Ancient Monuments

History on the Ground

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Deeside Slateworks

A Scheduled Monument in Corwen, Denbighshire (Sir Ddinbych)

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Latitude: 52.968 / 52°58'4"N

Longitude: -3.2695 / 3°16'10"W

OS Eastings: 314838

OS Northings: 341939

OS Grid: SJ148419

Mapcode National: GBR 6T.K491

Mapcode Global: WH782.RN9H

Entry Name: Deeside Slateworks

Scheduled Date: 13 May 1998

Source: Cadw

Source ID: 3878

Cadw Legacy ID: DE246

Schedule Class: Water Supply and Drainage

Category: Water Power System

Period: Post Medieval/Modern

County: Denbighshire (Sir Ddinbych)

Community: Corwen

Traditional County: Merionethshire


The monument consists of a water power system, which formed part of the Deeside Slateworks. The remains include an office building, a smithy, a large water wheel pit adjacent to the footings of the main works building of which little survives save seven huge buttresses against the bank, on which wooden tramrails from the tram line still survive. The tram road embankment running down to the winding engine still survives, as does the winding house of slate, albeit in bad condition. An incline (cut by a track) leads down towards the station at Glandyfyrdwy.

The monument is of national importance for its potential to enhance our knowledge of water management systems. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The structure itself may be expected to contain archaeological information concerning chronology and building techniques. The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Source: Cadw

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