History

The eastern building was opened in 1910 and originally housed lathes and drills for repairing equipment. It is currently acting as the museum reception. The western building was added in 1917. Big Pit was operated in connection with Blaenavon Ironworks, then by the National Coal Board from 1947 to 1980. Underground workings date from the early C19 but the shaft on this site was sunk in 1860. The present surface structures date from between c1900 and the 1970's. This piecemeal development was typical of mines in South Wales and it is now the most complete remaining, having been reopened as a museum in 1983.

Exterior

Pair of single storey, rectangular buildings. The west building has four bays and is slightly shorter than that to the east, which has five bays. Snecked stone construction, with plinth running across the base of both buildings. The main gable of the earlier (east) building has a central tramway door, flanked by tall sash windows with window above. Return elevation to east has five bays, fourth bay has doorway, others have sash windows. These openings formed as segmental stone arches with stone sills. Metal ventilation grill below each. Rear gable has single large window with segmental arch and brick dressing. The pitched slate roof has tiled ridge; wooden brackets in verges. The later (west) building is similar. Main gable has only one window. Rear gable has tramway door with brick dressings and window above.

Interior

Steel joist trusses to the roof. Otherwise fitted out as a gift shop.

Reasons for Listing

Included as a well preserved example of a traditional stone-built ancillary building of the South Wales coal industry.

Group value with other listed items at this exceptionally complete colliery site.

External Links

• Cadwr Listing
• Wikidata Q29493052

External links are from the relevant listing authority and, where applicable, Wikidata. Wikidata IDs may be related buildings as well as this specific building. If you want to add or update a link, you will need to do so by editing the Wikidata entry.

Recommended Books

• 
  Hertfordshire (Pevsner Architectural Guides: Buildings of England)
• 
  Huddersfield in 50 Buildings
• 
  Yorkshire West Riding: Sheffield and the South (Pevsner Architectural Guides: Buildings of England)
• 
  Harrow on the Hill: A photographic portrayal of listed buildings and structures (Historic Buildings Picture Guides)
• 
  Suffolk: East (Pevsner Architectural Guides: Buildings of England)
• 
  Farrow & Ball How to Decorate: Transform your home with paint & paper