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Latitude: 52.7193 / 52°43'9"N
Longitude: -4.0452 / 4°2'42"W
OS Eastings: 261955
OS Northings: 315483
OS Grid: SH619154
Mapcode National: GBR 8T.1NNQ
Mapcode Global: WH56L.TXW5
Plus Code: 9C4QPX93+PW
Entry Name: Barmouth Railway Bridge (partly in Arthog Community)
Listing Date: 22 March 1988
Last Amended: 31 January 1995
Source ID: 5207
Building Class: Transport
Location: Long viaduct spanning the Mawddach estuary immediately to the S of Barmouth and crossing into Arthog Community.
Community: Barmouth (Bermo)
Locality: Barmouth Bridge
Built-Up Area: Barmouth
Traditional County: Merionethshire
The Barmouth railway bridge was designed by Benjamin Piercy, engineer to the Cambrian Railways, and was opened in June 1867. It was rebuilt in stages from 1899-1909 by the Cleveland Bridge and Engineering Company of Darlington and by Abraham Williams, contractor of Aberdovey. Extensive repairs were carried out between 1981-5.
Single-track railway viaduct (751 yards long) with 113 groups of timber supports (pile bents) and 5-span steel section incorporating a swing bridge (built 1899) towards the N (Barmouth) end. Rubble-faced abutment to N shore; concrete to S end. Low trabeated structure with longitudinal timbers supporting main timber deck and rails; cross-braced timber piles with raking shores supported by concrete foundations. Strapped steel cylinders to 2-lane opening section with twin bow-trussed girders tied over track; twin column supports with bulbous caps (wider to opening piers), metal deckand latticework braces. Lower boarded pedestrian walkway with modernrailing on upstream side (an addition of 1868-79).
Listed grade II* as the only major timber-built viaduct still in use by British Rail.
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