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Cof Cymru: National Historic Assets of Wales · Wales

Western Portal of Penmaen Rhos Railway Tunnel

Old Colwyn, Conwy, Wales

The record

Designation
Listed building, Grade II
Broad class
Domestic
Date of designation
9 September 1994
Locality
Old Colwyn
Community
Old Colwyn
Unitary authority
Conwy
Country
Wales
Coordinates
53.29291, -3.68297
Cadw reference
14862

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 1795 "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).

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This record in Cadw's own full report ↗

Cadw's description

At the western mouth of the railway tunnel.

The Chester to Holyhed Railway was proposed to improve links between London and Dublin, with George Stephenson as engineer, Francis Thompson as architect. Work began in 1845 and the line was opened as far as Bangor in 1848. The 486 yard Penmaen Rhos Tunnel was bored through limestone.

White limestone, ashlar over arch, rusticated to terminal piers, and coursed and squared to parapet. Shallow segmental arch with stepped moulded cornice over, between terminal turretted piers, which are rectangular in section, and have machicoated embattled heads.

A distinctive example of railway architecture, dating from the original period of
construction of the line and probably designed by Stephenson or Thompson.

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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