North Griffin No1 Colliery.
This deep colliery was situated in West Side Blaina (as seen on the map) more than probably owned and sunk by the Nantyglo and Blaina Company.
In 1878 the J. Lancaster Co took it over along with a few other other collieries in the Blaina area. In the late 1800s the West Blaina Red Ash Colliery opened on the mountain above and just South-West of the Griffin Colliery. The West Blaina Colliery was a level and had a tramway incline from its workings down into the Griffin Colliery grounds to have access to the railway sidings.
In July 1906 28 days notice were given to all 500 miners at the North Griffin Colliery, this was a consequence of a slump in the coal sales. The colliery re-opened and closed on many occasions during the following 12 months though eventually closed in April 1907. After the closure the tramway incline from the West Blaina Colliery was dismantled and diverted towards Coalbrookvale Colliery further North.
During the colliery’s lifetime it had tipped waste on the side of the mountain behind the houses at West Side, I’m not sure if the West Blaina Colliery added to the waste tip but as a consequence of this the area became unstable and many years later and in 1916 the Griffin waste tip slipped and demolished Alma Row. In October 1937 it was reported that the mountain side waste tip was still moving and was threatening Palmers Row and Lamb Row.