of Roath Park to the countryside beyond Cyncoed.
In 1892 the Llanishen Reservoir was reported to be able to hold {{convert|300,000,000|impgal|m3}} of water and the smaller Lisvane Reservoir able to hold {{convert|80,000,000|impgal|m3}}.{{cite book|author=International congress of hygiene and demography. 7th|title=Transactions of the seventh International congress of hygiene and demography ...|url=https://books.google.com/books?id=O6hXAAAAMAAJ|accessdate=2 July 2011|year=1892|publisher=Printed by Eyre and Spottiswoode}}
On 30 August 2013, CELSA Group bought both Llanishen and Lisvane reservoirs from their owner Western Power Distribution, to assure its Cardiff rod mill plant a consistent supply of water.{{cite web|url=https://www.bbc.co.uk/news/uk-wales-23950858|title=Celsa steel buys Llanishen and Lisvane reservoirs|publisher=BBC Wales|date=3 September 2013|accessdate=3 September 2013}}
In January 2016, Welsh Water acquired both Llanishen and Lisvane reservoirs from CELSA Group on a 999-year lease, which allows Welsh Water to use both reservoirs for water supply and recreational purposes while also allowing CELSA UK to continue to take its water supply from the Lisvane reservoir.{{cite news|url=http://www.walesonline.co.uk/news/local-news/victory-last-battle-save-llanishen-10748581|title=Victory at last! Battle to save Llanishen Reservoir finally won after Welsh Water acquires 999-year lease |date=18 January 2016|accessdate=4 April 2016|publisher=WalesOnline}}
In July 2023, the Llanishen and Lisvane reservoirs were fully reopened to the public. Redevelopment works at the site included the construction of a two-storey visitor centre and restaurant, nature trails, and bird hides.{{Cite news |last=Morris |first=Steven |date=2023-07-20 |title='A wonderful moment': Welsh reservoirs to reopen after 23-year battle |language=en-GB |work=The Guardian |url=https://www.theguardian.com/uk-news/2023/jul/20/a-wonderful-moment-welsh-reservoirs-to-reopen-after-23-year-battle |access-date=2023-08-14 |issn=0261-3077}}{{Cite web |title=Lisvane And Llanishen Reservoirs - Cardiff - About Us |url=https://lisvane-llanishen.com/about-us/ |access-date=2023-08-14 |website=Lisvane And Llanishen Reservoirs |language=en}}
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The reservoir is protected as a Site of Special Scientific Interest.