Collieries after Nationalisation in 1947

Dates in brackets indicate the date that the colliery merged with another
Name Opened Closed (Merged)
Abergelli 1930 1947
Broad Oak 1869 May 1948
Bryn-Lliw 1903 (1977)
Garngoch, No.1 1870 April 1952
Garngoch, No.3 1906 February 1966
Morlais 1894 (June) (1977)
Mountain 1903 November 1969
Mynydd Newydd 1843 June 1955
Wernfawr West 1940 May 1949
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