Collieries after Nationalisation in 1947

Dates in brackets indicate the date that the colliery merged with another
Name Opened Closed (Merged)
Abernant 1953 February 1988
Cwmgorse 1905 May 1964
Cwmllynfell 1905 January 1959
Daren 1935 October 1964
Felinfran 1935 December 1965
Gelliciedrim 1891 November 1957
Glanamman 1890 January 1948
Gwaun-cae-Gurwen, General 1886 October 1962
Gwaun-cae-Gurwen, East Pit 1910 October 1962
Gwaun-cae-Gurwen, Maerdy Pit 1886 January 1948
Gwaun-cae-Gurwen, Steer Pit 1924 January 1959
Hendy Merthyr 1930 November 1960
Normandy Level 1950 1950
Tylwydyn 1937 September 1949
Wernos 1905 November 1965
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