Blaenserchan Colliery was sunk by Partridge Jones & Co. Ltd in 1890. The first shaft to be sunk only went to the Old Coal Level, but was deepened in 1899. The Downcast was sunk in 1915, with a depth of 354 yards and a 20 ft diameter. Before 1915 air was obtained from Llanerch downcast.
The main winding engine was a Worsley Mesnes with 30 inch cylinders and a 5 ft stroke.It could wind 700 tons per shift. The shaft had a single deck cage which held up to 16 men.
Seams worked at Blaenserchan were The Elled, Big Vein,Threequarter, Black Vein, Meadow Vein, Old Coal and Garw.
In 1970 coal winging ceased at Blaenserchan and for some years all coal was transported underground through Tirpentwys Colliery to Hafodyrynys Colliery for washing and dispatch to British Rail. Eventually the Colliery became part of a £2.5m link up between three pits centred on Marine Colliery, Ebbw Vale. The final working day at Blaenserchan Colliery, the last working pit in Torfaen was August 8th 1985.
