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Meiros Colliery, Llanharan
Probably opened during the early 1880's by the Gas Coal Collieries
In 1908 Meiros Nos.1 and 2 pits employed 409 men.
Meiros Collieries Ltd. took over the running of the mine in 1913 and by 1918 they were employing 622 men at the colliery.
From a list 1923, there were 720 men working at Meiros and Pentre, producing Gas and Manufacturing coal from the Pentre No.3 seam.
Closed around 1938.