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The South Wales Coalfield (Welsh : Maes glo De Cymru) extends across Pembrokeshire, Carmarthenshire, Swansea, Neath Port Talbot, Bridgend, Rhondda Cynon Taf, Merthyr Tydfil, Caerphilly, Blaenau Gwent and Torfaen. [1] It is rich in coal deposits, especially in the South Wales Valleys.
The area comprises a fully exposed synclinorium which gave rise to dramatic upland areas (Welsh: Mynydd) rising to 300–600 metres above sea level, and intersected by steep-sided valleys in which most of the area's deep mines were developed. The coal measures (Upper Carboniferous/Pennsylvanian) are thick, workable seams in the lower parts and generally thinner and sparser seams in the upper parts, with a development of sandstones (Pennant Sandstone) much used in local construction, (including the characteristic terraced houses).
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.
Ways along the valley floors provided the main routes for exporting coal south to ports and docks such as Newport Docks, Cardiff Docks and Barry Docks.
Early mining 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 became significant in the previously entirely rural Rhondda Valley. Coal was moved from mines on tramways to canals such as the Swansea Canal and Glamorganshire Canal. These were supplemented, and then superseded, by numerous competing railways which fed the docks at Swansea, Cardiff, Newport, Llanelli and Barry.
Later colliery shafts were sunk as deep as 800 yards (730 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] Oil, having higher energy density than coal, allowed larger and faster warships, and being easily piped, was easier to supply to ships at sea.
By the start of World War I, both the Queen Elizabeth-class and the Revenge-class battleships were partly oil-fired: oil was used mainly for both quick-start steaming, and sprayed on burning coal to extend their range. A number of cruiser and destroyer classes produced since 1904 also used oil. However, by the time of the Battle of Jutland in May/June 1916 still only a sixth of the Grand Fleet was oil-fired. Further, that summer the British suffered a number of losses of oil tankers, and had to instruct oil-fired ships to restrict their fuel consumption and hence speed. When the United States entered the war in April 1917, the British instructed the United States Navy to send only coal-fired ships to assist them. To assist the Royal Navy, from the outset of the war the Government and railway companies ran what were termed "Jellicoe Specials", high-speed coal carrying freight trains that ran from South Wales to north-east Scotland, and then by ship to Scapa Flow. Initially running to Dingwall, they then were also shipped to Scrabster through Thurso. However, inadequate capacity in port and rail facilities at these locations meant that from January 1915, all naval ordnance (other than ammunition) and medical supplies were sent by rail to Aberdeen, and from mid-1915 Grangemouth. By the end of WWI, the Royal Navy had 33 dreadnoughts and 9 battle cruisers, with 10 and 2 respectively entirely oil fuelled.
However, after WWI, the move to oil-firing was quickly extended to other areas, including the railways, which was a key strategic factor in the economic hardship which struck the coalfield after the war. Coal workings were over-expanded in the late nineteenth century, [4] and 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.
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.
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.
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 Merthyr Tydfil, in the northern part of the coalfield, 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, valleys that had previously been sparsely inhabited 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]
The coal mines were employing 250,000 men by 1921, [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]
The South Wales Coalfield was notorious for the number of fatal accidents in the 19th century. [9]
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 died, and in 1880 when 119 people died. [11]
The Prince of Wales colliery in Abercarn exploded in 1878 causing 268 deaths. [11]
The Llanerch Colliery in Abersychan exploded in 1890 causing 176 deaths. [11]
The Albion Colliery in Cilfynydd exploded in 1894 causing 276 deaths. [11]
In the 20th century there were numerous further fatal accidents.
The Universal Colliery in Senghenydd had Britain's worst mining accident when it exploded in 1913 killing 431. [12]
In 1966, 116 children and 28 adults were killed in Aberfan when a coal spoil tip collapsed onto them. [13]
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. [14]
Coal mining in the South Wales Coalfield was a dangerous occupation with lifelong health implications. [15]
Between 1849 and 1853, 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 adverse health effects of coal dust and the amount it was costing them to compensate miners working at the coalface. [17] Pneumoconiosis proved to be a particular problem for miners in South Wales, accounting for almost 90% of the total cases for the whole of the UK in both 1939 and 1945, and with more than 25% of the South Wales mining labour force affected between 1959 and 1963. [17]
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 restricted women from underground working. [18] It has been suggested that this explains the lower marriage age and higher fertility of women in the coalfield. [18]
Until 1974, Glamorgan, or sometimes Glamorganshire, was an administrative county in the south of Wales, and later classed as one of the thirteen historic counties of Wales. Originally an early medieval petty kingdom of varying boundaries known in Welsh as Morgannwg, which was then invaded and taken over by the Normans as the Lordship of Glamorgan. The area that became known as Glamorgan was both a rural, pastoral area, and a conflict point between the Norman lords and the Welsh princes. It was defined by a large concentration of castles.
Ynysybwl is a village in Cwm Clydach in Wales. It is situated in the county borough of Rhondda Cynon Taf, roughly 15 miles (24 km) north-north-west of Cardiff, 4 miles (6 km) north of Pontypridd and 16 miles (26 km) south of Merthyr Tydfil, and forms part of the community of Ynysybwl and Coed-y-Cwm.
South Wales is a loosely defined region of Wales bordered by England to the east and mid Wales to the north. Generally considered to include the historic counties of Glamorgan and Monmouthshire, south Wales extends westwards to include Carmarthenshire and Pembrokeshire. In the western extent, from Swansea westwards, local people would probably recognise that they lived in both south Wales and west Wales. The Brecon Beacons National Park covers about a third of south Wales, containing Pen y Fan, the highest British mountain south of Cadair Idris in Snowdonia.
The South Wales Valleys are a group of industrialised peri-urban valleys in South Wales. Most of the valleys run north–south, roughly parallel to each other. Commonly referred to as "The Valleys", they stretch from Carmarthenshire in the west to Monmouthshire in the east; to the edge of the pastoral country of the Vale of Glamorgan and the coastal plain near the cities of Swansea, Cardiff, and Newport.
Abernant is a small village north-east of the town of Aberdare, Rhondda Cynon Taf, Wales. Like many in the South Wales Valleys, it was once a coal-mining village.
Cwmdare is a village very close to Aberdare, in Rhondda Cynon Taf, Wales. The village's history is intertwined with coal-mining, and since the decline of the industry in the 1980s, it has become primarily a commuter base for the larger surrounding towns of Aberdare and Merthyr Tydfil and Pontypridd, as well as the cities of Cardiff and Swansea.
Treharris is a small town and community in the Taff Bargoed Valley in the south of Merthyr Tydfil County Borough, South Wales. It is located about 0.6 miles (1.0 km) west of Trelewis, from which it is separated by the Taff Bargoed river, and 0.9 miles (1.4 km) from Nelson in Caerphilly county borough and has a population of 6,356 from the 2011 Census. As a community, Treharris includes the villages of Quakers Yard and Edwardsville. Due to steepness and narrowness of both the Taff and Taff Bargoed valleys at Treharris several notable bridges and viaducts have been built in the area.
Ton Pentre is a village in the Rhondda Valley in the county borough of Rhondda Cynon Taf, Wales. Historically part of Glamorgan, Ton Pentre, a former industrial coal mining village, is a district of the community of Pentre. The old district of Ystradyfodwg was named after the church at Ton Pentre. Ton Pentre is, perhaps, best known for an event in 1924, when the Duke of York played a round of golf with Trade Unionist Frank Hodges.
William Abraham, universally known by his bardic name, Mabon, was a Welsh trade unionist and Liberal/Labour politician, and a member of parliament (MP) from 1885 to 1920. Although an MP for 35 years, it was as a trade unionist that Abraham is most well known. Initially a pioneer of trade unionism, who fought to enshrine the principle of workers' representation against the opposition of the coal-owners, he was regarded in later life as a moderate voice believing that disputes should be solved through conciliation rather than industrial action. This drew him into conflict with younger and more militant leaders from the 1890s onwards. Although the defeat of the miners in the Welsh coal strike of 1898 was a clear defeat for Mabon's strategy, his prestige was sufficient to ensure that he became the first president of the South Wales Miners' Federation which was established in the wake of the dispute. Abraham was noted for his powerful speaking voice, and was a renowned orator in English and Welsh.
Rhondda Heritage Park, Trehafod, Rhondda, South Wales, is a tourist attraction which offers an insight into the life of the coal mining community that existed in the area until the 1980s.
Mining in Wales provided a significant source of income to the economy of Wales throughout the nineteenth century and early to mid twentieth century. It was key to the Industrial Revolution in Wales, and to the whole of Great Britain.
Cefn Coed Colliery Museum is a former coal mine, now operating as a museum. It is located at Crynant near Neath in the South Wales Valleys.
The Taff Bargoed is a river and valley near Pontypridd in South Wales, and lies off the Abercynon roundabout on the A470 road, and is approximately 14 miles from Cardiff. The main settlements are Nelson, Edwardsville, Quakers Yard, Treharris, Trelewis, and Bedlinog. The valley is situated where the three County Boroughs of Caerphilly, Rhondda Cynon Taff, and Merthyr Tydfil meet.
Abercynon Colliery was a coal mine located in Abercynon, South Wales. Opened in 1889, it closed in 1988.
Maerdy Colliery was a coal mine located in the South Wales village of Maerdy, in the Rhondda Valley, located in the county borough of Rhondda Cynon Taf, and within the historic county boundaries of Glamorgan, Wales. Opened in 1875, it closed in December 1990.
Deep Navigation Colliery was a coal mine in South Wales, that operated from 1872 until 1991.
Rhondda Cynon Taf is a county borough in South Wales. It is located to the north-west of Cardiff and covers an area of 424 km2 (164 sq mi). In 2021 the population was approximately 237,500.
The coal industry in Wales played an important role in the Industrial Revolution in Wales. Coal mining in Wales expanded in the 18th century to provide fuel for the blast furnaces of the iron and copper industries that were expanding in southern Wales. The industry had reached large proportions by the end of that century, and then further expanded to supply steam-coal for the steam vessels that were beginning to trade around the world. The Cardiff Coal Exchange set the world price for steam-coal and Cardiff became a major coal-exporting port. The South Wales Coalfield was at its peak in 1913 and was one of the largest coalfields in the world. It remained the largest coalfield in Britain until 1925. The supply of coal dwindled, and pits closed in spite of a UK-wide strike against closures. Aberpergwm Colliery is the last deep mine in Wales.
James Harvey Insole JP was an English businessman who consolidated and developed the extensive South Wales coal mining and shipping business begun by his father George Insole.
The Industrial Revolution in Wales was the adoption and developments of new technologies in Wales in the 18th and 19th centuries as part of the Industrial Revolution, resulting in increases in the scale of industry in Wales.
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