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Railway viaduct N of Llwyn Einon (partly in Llangammarch Community)

A Grade II Listed Building in Llangamarch, Powys

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Latitude: 52.1248 / 52°7'29"N

Longitude: -3.5447 / 3°32'41"W

OS Eastings: 294345

OS Northings: 248516

OS Grid: SN943485

Mapcode National: GBR YG.8CCG

Mapcode Global: VH5DG.HVXH

Entry Name: Railway viaduct N of Llwyn Einon (partly in Llangammarch Community)

Listing Date: 30 October 2000

Last Amended: 30 October 2000

Grade: II

Source: Cadw

Source ID: 24359

Building Class: Transport

Location: Spanning the River Irfon 1.2km SW of Garth village.

County: Powys

Community: Llangamarch

Community: Treflys

Locality: Garth

Traditional County: Brecknockshire

Find accommodation in
Llangammarch Wells


Part of the Central Wales Extension Railway opened from Builth to Garth in 1866, and extended to Llanwrtyd in 1867. The line was operated by the London and North Western Railway and from 1922 by the London, Midland and Scottish. The cast iron girders were cast in 1866 by the Brymbo Ironworks (name plates on each girder).


A skewed 3-bay viaduct with snecked rock-faced shale piers and abutments, iron girders supporting the deck, and brick parapet. The piers have wider bases with pointed cutwaters and are extended out on the S side to accommodate an extension of the piers for a second track. The abutments are likewise extended on the S side, beyond which they curve outwards and downwards and have rock-faced copings. The piers have freestone caps below the deck. The deck is constructed of girders and its parapets have shallow terminal and intermediate piers with brick copings, the terminal piers having coarse concrete saddleback copings.

Reasons for Listing

Listed as a substantial railway bridge notable for the early use of flat girders cast at Brymbo to carry the deck, and for group value with a similar bridge spanning the Irfon 400m NE.

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