Gunpowder magazine at Llywernog Mine is a Grade II listed building in the Ceredigion local planning authority area, Wales. First listed on 22 June 1995. Powder magazine.
Gunpowder magazine at Llywernog Mine
- WRENN ID
- late-barrel-summer
- Grade
- II
- Local Planning Authority
- Ceredigion
- Constituency
- Ceredigion Preseli MP: Ben Lake (PC)
- Country
- Wales
- Date first listed
- 22 June 1995
- Type
- Powder magazine
- Address
- Gunpowder magazine at Llywernog Mine, Aberystwyth, Blaenrheidol
- OS grid reference
- SN 731 810
- Coordinates
- 52.4127, -3.86615
- Source
- Cadw listing
Description
The gunpowder magazine at Llywernog Mine is a circular structure built from rubble stone. It features a low conical roof made of flat stones, topped with a circular stone. A distinctive row of projecting stones runs beneath the corbelled roof. The only entrance is located to the north; it is a full-height opening with a square head and a timber lintel.
Inside, the circular space has a roof that springs from a wall-head made of overhanging stones, with corbelling created by rings of flat stones.
Local climate
Gunpowder magazine at Llywernog Mine sits in one of the wettest parts of the UK, with an average of 1,280 mm of rain a year. This makes it wetter than 94% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 90% of listed buildings.
It experiences an average of 40 freeze-thaw cycles a year, more than 78% of listed buildings. Of these, 21 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
More on this building
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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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