Ffynnon Llugwy
lake in the Carneddau range of mountains in Snowdonia, North Wales
Ffynnon Llugwy is a lake in the Carneddau range of mountains in Snowdonia, North Wales.
It lies at a height of about 1,786 feet (544 m) and covers an area of some 40 acres (16.19 ha). It has a maximum depth of 146 ft (45 m).
Since the early twentieth century water has been taken from its outflow, the River Llugwy to feed Llyn Cowlyd via a series of leats.
Since the mid-1970s the lake has additionally acted as a reservoir for Bangor and eastern Anglesey, which necessitated the laying of a pipeline some 11 mi (18 km) long to the water treatment works at Mynydd Llandygai.
It is the source of the River Llugwy which flows via Capel Curig and Betws-y-Coed before becoming a tributary of the River Conwy.
The public source identifies “Ffynnon Llugwy” as lake in the Carneddau range of mountains in Snowdonia, North Wales. This brief keeps that definition visible, then builds a research path around Ffynnon, Llugwy and lake.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Ffynnon Llugwy”, the useful work is to connect “lake in the Carneddau range of mountains in Snowdonia, North Wales” to the records capable of establishing context and consequence.
Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Jul 25, 2026. The linked authority identifier is Q5446248. Authority coordinates are 53.146, -3.956. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
Architectural summaries often privilege surviving fabric and can understate demolished phases, contested use or displaced communities. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
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- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
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- Expand the search: follow Ffynnon Llugwy primary sources, Ffynnon Llugwy archive and Ffynnon research across catalogues and specialist indexes.
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Questions for further research
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Search terms from this dossier
This entry incorporates text from “Ffynnon Llugwy” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.