Ancient Monuments

History on the Ground

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Clyne Valley Shaft Mounds

A Scheduled Monument in Sketty (Sgeti), Swansea (Abertawe)

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Latitude: 51.6086 / 51°36'30"N

Longitude: -4.0099 / 4°0'35"W

OS Eastings: 260915

OS Northings: 191885

OS Grid: SS609918

Mapcode National: GBR GX.CDF4

Mapcode Global: VH4K8.FTZR

Entry Name: Clyne Valley Shaft Mounds

Scheduled Date: 26 July 1994

Source: Cadw

Source ID: 1008

Cadw Legacy ID: GM455

Schedule Class: Industrial

Category: Coal Mine

Period: Post Medieval/Modern

County: Swansea (Abertawe)

Community: Sketty (Sgeti)

Built-Up Area: Swansea

Traditional County: Glamorgan


The monument comprises the remains of a well preserved group of relict shaft mound features for early coal mining. These examples are most likely to represent small bell-pits for primitive digging of coal seams near the surface, probably from around the seventeenth and eighteenth centuries. Some nineteenth century workings lie between them, with larger shaft mounds and working platforms, from the period of working following the construction of the Oystermouth Railway into the valley in 1804. Recent archaeological excavations at similar sites have shown the diversity of such features and their potential importance in understanding mining history.

The monument is of national importance for its potential to enhance our knowledge of 18th and 19th century industrial and mining practices. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. Shaft mounds may be part of a larger cluster of 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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