Tower Colliery (Welsh: Glofa'r Tŵr) was the oldest continuously working deep-coal mine in the United Kingdom, and possibly the world, until its closure in 2008.
But from 30 June 1986, with new underground roads having been driven, all coal from Mardy Colliery was also raised at Tower,[2] the two mines effectively working as one coalfield system.
[3] In October 1993 the red flag was raised on Hirwaun common as a symbol of unity between workers of Tower Colliery during a march to commemorate the Merthyr Rising in 1831, and highlight the plight of their own pit.
[4] In 1994, the constituency MP, Ann Clwyd staged a sit-in in the mine to protest against its closure, accompanied by the late Glyndwr 'Glyn' Roberts (Senior) of Penywaun.
British Coal closed Tower Colliery on 22 April 1994, on the grounds that it would be uneconomic in current market conditions to continue production.
Against stiff central government resistance to the possibility of reopening the mine as a coal production unit, a price of £2 million was eventually agreed.
Machinery from Tower was used to boost production at the nearby Aberpergwm Colliery, a smaller drift mine closed by the National Coal Board in 1985 but reopened by a private concern in the mid 1990s.
[10] The management announced at closure that one of the possibilities of creating additional short term value was through open cast mining extraction of the residual 6 million tonnes of anthracite.
The project will create a sloping landform to reproduce semi-natural habitats on the site, and hence prepare the area ground for future mixed-use development.