Hafodyrynys is a village on the A472 road between Pontypool and Crumlin in Caerphilly county borough, south-east Wales.

[1] In 2021, following extensive investigation and compulsory purchase of the affected properties, the terraced housing directly on the A472 was demolished due to the level of air pollution observed on the road.

Crumlin Viaduct was closed and then dismantled from 1967 onwards, resulting in coal from the colliery being extracted via the junction with the Ebbw Valley Railway.

The mine closed in 1966 but the washery continued to process coal from the others, brought underground and raised through the Glyntillery drift.

[5] The site was cleared in 1985, but the circular slimes settling tank of the washery was retained at the request of the landowner, Sir Richard Hanbury-Tenison.