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Colliery Ventilation Furnace at Llandafal

A Grade II Listed Building in Cwm, Blaenau Gwent

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Latitude: 51.7266 / 51°43'35"N

Longitude: -3.1772 / 3°10'37"W

OS Eastings: 318790

OS Northings: 203756

OS Grid: SO187037

Mapcode National: GBR HY.2FJN

Mapcode Global: VH6D1.WV6R

Plus Code: 9C3RPRGF+J4

Entry Name: Colliery Ventilation Furnace at Llandafal

Listing Date: 26 September 1994

Last Amended: 9 September 1999

Grade: II

Source: Cadw

Source ID: 15836

Building Class: Industrial

Location: Located on a wooded hillside to the SW of the site of the former Marine Colliery, immediately uphill from a metal bridge over the Ebbw River.

County: Blaenau Gwent

Community: Cwm

Community: Cwm

Locality: Llandafal

Traditional County: Monmouthshire

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Early-mid C19. This part of the Ebbw Valley was connected to the ironworks at the head of the valley and the Monmouthshire Canal at Crumlin via the Beaufort tramroad, as early as 1796. The ventilation furnace probably dates from mining developments in the 1840s or 1850s, and was disused by 1876. The furnace is typical of its date, the shaft beneath the chimney connected to underground workings, a fire lit at the bottom of the shaft drawing air through the mine to exit from the chimney. Such furnaces were commonly used in South Wales until the end of the C19, but few survive in good condition. Most shown in contemporary illustrations had chimneys which were circular in plan and squat in elevation, like this example, but no others of this form are known to survive.


Construction of brown and yellow firebrick, with black mortar. Circular in plan, the diameter approximately 3.5m. Vertical sides rising to approximately 7m Thick walls topped by large diamond patterned coping bricks. A small blocked archway on the S side may have been intended for an additional flue to be added. The air shaft is connected to a stone-lined drift of similar date, entering the hill from the riverbank below.

Reasons for Listing

Listed as an early air furnace colliery chimney, the only one of this typical form known to survive in South Wales.

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