Blaenavon Area

**Dates in brackets indicate the date that the colliery merged with another**
Name	Opened	Closed (Merged)
Aberbeeg South	1925	December	1965
Abertillery New Mine	(1950s)	October	1985	Merger of Rose Heyworth & Cwmtillery
Big Pit	1890	(December)	(1960)
Blaendare Slope	1860		1978
Blaenserchan	1888	(August)	(1985)
Blaentillery	1967		1967
Blaenavon	1960	April	1980
Cwmtillery	1850	(November)	(1960)	Merged to form Abertillery New Mine
Cwmtillery Red Ash	1890		1950
Deakin’s Red Ash Level	1947	September	1956
Deakin’s Slope	1885	January	1957
Garn Slope	1930		1966
Glyntillery (old)	1914	(September)	(1959)
Glyn Pits	1843	October	1949
Gwenallt	1900		1947
Kay’s Slope	1878		(1953)	Merged with Garn Slope
Llanmarch	1908	June	1947
Llanerch	1858	September	1947
Llanhilleth	1860	March	1969
Milfraen	1865		1950	[Pumping Station]
Mynydd Maen	1912	October	1954
No.10 Slope	1885	January	1957
Rhiw Colbren No.2	1935	April	1950
Rhiw Colbren No.5	1938	October	1947
Rose Heyworth	1872	(November)	(1960)	Merged to form Abertillery New Mine
Six Bells	1898		(1970s)	Merged with Marine
South Wales	1850	(December)	(1960)
Tirpentwys	1878	(September	(1959)
Vivian	1889	(July)	(1958)	Merged with Six Bells