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Cof Cymru: National Historic Assets of Wales · Wales

Lower Viaduct

Llanberis, Gwynedd, Wales

The record

Designation
Listed building, Grade II
Broad class
Transport
Date of designation
28 May 1999
Locality
Llanberis
Town
Caernarfon
Community
Llanberis
Unitary authority
Gwynedd
Country
Wales
Coordinates
53.11393, -4.12276
Cadw reference
21851

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

Shown on 5 historical map sheets, the earliest the 1896 "Sheet 7. Ordnance Survey of England and Wales." (David Rumsey Map Collection, Stanford Libraries).

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This record in Cadw's own full report ↗

Cadw's description

Located towards the foot of the Snowdon Mountain Railway where it crosses the road and begins to ascend rapidly in height.

An original structure on The Snowdon Mountain Railway, which was founded as the Snowdon Mountain Tramroad & Hotels Co. Ltd. in 1894 and opened in 1896. The engineers were Douglas and Francis Fox and the line was originally operated by 5 steam locomotives from Switzerland on the rack and pinion system first devised by Dr Roman Abt of Lucerne. Purely recreational in use, the line has always been a major attraction to tourists visiting the area.

Railway viaduct comprising 13 skewed round-headed arches rapidly increasing in height to incline, with a further half arch above the natural rock to the top end. Snecked rock-faced rubblestone blocks with heavily tooled ashlar coping and toothed purple brick to arches.

Included as a major engineering structure on the pioneering Snowdon Mountain Railway.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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