G11 face at Big Pit Colliery
Underground roadway at Treforgan Colliery
Coal face at Treforgan Colliery
Roadway and conveyor at Treforgan Colliery
Haulage engine at Treforgan Colliery
Afternoon shift at Treforgan Colliery
Man riding train at Treforgan Colliery
Treforgan Colliery in 1979
Treforgan Colliery fan house
Surface view of an unknown colliery
Downcast headframe at an unknown colliery
Surface view of Six Bells Colliery
Torque Tension drilling rig at Six Bells Colliery
Headframes at Six Bells Colliery
High speed conveyor at Six Bells Colliery
Eimco machine at Six Bells Colliery
Chain haulage at Six Bells Colliery
Repairers at work at Six Bells Colliery
Underground locomotive at Coedely Colliery
Locomotive underground at Coedely Colliery
Underground at Coedely Colliery