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Cof Cymru: National Historic Assets of Wales · Wales

Bridge and Causeway to Former Quarry at Chwarel-y-Fedw.

Dolwyddelan, Conwy, Wales

The record

Designation
Listed building, Grade II
Broad class
Transport
Date of designation
17 February 1997
Locality
Brynmoel
Community
Dolwyddelan
Unitary authority
Conwy
Country
Wales
Coordinates
53.05669, -3.87361
Cadw reference
18250

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

Located some 1500m NE of Dolwyddelan village, between the main road (A 470) and the railway track, on the SE bank of the river Lledr.

Mid-late C19 clapper-built causeway, originally carrying a narrow-gauge rail-link from the Chwarel-y-Fedw slate Quarry to the road; modern timber-faced, steel framed bridge over the Afon Lledr. The railway, completed in 1879 apparently post-dates it.

Slate-rubble causeway, approximately 230m long, and stretching in an arc from the road, across the river Lledr and on, terminating at the railway line. The first stretch, to the river is the longest, approximately 180m; this has a 9-span clapper section at the river end; constructed of large slatestone slabs, and with cutwaters to the upstream, convex side. The opposite side of the river has a similar 10-span clapper section; these rise slightly in the middle and are joined across the river by a modern timber bridge. The causeway is approximately 1.2m high and 1.8m wide; it is of dry-built, random rubble construction and has a metalled footpath and (in part) a C20 wire fence.

Listed for its special historic interest as an unusually long clapper-built bridge and causeway serving a former slate quarry.

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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