Strainer arches and retaining walls, Llanllyfni, Gwynedd

Coordinates

Latitude: 53.0558 / 53°3'20"N

Longitude: -4.2369 / 4°14'12"W

OS Eastings: 250177

OS Northings: 353287

OS Grid: SH501532

Mapcode National: GBR 5K.CH8C

Mapcode Global: WH43T.WGL6

Plus Code: 9C5Q3Q47+86

Entry Name: Strainer arches and retaining walls

Listing Date: 21 July 2000

Last Amended: 21 July 2000

Grade: II

Source: Cadw

Source ID: 23728

Building Class: Industrial

ID on this website: 300023728

Location: 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.

County: Gwynedd

Community: Llanllyfni

Locality: Nantlle

Traditional County: Caernarfonshire

Tagged with: Wall

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Nantlle

History

The Nantlle Railway opened in 1828 as a 3ft 6in (1.07m) gauge horse-drawn tramway to take slates from the Nantlle Vale quarries to the port at Caernarfon. The Dorothea Quarry opened in 1829 and remained in continuous production until 1970; the branch of the tramway/railway flanked by the strainer arches and retaining walls, which probably date to the late C19, connected the main line of the tramway to the main Dorothea Quarry.

Exterior

Two very high battered retaining walls built of coursed slate slabs with pair of slate strainer arches, arched above and below with slate voussoirs, holding the walls apart.

Reasons for Listing

Listed as substantial and distinctive structures associated with the former Nantlle Railway, an important early horse-drawn tramway, crucial to the rapid expansion of the Dorothea Slate Quarry during the C19.

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 North-eastern aerial ropeway revetment, incline and associated buildings
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.
II Pen-y-bryn
Located at the end of a track on the north side of the old Talysarn to Nantlle Road.
II Tunnel Portal and Tunnel
Located in the hillside to the north of Talysarn Hall.
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 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* 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 Former Dairy to north-west of Ty Mawr
Situated to the north-west of Ty Mawr, with former quarry workers' barracks behind.

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History in Structure

Strainer arches and retaining walls

A Grade II Listed Building in Llanllyfni, Gwynedd