Porth Area

**Dates in brackets indicate the date that the colliery merged with another**
Name	Opened	Closed (Merged)
Abergorki	1918	August	1967
Cilely	1875	October	1950
Coedely	1910	(June)	(1977)	Merged with Cwm
Cwm	1909	November	1986
Cwmcynon	1889	January	1949
Ferndale, No.1	1857	August	1959
Ferndale, No.5	1885	August	1959
Gelli	1870	January	1962
Hafod	1850		1983
Lady Lewis	1904		1960
Lady Windsor	1884	(March)	(1975)
Lady Windsor-Abercynon	1884	February	1988
Lewis Merthyr	1850	(December)	(1960)
Llanharan	1922	August	1962
Llwynypia, No.4 [Pumping Station]	1925		1965
Maritime	1889	June	1961
National	1881	November	1968
Naval	1885	October	1958
Nebo	1924	July	1953
Penrhiwceiber	1872	October	1985
Trane	1915		(1952)
Tylorstown [Ferndale], No.9	1905	October	1960
Tymawr	1890	June	1983
Ynishir	1849		1960