Collieries after Nationalisation in 1947

Dates in brackets indicate the date that the colliery merged with another
Name Opened Closed (Merged)
Blaenhirwaun 1908 August 1962
Carway 1855 July 1960
Carway Fawr 1986 November 1992
Cynheidre, Nos 1 & 2 1954 January 1989
Cynheidre, Nos 3 & 4 1962 January 1989
Glynhebog 1885 October 1949
Great Mountain, Nos 1 & 2 1887 May 1962
New Dynant [Training Centre] 1901 1952
New Lodge 1855 November 1949
Pentremawr 1893 (March) (1974)
Pwll 1860 January 1953
Trimsaran 1925 April 1954

Collieries that closed prior to 1947

Pont Henry 1820-1936

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