History

The Dinorwic Quarry was first established in 1787, taking over existing workings in the area, the first incline being built in 1789. By the 1830s there was a tramway system on each terrace of the quarry, steam locomotives being introduced in the 1870s. The eventual scale of the quarry was such that its output of c100,000 tons p.a. in the late 1890s put in on a par with Penrhyn, representing almost a quarter of the total production of Welsh slate. The quarry finally closed in 1969. The lower 4 pitches of this incline (the 'A' incline) brought material down from Mills Level of the quarry to the Padarn Railway loading platforms, the sharp turn between Drumhouses A 2 and A3 marking a replacement of earlier inclines which ran straight down at this point. The upper pitches (not included on this List) have been modified to carry cables for the Llanberis hydro-electric company and the drumhouses demolished.

Exterior

Drumhouses of local rubblestone and slate-slab construction, the latter predominating, each with a gable-ended graded slate roof, that to drumhouse 2 in poorest condition with a number of slates missing at time of Survey. Each drumhouse retains a winding drum and cabling, the double track with rails to the incline itself remaining almost completely in situ. The lower drumhouses (1 and 2) have brakesman's cabins alongside, well-built with fireplaces, the latter having a contiguous office with squint window offering a view of approaching wagons. At this point a stone-walled path leading from Dinorwic down to Llanberis is carried over the incline by means of a cast-iron girder bridge, while the wall bounding the track on its south-western side has heavy slate slabs cantilevered out to provide shelter for the men handling the wagons.

Reasons for Listing

Included as a remarkably well-preserved incline with drumhouses and counter balances forming an integral part of the former Dinorwic Slate Quarry complex and particularly important for the impressive physical evidence it provides for the distribution of slate away from the quarry.

Scheduled Ancient Monument (177).

External Links

• Cadwr Listing
• Wikidata Q29499835

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

• 
  Specifications for Building Conservation: Volume 1: External Structure: Practical Examples v. 2
• 
  Huddersfield in 50 Buildings
• 
  Gwent/Monmouthshire (Pevsner Architectural Guides: Buildings of Wales)
• 
  Devon (Pevsner Architectural Guides: Buildings of England)
• 
  Somerset: North and Bristol: The Buildings of England (Pevsner Architectural Guides) (Pevsner Architectural Guides: Buildings of England)
• 
  Hampshire: Winchester and the North (The Buildings of England) (Pevsner Architectural Guides: Buildings of England)