Collieries after Nationalisation in 1947

Dates in brackets indicate the date that the colliery merged with another
Name Opened Closed (Merged)
Aberaman 1843 November 1962
Aberaman Clay Level 1885 May 1949
Bwllfa Dare 1854 (February) (1957) Absorbed into Mardy
Cwmneol 1855 January 1948
Fforchaman 1850 September 1965
Mardy, Nos 3 & 4 1893 June 1986
New Drifts [Pumping] 1920 1950
Tir Herbert 1914 December 1958

Collieries closed prior to 1947

Abercwmboi Colliery Cynon Valley
Aberdare Collieries Aberdare
Abergwawr Colliery Aberdare
Abernant-Y-Groes Colliery Aberdare
Blaenant Colliery Aberdare
Blaengwawr Colliery Aberdare
Cwnaman Colliery Aberdare
Cwmbach Colliery Aberdare
Cwmdare Colliery Aberdare
Cwmpennar Colliery Mountain Ash
Duffryn Old Colliery Aberdare
Dyllas Colliery Aberdare
Fforchneol Colliery, also Fforchneol  Graig, Fforchwen, Bedwlwyn & Trewen Collieries
Gadlys Colliery Aberdare
George Pit Cwmpennar
Graig Colliery Aberdare
Glyngwyn Colliery
Hirwaun Colliery Hirwaun
Lletty Shenklin Colliery Aberdare
Llwynhelig Colliery Aberdare
Lower Duffryn Colliery Mountain Ash
Merthyr Dare Colliery Aberdare
Middle Duffryn Colliery Aberdare
No 9 Colliery Aberdare
River Level Colliery Aberdare
Treaman Colliery Aberdare
Tunnel Colliery Aberdare
Windber Colliery Aberdare
Yscuborwen Colliery  Aberdare

Small collieries of the Cynon valley

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