Roadway at Graig Merthyr Colliery
Drams at Graig Merthyr Colliery
Winding engine at Graig Merthyr Colliery
Underground roadway at Graig Merthyr Colliery
Unsupported roof at Graig Merthyr Colliery
Roadway under development at Graig Merthyr...
Locomotive at Graig Merthyr Colliery
Entrance to the drift mine at Graig Merthyr...
Empty drams at Graig Merthyr Colliery
Surface buildings at Graig Merthyr Colliery
NCB lorry at Graig Merthyr Colliery
Coal drams at Graig Merthyr Colliery
Graig Merthyr Colliery yard
Surface at Graig Merthyr Colliery
Underground roadway at Coegnant Colliery
Conveyor underground at Coegnant Colliery
Dram at pit bottom at Coegnant Colliery
Chain hauled shearer at work at Coegnant Colliery
Prop and bar face at Coegnant Colliery