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Clydach Ironworks ruins

Clydach Ironworks ruins

Ruins of a blast furnace

Judging from the crumbled remains of Clydach Ironworks, you wouldn't expect more than a thousand people to have been working here in 1840.

Clydach was built simultaneously as Blaenavon Ironworks, specifically in the late eighteenth century.

Only the two brick blast furnaces and the foundations of a later addition can still be seen - with some imagination - the rest of the once gigantic iron factory has disappeared.


The arrival of superior steel heralded the demise of the raw iron industry towards the end of the 19th century. This is also the case in South Wales, as evidenced by Clydach Ironworks, which closed in 1861.

Slate quarries

Clydach Gorge not only features the remains of blast furnaces but is also littered with other remnants of industrial activity. You will find old tram tunnels and tracks, viaducts and the Clydach slate quarry.

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