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Deeside Slateworks is a post-medieval and modern water power system located in Wales and protected by Cadw under reference DE246. The site exploits the natural water resources of the Dee valley to drive industrial machinery, a common practice in Welsh manufacturing from the seventeenth century onwards. The underlying Ludlow Rocks—a geological sequence of mudstone, siltstone and sandstone formed during the Ludlow period—provided stable ground for construction whilst the river itself furnished the essential motive power for the works.
The slateworks represents the industrial application of water power to process slate, a material central to Welsh quarrying heritage. Such installations typically comprised a series of channels, leats and wheel pits engineered to direct and regulate water flow through the site. The Dee's reliable gradient and volume made it an ideal resource for this purpose, allowing operators to harness consistent hydraulic force throughout the working day and across seasons.
The monument survives as an important record of post-medieval industrial enterprise in the Welsh borderland. Physical remains of the water management infrastructure—channels, banks and structural elements—bear witness to centuries of technological investment and labour. The site reflects the integration of landscape, geology and engineering that characterised British industrial development before the advent of steam power.
Deeside Slateworks is a scheduled monument protected by Cadw under reference DE246. View the official record →
Deeside Slateworks is a post-medieval and modern water power system located in Wales and protected by Cadw under reference DE246.
Deeside Slateworks dates from the post medieval/modern period, and is classified as a water power system. It is one of over 32,000 scheduled monuments protected across the UK.
Deeside Slateworks is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is DE246.
Several scheduled monuments lie within 10 km, including Two Cairns North of Plasnewydd (1.8 km), Owain Glyndwr's Mount (2.4 km), Wilderness Round Barrows (2.9 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Deeside Slateworks's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Deeside Slateworks stands on Ludlow Rocks (Undifferentiated), bedrock that formed in the Ludlow. The rock here is mudstone, siltstone and sandstone.