History in Structure

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Bridge over drainage ditch at entrance to Tan-y-Marian

A Grade II Listed Building in Porthmadog, Gwynedd

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Latitude: 52.9409 / 52°56'27"N

Longitude: -4.1358 / 4°8'8"W

OS Eastings: 256571

OS Northings: 340301

OS Grid: SH565403

Mapcode National: GBR 5P.LPV8

Mapcode Global: WH55L.FBSS

Entry Name: Bridge over drainage ditch at entrance to Tan-y-Marian

Listing Date: 26 September 2005

Last Amended: 26 September 2005

Grade: II

Source: Cadw

Source ID: 85308

Location: Beside the main road approximately 400m ENE of Tremadog Market Square by the entrance to Tan y Marian, although originally giving access to fields.

County: Gwynedd

Community: Porthmadog

Community: Porthmadog

Locality: Tremadog

Traditional County: Caernarfonshire

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A mid C19 bridge providing access to farmland from the main road, across a drainage ditch. The ditch is an integral component of the reclamation of Traeth Mawr in the early C19 by William Madocks. The bridge is shown on the 1871 Tremadog estate plan.


A single-carriageway single-span bridge of blocks of rubble stone laid in regular courses. It has a segmental arch with voussoirs and simple drip mould. The parapet has been lowered on the road (N) side and has a cement coping. On the SE side it is splayed to a terminal square pier. On the SW side the parapet abuts an iron gate with square stone piers.


Not inspected.

Reasons for Listing

Listed as a small bridge retaining C19 character, and indicative of the history of the reclamation of Traeth Mawr.

Other nearby listed buildings

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