Abertridwr, Caerphilly
…shafts to a depth of around 2,018 feet (615 m). The first coal was raised in 1902. The workings were connected underground to the Universal Colliery in Senghenydd for ventilation purposes. On 1 June 1902, a platform collapsed in the mine, tipping nine men into 25 feet (8 m) of water, which had gathered in the…