South Wales Coalfield

Map of British coalfields

The South Wales Coalfield (Welsh: Maes glo De Cymru) is a large region of south Wales that is rich in coal deposits, especially the South Wales Valleys. It supported a large part, but not all, of the coal industry in Wales.

The coalfield area

The South Wales Coalfield extends across parts of Pembrokeshire, Carmarthenshire, Swansea, Neath Port Talbot, Bridgend, Rhondda Cynon Taf, Merthyr Tydfil, Caerphilly, Blaenau Gwent and Torfaen.[1]

It comprises a fully exposed synclinorium with a varying thickness of Coal Measures (Upper Carboniferous / Pennsylvanian) deposits with thick, workable seams in the lower parts and generally thinner and sparser seams in the upper parts, together with a development of sandstones (Pennant Sandstone). See also the Geology of South Wales. These sandstones have been much used in building construction (including the characteristic terraces of former miners' houses) and give rise to bleak uplands rising 300–600 metres above sea level between the steep-sided valleys in which most deep mines were developed.

The coal generally increases in grade or "rank" from east to west, with bituminous coals in the east, and anthracite in the west, mostly to the north and west of Neath. The Rhondda Valley was particularly known for steam coals which fuelled steamships of the 19th and early 20th centuries.

Exploitation of the coalfield

Industrial and transport expansion

Communications along the valley floors provided the main routeways for exporting coal south to ports and docks such as Newport Docks, Cardiff Docks and Barry Docks. Early activity was mainly by levels or adits driven into coal seams from outcrops in the valley sides. Development of the coalfield proceeded very actively from about 1850, when deep mining become significant in the previously entirely rural Rhondda Valley. Tramway-fed canals such as the Swansea Canal and Glamorganshire Canal were supplemented, and then superseded, by the development of numerous competing railway branches which fed docks principally at Swansea, Cardiff, Newport, Llanelli and Barry. Later colliery shafts were sunk as deep as 800 Yards (732 Metres) in order to reach the thicker, better quality seams.

Iron ore was also extracted from the coal measures, principally from the north crop area (including Merthyr Tydfil and Blaenavon). The availability of coal and nearby limestone (as a flux) gave rise to a substantial local iron and steel industry which was perpetuated in the 20th century by the location of modern steelworks at Ebbw Vale, Newport and Cardiff and Port Talbot. These used imported iron ore.


Coal fuelling of Royal Navy ships was increasingly challenged from 1904 when strategists including Admiral "Jacky" Fisher and, later, Winston Churchill successfully argued for oil-firing of the steam engines in new ships.[2][3] This trend, which was later extended to railway locomotives, was a factor in the economic hardship which struck the coalfield after the First World War. Coal workings were over-expanded in the late nineteenth century,[4] but the Welsh coal owners had failed to invest in mechanisation. By the inter-war period the South Wales Coalfield had the lowest productivity, highest costs and smallest profits in Britain.[5] Hardship continued through the 1926 general strike, the great depression of the 1930s, World War II and thereafter. The 1937 novel The Citadel and the 1939 novel How Green Was My Valley (later filmed, with a wildly inaccurate "colliery village") describe such hardship, as do the poems of Idris Davies the miner, teacher and poet of Rhymney.

New collieries, particularly in the western part of the coalfield where anthracite is found, were developed into the 1960s by the National Coal Board (for instance, Cynheidre Colliery No 1 shaft, at 798 yards (730 m) deep was sunk in 1954/6). Following the general collapse of the UK coal industry, most pits closed during the 1980s, with factors such as exhaustion of reserves and geological complexity adding to their problems. The last deep mine, at Tower Colliery on the north crop, ceased mining in January 2008. However, a few small licensed mines continue to work seams, mostly from outcrop, on the hillsides. Although some areas of the coalfield are effectively worked out, considerable reserves remain. However, the geological difficulties, which resulted in the closure of (for instance) Nantgarw colliery, make the cost of significant further extraction high. The coalfield experienced a late-stage development when opencast mining was commenced on a large scale, mostly on the gently-dipping north crop. In addition, old tips were reclaimed for their small coal content, which could be burned in power stations such as nearby Aberthaw. Most of the old sites have been filled and landscaped, but new operations continue.

Mining memorial at Rhondda Heritage Park

Following the Aberfan disaster of 1966, when a coal-tip slurry flow buried a school, mine-waste tips, which had been piled precariously on hilltops in many cases, were extensively regraded and reclaimed. This work continues. Landslipping of the steep valley slopes, and subsidence caused by the coal extraction, have also posed problems.

Minor Revival

A subsidiary of Western Coal (which mainly operates in the British Columbia and West Virginia coalfields), Energybuild plc worked a drift mine near the old Tower Colliery, the Aberpergwm Colliery, until production was suspended in July 2015.[6] The mine produced high quality anthracite, and was sold primarily to Aberthaw power station and Port Talbot Steelworks and into the wholesale and retail sized coal markets. Energybuild also operates the Nant y Mynydd opencast coal site nearby. The company is now (as of April, 2011) a subsidiary of Walter Energy Inc, a large US coal producer based in Alabama which took over Western Coal.

Sociology and demography of the South Wales coalfield

Population change

As the mines and other industries rapidly expanded throughout the coalfield, nearby towns also expanded to meet the demand for labour.[7] In the first half of the nineteenth century, the development of ironworks saw the population of the northern part of the coalfield saw Merthyr Tydfil's population increase from 7,700 in 1801 to 49,794 in 1861, making it the largest town in Wales.[7] As Cardiff and other ports in South Wales grew to meet the demands for exporting iron, steel and coal in the later part of the nineteenth century, previously sparsely inhabited valleys suddenly increased in population. The Rhondda valley grew from less than a thousand people in 1851 to more than 150,000 in 1911.[7]

Between 1881 and 1911, Glamorgan became the most industrialised part of Wales and saw inward migration of more than 330,000 people from elsewhere in Wales, neighbouring parts of England and further afield.[7]

By 1921 the coal mines were employing 250,000 men,[8] but this was the peak and in subsequent decades the overseas market began to shrink.[8] By 1930 employment in the mines was half of that in 1920 as mechanisation increased leading to a net loss of 314,000 people between 1921 and 1935.[8]

Accidents and safety

The South Wales coalfield was notorious for the number of fatal accidents in the 19th century.[9]

Risca Black Vein accidents

The Risca Black Vein colliery had many fatal accidents to the extent that it became known as the "death pit".[10]

The two biggest accidents at the Black Vein pit were in 1860, when 146 and 1880 when 119 lives were lost.[11]

Prince of Wales disaster

The Prince of Wales colliery in Abercarn exploded in 1878 causing 268 deaths.[11]

Llanerch Colliery disaster

The Llanerch Colliery in Abersychan exploded in 1890 causing 176 deaths.[11]

Albion Colliery disaster

The Albion Colliery in Cilfynydd exploded in 1894 causing 276 deaths.[11]

In the 20th century there were numerous further fatal accidents

Universal Colliery disaster

The Universal Colliery in Senghenydd had Wales' most fatal accident when it exploded in 1913 killing 431[12]

Aberfan disaster

Main article: Aberfan disaster

In 1966, 116 children and 28 adults were killed in Aberfan when a coal spoil tip collapsed onto them.[13]

Gleision Colliery tragedy

On 15 September 2011, seven miners were working a narrow seam at the Gleision Colliery drift mine in the Tawe Valley, near Swansea, when a sudden ingress of water filled the passage in which they were working. Three miners were immediately able to escape to the surface. Despite extensive efforts to rescue the remaining miners, on 16 September South Wales Police confirmed that all four had died. They have been named as Charles Breslin, 62; David Powell, 50; Garry Jenkins, 39; and Phillip Hill, 45.[14]

Health and Wellbeing

Miners health

Coal-mining in the South Wales coalfield was a dangerous occupation with lifelong health implications.[15]

Between 1849-53, miners over the age of 25 in the Merthyr Tydfil district were found to have a life expectancy of around 20 years - lower than in other mining areas of England and Wales.[16]

In the 1930s, mine owners became concerned about the effects of silicosis in coal dust and the amount it was costing them to compensate miners working at the coalface.[17] Pneumoconiosis turned out to be a particular problem for miners in South Wales, with more than 80% of cases in 1939 and 1945 and more than 25% of the mining labour force affected between 1959-63.[17]

Women's roles

Women in South Wales were often not economically active in the second half of the Nineteenth century due to the Mines and Collieries Act 1842 which prohibited women from working underground.[18] It has been suggested that this explains the lower marriage age and higher fertility of women in the coalfield.[18]

See also


  1. "South Wales (geological map)". Geological Maps of Selected British Regions. Southampton University website. Retrieved 9 April 2013.
  2. John Fisher biography at First World
  3. Churchill, Sir Winston Biography at The encyclopedia of Earth
  4. Davies, John; Nigel Jenkins; Menna Baines; Peredur I. Lynch (2008). The Welsh Academy Encyclopaedia of Wales. Cardiff: University of Wales Press. ISBN 978-0-7083-1953-6.
  5. Jenkins, Philip (1992). A History of Modern Wales 1536-1990. Harlow: Longman. p. 366. ISBN 0-582-48925-3.
  6. "Jobs to go as South West Wales coal mine is mothballed". South Wales Evening Post. 2015-06-26. Retrieved 2016-08-20.
  7. 1 2 3 4 Graham Day (1 January 2010). Making Sense of Wales: A Sociological Perspective. University of Wales Press. pp. 29–. ISBN 978-0-7083-2310-6.
  8. 1 2 3 Bloor, M. (2002). "No Longer Dying for a Living: Collective Responses to Injury Risks in South Wales Mining Communities, 1900-47". Sociology. 36 (1): 89–105. doi:10.1177/0038038502036001005. ISSN 0038-0385.
  9. "Welsh Mining Disasters". Welsh Coal Mines. Retrieved 15 April 2016.
  10. "Offenders uncover 1860 Risca mine tragedy stone plaque". BBC. 27 September 2010. Retrieved 15 April 2016.
  11. 1 2 3 4 Geoff Coyle (22 April 2010). The Riches Beneath our Feet: How Mining Shaped Britain. OUP Oxford. pp. 97–. ISBN 978-0-19-161397-5.
  12. "Senghenydd: Centenary of UK's worst pit disaster marked". BBC. 14 October 2013. Retrieved 15 April 2016.
  13. "Aberfan disaster: Poignant service marks 48 years since the tragedy that killed 144". Walesonline. 22 October 2014. Retrieved 15 April 2016.
  14. "Trapped Miners: Two Men Found Dead In Wales". Sky News. 16 September 2011. Retrieved 16 September 2011.
  15. John Graham Jones (15 November 2014). The History of Wales. University of Wales Press. pp. 122–. ISBN 978-1-78316-169-0.
  16. Robert Woods (5 October 2000). The Demography of Victorian England and Wales. Cambridge University Press. pp. 246–. ISBN 978-0-521-78254-8.
  17. 1 2 Arthur McIvor; Ronald Johnston (2007). Miners' Lung: A History of Dust Disease in British Coal Mining. Ashgate Publishing, Ltd. pp. 57–. ISBN 978-0-7546-3673-1.
  18. 1 2 Friedlander, D (1973). "Demographic Patterns and Socioeconomic Characteristics of the Coal-Mining Population in England and Wales in the Nineteenth Century". Economic Development and Cultural Change. 22 (1): 39–51.

External links

This article is issued from Wikipedia - version of the 11/30/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.