Aberamman Colliery, Aberdare, 1855
Explosion. 5 died.

Aber Colliery, Ogmore Vale, 1888
Underground fire. 5 died.

Abercomby Colliery, Aberdare, 1870
Explosion. 5 died.

Aberfan Tip, Merthyr Tydfil, 1966
No 7 tip of Merthyr Vale Colliery slipped down the steep hillside and engulfed houses and a school in Aberfan village. 28 adults and 116 children died and a further 6 adults and 29 children were injured.

Albion Colliery, Pontypridd, 1894
Explosion. 289 died.

Albion Colliery. Pontypridd, 1906
Methane explosion caused by sparks from a battery. 8 died,

Birchrock Colliery, Pontardulais, 1909
Methane explosion caused by the use of a naked light. 5 died.

Black Vein Ironstone Mine, Aberdare, 1848
Shaft Accident. 13 died.

Blaenclydach Colliery, Blaenclydach, 1941
In the morning when the shift was being lowered down the pit, down a road which dipped nine inches to the yard by an electric haulage engine, the tubs got out of control and gathered speed down the dip. 5 died & 70 injured.

Blaengwawr Colliery, Aberdare, 1861
Explosion. 13 died & 5 injured.

Blaengwynfi Colliery, Garw Valley, 1891
Shaft Accident during sinking. 8 died.

Bedwelty Colliery, Tredegar, 1879
Explosion. 6 died.

Broadoak Colliery, Loughor, 1897
Explosion, thought to be caused by the opening of a safety lamp. 5 died.

Bryn Cethin Colliery, Bridgend, 1874
Shaft accident during sinking. 5 died.

Bryncoch Main No 1 Colliery, Neath, 1896
Explosion. 7 died.

Brynddu Colliery, Pyle, 1853
Explosion. 5 died.

Brynddu Colliery, Pyle, 1858
Explosion. 12 died.

Bwllfa Colliery, Aberdare, 1867
Underground Fire. 5 died.

Cae Colliery, Llanlley, 1858
Inrush of water from old workings. 10 died.

Cambrian Colliery, Clydach, 1905
Methane Explosion. 33 died & 11 badly burnt.

Cambrian Colliery, Rhondda, 1965
Methane Explosion. 30 died.

Charles Colliery, Llansamlet, 1870
Explosion. 19 died.

Cinder Pits, Blaenavon, 1838
Flooding caused by torrential rain and deep snowfall. 16 died.

Coedcae Colliery, Pontypridd, 1882
Explosion. 5 died.

Court Herbert Colliery, Neath, 1906
Methane explosion caused by a gob fire. 5 died.

Cwmamman Colliery, Aberdare, 1855
Shaft Accident. 8 died.

Cwmynantddu Colliery, Pontypool, 1849
Explosion. 5 died.

Cwngwrach Colliery, Neath, 1820
Explosion. 5 died including 2 girls aged 6 & 12.

Cwnllyn Colliery, Swansea Valley, 1825
Explosion. 59 died.

Cyfing Colliery, Swansea, 1858
Explosion. 6 died & 3 injured.

Cymer Colliery, Rhondda Valley, 1856
Explosion. 114 died.

Darran Colliery, Deri, 1909
Explosion of coal dust caused by shot firing. 22 died.

Deep Navigation Colliery, Treharris, 1902
Shaft Accident. 5 died.

Dinas Colliery, Llantrisant, 1879
Explosion, the result of incompetent management. 63 died.

Dinas Main Colliery, Gilfach Coch, 1907
Coal dust explosion caused by shotfiring. 7 died.

Dinas Middle Pit, Glamorganshire, 1844
Explosion. 12 died & 3 injured.

Dowlais Colliery, Cardiff, 1893
Shaft Accident. 8 sinkers died.

Dowlais Colliery, Aberdare, 1895
Shaft Accident. 6 died.

Dowlais Colliery. Cardiff, 1906
Coal tubs ran away after a link broke. 5 died.

Eaglesbush Colliery, Neath, 1848
Explosion. 20 died.

Elba Colliery, Gowerton, 1905
Methane explosion. 11 died.

Ferndale Colliery, Porth, 1867
Explosion. 145 died.

Ferndale Colliery, Rhondda Valley, 1869
Explosion. 53 died.

Ferndale Colliery Tylorstown Pit, Rhondda Fach, 1896
Explosion. 57 died & 3 injured.

Fire Engine Colliery, Neath, 1795
Explosion, 20 died.

Fochriw Colliery, Gellingaer, 1902
Methane explosion cause by the use of a naked light. 8 died.

Gadlys Colliery, Aberdare, 1871
Explosion. 4 died.

Garnant Colliery, Cwmaman, 1884
Shaft Accident. 11 died.

Garnoch Colliery, Swansea, 1880
Explosion. 6 died.

Garth Merthyr Colliery, Maesteg, 1897
Shaft Accident.

Gelli Colliery, Ystrad, 1883
Explosion. 5 died & 1 injured.

George Pit, Mountain Ash, 1886
Accident. 5 died.

Gethin Colliery, Merthyr, 1862
Explosion. 47 died.

Gethin Colliery, Merthyr Tydfil, 1865
Explosion. 38 died.

Glenavon Colliery, Rhondda, 1900
Water inrush from old flooded workings. 5 died.

Great Western Colliery, Rhondda, 1893
Suffocation caused by an underground fire. 61 died.

Gwendraeth Colliery, Pontyberem, 1855
Inrush of quicksand. 27 died.

Hendreforgan Colliery, Swansea Valley, 1869
Explosion. 6 died.

Letty Shanklin Colliery, Aberdare, 1849
Explosion. 52 died.

Lewis Merthyr Colliery, Pontypridd, 1882
Explosion. 6 died.

Lewis Merthyr Colliery Trehafod, 1956
Methane Explosion caused by a roof fall which brought the gas down. Ignition was caused by sparks created as stones struck the steel arches. 9 died & 5 injured.

Llan Colliery, Cardiff, 1875
Explosion. 15 died & 6 injured.

Llanbradach Colliery. Cardiff, 1901
Methane explosion. 11 died.

Llansamlet Colliery, Swansea, 1788
Methane Explosion  cause by naked lights. 13 died from the effects of afterdamp.

Llantwit Colliery, Pontypridd, 1849
Shaft Accident, 7 died.

Llest Colliery, Pontyrhyl, 1899
Explosion. 19 died & 5 injured.

Llwynypia Colliery, Porth, 1932
Methane Explosion. 10 died & 2 injured.

Llynvi Colliery, Maesteg, 1863
Explosion. 13 died.

Lower Duffryn Colliery, Aberdare, 1858
Explosion. 19 died.

Lower Duffryn Colliery, Aberdare, 1860
Explosion. 33 died.

Maesteg Merthyr Colliery, Bridgend, 1872
Explosion. 11 died.

Main Colliery, Neath, 1859
Inrush of water from old flooded workings. 26 died.

Mardy Colliery, Rhondda Valley, 1885
Explosion. 79 died & 7 injured.

Meadow Pit, Cwnavon, 1878
Shaft Accident – rope broke while winding. 6 died.

Middle Duffryn Colliery, Aberdare, 1850
Explosion. 13 died.

Middle Duffryn Colliery, Aberdare, 1852
Explosion. 64 died

Morfa Colliery, Port Talbot, 1863
Explosion. 38 died.

Morfa Colliery, Port Talbot, 1870
Explosion. 25 died.

Morfa Colliery, Port Talbot, 1890
Explosion. 81 died.

National Colliery, Pontypridd, 1887
Explosion. 43 died.

National Colliery, Wattstown, 1905
Methane Explosion. 112 died.

Naval Colliery, Llantrisant, 1884
Explosion. 11 died.

Naval Colliery Ely Pit, Penycraig, 1909
Shaft Accident. 7 died.

New Duffryn Colliery, Aberdare, 1850
Methane Explosion caused by a sudden outburst of gas ignited by a naked light. 8 died & 8 injured.

New Duffryn Colliery, Rhymney, 1883
Explosion caused by naked lights and a fall of roof releasing gas. 6 died & 8 injured.

Oakwood Colliery, Maesteg, 1872
Explosion. 10 died.

Ogmore Colliery, Bridgend, 1874
Shaft explosion during sinking. 5 died.

Old Duffryn Colliery, Aberdare, 1844
Explosion. 29 died.

Park Colliery, Neath, 1863
Explosion. 6 died.

Park Slip Colliery, Tondu, 1892
Explosion. 112 died.

Pentre Colliery, Rhondda Valley, 1871
Explosion. 22 died.

Pen-Y-Craig Colliery, Rhondda, 1880
Explosion. 100 died.

Penycraig Colliery, Penycraig, 1884
Explosion. 14 died.

Pochin Colliery, Tredegar, 1884
Explosion. 14 died.

Ponthenry Colliery, Lllanelly, 1924
Five men died due to suffocation by gas.

Primrose Colliery, Swansea, 1858
Suffocation by fumes from the engine boiler. 10 died.

River Level Colliery, Abernant, 1896
Inrush of water. 6 died.

Seven Sisters Colliery, Merthyr, 1907
Methane explosion. 5 died.

St David’s Pit, Llanelli, 1840
Explosion. 5 died & 26 injured.

Tarnei Colliery, Pontardawe, 1909
Inrush of water from old flooded workings. 5 died & 4 injured.

Tower Colliery, Hirwaun, 1962
Methane explosion caused by arching resulting from a short circuit to earth in a newly inserted length of cable serving the electrical equipment in the heading. 9 died & 9 injured.

Troehydriw Colliery, Porth, 1877
Inrush of water from old flooded workings. 5 died, but others were saved after being trapped by water for days.

Try Nicholas Colliery, Cwmtelery, 1857
Explosion. 13 died.

Tynybedw Colliery, Pentre, 1895
Shaft Accident. 6 died.

Universal Colliery, Senghenydd, 1901
Methane Explosion. 80 died.

Universal Colliery, Senghenydd, 1913
Methane Explosion. 439 men & boys died.

Vochrhiw Colliery, Dowlais, 1870
Shaft Accident. 5 died.

Waunddu Colliery, Swansea, 1788
Methane Explosion caused by naked lights. 6 died.

Weighfach Colliery, Swansea, 1877
Explosion caused by negligence. 18 died.

Werfa Colliery, Aberdare, 1849
Explosion. 5 died & 12 injured.

Werfa Colliery, Aberdare, 1851
Shaft Accident. 16 died.

Wernfraith Colliery, Neath, 1758
Explosion, 10 died.

Wernfraith Colliery, Neath, 1770
Methane Explosion caused by naked lights. 17 died.

Wernbwll Colliery, Penclawdd, 1929
Methane explosion cause by the use of naked lights. 7 died.

Winch Pond Colliery, Neath, 1764
Explosion, 18 died.

Winch Pond Colliery, Neath, 1779
Explosion, 11 died.

Windsor Colliery, Abertridwr, 1902
Staging the the shaft collapsed during sinking. 6 died.

Yniscedwin Colliery, Swansea Valley, 1892
Shaft Accident. 7 died.

Ynisdavid Colliery, Cwmavon, 1856
Explosion. 8 died.

(Unnamed) Colliery, Near Llanelli, 1827
Explosion. 13 men burned.

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