North-eastern aerial ropeway revetment, incline and associated buildings, Llanllyfni, Gwynedd

Coordinates

Latitude: 53.0553 / 53°3'19"N

Longitude: -4.2378 / 4°14'15"W

OS Eastings: 250117

OS Northings: 353236

OS Grid: SH501532

Mapcode National: GBR 5K.CH1Z

Mapcode Global: WH43T.WG6L

Plus Code: 9C5Q3Q46+4V

Entry Name: North-eastern aerial ropeway revetment, incline and associated buildings

Listing Date: 21 July 2000

Last Amended: 21 July 2000

Grade: II

Source: Cadw

Source ID: 23688

Building Class: Industrial

ID on this website: 300023688

Location: Located above the east side of the North Dorothea Slate Quarry between Pen-y-Bryn to the north-east and the ruins of the former slate mill to the south-east.

County: Gwynedd

Community: Llanllyfni

Locality: Nantlle

Traditional County: Caernarfonshire

Tagged with: Architectural structure

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History

The Dorothea Quarry in the centre of the Nantlle Vale was opened in 1829 by William Turner and John Morgan. From 1853 until its closure in 1970 the quarry was owned by the Williams family. The reveted structure and incline are shown on an Ordnance Survey map of 1889. The purpose of the revetment was to house engines which drove chain or cable inclines at an angle of about 45 degrees, enabling quarry wagons to be pulled up and let down using further cables.

Exterior

Large ziggurat-like structure of sawn slate blocks, aligned roughly east-west. The sides are strongly battered with offsets on the north face; remains of slate-built structures on top at south end. Projecting from the south end, in a north-westerly direction, is a slate-built inclined plane with the remains of a winding house at its head.

Reasons for Listing

Included as one of a pair of large and unique aerial ropeway revetments, impressive for the scale of their engineering and having strong group value with the Cornish beam engine house at this important C19 slate quarry.

Scheduled Ancient Monument (No.199).

External Links

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

Other nearby listed buildings

II Strainer arches and retaining walls
Located to the south of Pen-y-bryn, the strainer arches and walls retain the slate waste tips flanking the route of the Dorothea Quarry branch of the former Nantlle Railway.
II Pen-y-bryn
Located at the end of a track on the north side of the old Talysarn to Nantlle Road.
II South-western aerial ropeway revetment, incline and associated buildings
Located above the south side of the North Dorothea Slate Quarry, between the Cornish beam engine house to the west and the ruins of the former slate mill to the east.
II Tunnel Portal and Tunnel
Located in the hillside to the north of Talysarn Hall.
II* Engine House, Boilerhouse, Bunker and remains of chimney to south
On a ridge of bastard rock which divides the main Dorothea Quarry from the South Dorothea Quarry; located by the side of the road access to the quarry.
II Coach house/wash house and stables at Bryn Deulyn
Located in grounds of Bryn Deulyn to south of house; set into a bank with the massive waste tip of the former Dorothea Slate Quarry immediately behind.
II Bryn Deulyn
Located on bend in narrow road at eastern entrance to Dorothea Slate Quarry with hooped iron railings on low entrance walls swept to left side to enable easy vehicular access.
II Causeway
Located off the B 4418 to the north of Dorothea House, beginning beyond Pont Wythdir and running north-east for approximately 100m across marshy ground with a spoil heap to the north-west on the south

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History in Structure

North-eastern aerial ropeway revetment, incline and associated buildings

A Grade II Listed Building in Llanllyfni, Gwynedd