Ancient Monuments

History on the Ground

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Cwmbyrgwm Colliery

A Scheduled Monument in Abersychan, Torfaen (Tor-faen)

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Latitude: 51.7236 / 51°43'24"N

Longitude: -3.0856 / 3°5'8"W

OS Eastings: 325111

OS Northings: 203317

OS Grid: SO251033

Mapcode National: GBR J2.2LKR

Mapcode Global: VH79K.GYM3

Entry Name: Cwmbyrgwm Colliery

Scheduled Date:

Source: Cadw

Source ID: 2396

Cadw Legacy ID: MM163

Schedule Class: Industrial

Category: Coal Mine

Period: Post Medieval/Modern

County: Torfaen (Tor-faen)

Community: Abersychan

Traditional County: Monmouthshire


The monument consists of a coal and iron mine, dating to the early 19th century and was in operation until the early 20th century. Mining began at the location before 1820, and expanded to feed the adjacent British Ironworks after 1827. The remains include waterbalance gear, a brick chimney, watercourses, two reservoir dams, levels, three oval shafts and tramroad incline.

The monument is of national importance for its potential to enhance and illustrate our knowledge and understanding of the development of the coalmining industry in Wales. It retains significant archaeological potential, with the strong possibility of the presence of associated archaeological features and deposits. A caol mine may be part of a larger cluster of industrial monuments and their importance can further enhanced by their group value. 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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