Abercarn Colliery
1878 The Abercarn colliery disaster was a catastrophic explosion within the Prince of Wales Colliery in the Welsh village of Abercarn (then in the county of Monmouthshire), on 11 September 1878, killing 268 men and boys (though an exact number of casualties remains unknown). The mine did not reopen until 1882.[1]
1883 The pit was acquired by Watts, Ward and Co
1891 The Abercarn Collieries and the Risca Collieries were merged with the National Collieries in the Rhondda Valley under the title of United National Collieries.