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Cof Cymru: National Historic Assets of Wales · Wales

Nantlle Tramway River Bridge

Bontnewydd, Gwynedd, Wales

The record

Designation
Listed building, Grade II
Broad class
Transport
Date of designation
9 September 1999
Locality
Bontnewydd
Town
Caernarfon
Community
Bontnewydd
Unitary authority
Gwynedd
Country
Wales
Coordinates
53.11485, -4.27242
Cadw reference
22281

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 1883 "Watershed map England, Wales 3." (David Rumsey Map Collection, Stanford Libraries).

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This record in Cadw's own full report ↗

Cadw's description

The Bridge spans Afon Gwyrfai on the west side of Bontnewydd.

The Nantlle Railway Act was passed in 1825, and the tramway opened in 1828. The tramway was built to connect Talysarn in the slate-quarrying area of Dyffryn Nantlle with Caernarfon. The initiative for the railway came from the proprietors of the Cilgwyn, Penybryn and Talysarn Quarries, who first mooted the idea for a tramway in 1813, to reduce the heavy shipment costs of transporting slate by road. The railway was built by a joint stock company, with Robert Williams of Bangor as resident engineer, Robert Stephenson (junior) and William Owen of Gwaenfynydd as contractors in consultation with George Stephenson. It was built with a 3'6" (1.067m) gauge. The line was taken over by the Caernarvonshire Railway and converted to standard gauge in 1867, and the bridge was then abandoned. The railway is an early example of a public railway, the first public line to serve the slate quarry industry in Wales.

Single span narrow bridge over river. Rubble masonry, with high arch. Some loss of stonework in spandrels of archway.

Listed as a fine example of an early railway engineering on an important transport route associated with the growth of quarrying in N Wales. The bridge retains its original character and is a significant relic of this important early tramway.

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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