Powder House, Big Pit Mining Museum is a Grade II listed building in the Torfaen local planning authority area, Wales. First listed on 9 February 1995. Museum building.
Powder House, Big Pit Mining Museum
- WRENN ID
- lone-passage-heath
- Grade
- II
- Local Planning Authority
- Torfaen
- Constituency
- Torfaen MP: Nick Thomas-Symonds (Lab)
- Country
- Wales
- Date first listed
- 9 February 1995
- Type
- Museum building
- Address
- Powder House, Big Pit Mining Museum, Blaenavon
- OS grid reference
- SO 238 086
- Coordinates
- 51.77143, -3.10564
- Source
- Cadw listing
Description
The Powder House at Big Pit Mining Museum is a single-storey, rectangular brick building featuring a flat concrete roof. On the north-west elevation, there are two doorways that serve as separate entrance and exit, both fitted with steel doors. The eastern doorway includes a flat-roofed porch. High between the doors, there is a wide slit window with an angled brick sill. All openings in the building have square heads and are topped with concrete lintels.
Local climate
Powder House, Big Pit Mining Museum sits in a wetter-than-average part of the UK, with an average of 1,040 mm of rain a year. This makes it wetter than 83% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 75% of listed buildings.
It experiences an average of 48 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 24 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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