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Wales Low‑importance This article is within the scope of WikiProject Wales, a collaborative effort to improve the coverage of Wales on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.WalesWikipedia:WikiProject WalesTemplate:WikiProject WalesWales articles Low This article has been rated as Low-importance on the project's importance scale. Dams Low‑importance This article is within the scope of WikiProject Dams, a collaborative effort to improve the coverage of Dams on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.DamsWikipedia:WikiProject DamsTemplate:WikiProject DamsDam articles Low This article has been rated as Low-importance on the project's importance scale. Lakes Low‑importance Pontsticill Reservoir is within the scope of WikiProject Lakes, a collaborative effort to improve the coverage of lake-related articles on Wikipedia, using the tools on the project page. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.LakesWikipedia:WikiProject LakesTemplate:WikiProject LakesLakes articles Low This article has been rated as Low-importance on the project's importance scale.

Pontsticill Reservoir was constructed downstream of the pre-existing Pentwyn Reservoir and the water surface of the two is continuous only at or near maximum water levels. Pentwyn is constrained by a submerged dam which emerges when the level of Pontsticill Reservoir falls. The given surface area of just over 1 sq km is for Pontsticill alone. The area of Pentwyn is an additional 39ha (0.15 square miles) (note this is my measurement - a separate source would be required to add the figure to the article). Geopersona ( talk) 11:56, 10 February 2024 (UTC) reply