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Western Portal of Penmaen Rhos Railway Tunnel

A Grade II Listed Building in Old Colwyn, Conwy

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Latitude: 53.2929 / 53°17'34"N

Longitude: -3.683 / 3°40'58"W

OS Eastings: 287920

OS Northings: 378649

OS Grid: SH879786

Mapcode National: GBR 2ZQC.G9

Mapcode Global: WH656.DHGF

Plus Code: 9C5R78V8+5R

Entry Name: Western Portal of Penmaen Rhos Railway Tunnel

Listing Date: 9 September 1994

Last Amended: 9 September 1994

Grade: II

Source: Cadw

Source ID: 14862

Building Class: Domestic

Location: At the western mouth of the railway tunnel.

County: Conwy

Community: Old Colwyn (Hen Golwyn)

Community: Old Colwyn

Built-Up Area: Colwyn Bay

Traditional County: Denbighshire

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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.

Reasons for Listing

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

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