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Cof Cymru: National Historic Assets of Wales · Wales

Railway Tunnel Portal

Ffestiniog, Gwynedd, Wales

A Grade II listed building in Llechwedd Slate Mine, Ffestiniog, Gwynedd, designated on 1 February 1996.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Railway Tunnel Portal, Ffestiniog, Gwynedd, with a pin at the register's coordinates
Ordnance Survey six-inch map, 2nd edition (1888–1913), covering this location. Courtesy of the National Library of Scotland. The pin is ours, placed from the register's coordinates.

The record

Designation
Listed building, Grade II
Broad class
Transport
Date of designation
1 February 1996
Locality
Llechwedd Slate Mine
Community
Ffestiniog
Unitary authority
Gwynedd
Country
Wales
Coordinates
53.00378, -3.94339
Cadw reference
16885

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

David Rumsey Map Collection, Stanford Libraries

5 historical maps cover this location, the earliest the 1795 map "To Sir Watkin Williams-Wynn Bart ... the map of the six counties of North Wales is most humbly inscribed by his obedient humble servant" (Llyfrgell Genedlaethol Cymru – The National Library of Wales).

Historical maps covering this location

  • 1795 · To Sir Watkin Williams-Wynn Bart ... the map of the six counties of North Wales is most… (Llyfrgell Genedlaethol Cymru – The National Library of Wales)
  • 1883 · Watershed map England, Wales 3. (David Rumsey Map Collection, Stanford Libraries)
  • 1896 · Sheet 7. Ordnance Survey of England and Wales. (David Rumsey Map Collection, Stanford Libraries)
  • 1899 · 119 Snowdon (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 9 and 10. (David Rumsey Map Collection, Stanford Libraries)

Get directions ↗

This record in Cadw's own full report ↗

Cadw's description

At the S entrance of Blaenau railway tunnel, immediately W of the road on the downhill approach to the town from the Crimea Pass.

History: Tunnel entrance dated 1879 and constructed for the LNWR at the mouth of the Blaenau Tunnel. By W. Smith, engineer, whose name appears on a date plaque above the entrance arch.

Description: Broad semi-circular arch set within tapered and pedimented portal. Of snecked, rough-dressed stone; expressed voussoirs and simple arch ring. The pediment, with central recessed slate date plaque, is set over a dentillated cornice. Stepped and angled retaining walls to either side of the entrance.

Listed for its special interest as a C19 railway tunnel portal and for group value with other listed items at the former Llechwedd railway sidings.

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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