23815

 

II  

Designated  

27/07/2000  

27/07/2000  

Nant Dyar Railway Viaduct  

 

Monmouthshire  

Llanelly  

 

Clydach  

323235  

212759  

 

Located some I km SW of Clydach village. Viaduct carries public footpath leading from Clydach - Waunllapria by-road, past former railway station.  

Transport  

 

Built 1862 and widened 1877, forming part of the Merthyr, Tredegar and Abergavenny Railway. The Engineer was John Gardner (1821-1894), who has engineered the Staines and Wokingham Railway, and also the Nantwich and Market Drayton Railway, as well as having doubled the line between Abergavenny and Brynmawr. The company was set up in 1859, consisting largely of ironmasters including Crawshay Bailey of Nantyglo, Thomas Brown of Ebbw Vale and James Hill of Blaenavon. A local director was John Jayne of Pant-y-beiliau. First sod cut at Abergavenny on 18th June 1860 by Mrs Crawshay Bailey. By August 1860, 8 bridges were under construction, as well as the tunnels at Gellifelen. By 1861, the company was overdrawn, due to the high engineering costs. The London and North Western Railway took a 1000 year lease of the company, confirmed by Act in August 1862, by which time the line was operating from Abergavenny to Brynmawr. Brynmawr-Nantybwch section finished by March 1864. The rest of the line to the west was completed by 1879. In 1877 the line was doubled.  

Eight arch viaduct over steep gorge of the Nant Dyar. Line of viaduct gently curves, the length being 312 feet (95 metres), the height 75 feet (23 metres). Rock-faced limestone construction, blue Staffordshire brick arch rings of four header courses, each arch being 30 feet (9 metres) wide. Low parapet above rock-faced stringcourse.  

 

Listed as a major survival of later C19 railway engineering, the railway being important to the iron and coal industry of the eastern valleys of Wales. The viaduct is a prominent survival of the important industrial landscape of the Clydach Gorge.