Underground at Cwmtillery Colliery
Pit bottom at Cwmtillery Colliery
Coal drams at Cwmtillery Colliery
Cwmtillery Colliery pit bottom
Underground at Bedwas Colliery
Shaft at Bedwas Colliery
Manriding train at Bedwas Colliery
Pit bottom at Bedwas Colliery
Hydraulic props at Wyndham Colliery
Shearer at Wyndham Colliery
Haulage engine at Wyndham Colliery
Underground at Wyndham Colliery
Manriding train at Wyndham Colliery
Underground track at Wyndham Colliery
Roadway at Wyndham Colliery
Pit bottom at Wyndham Colliery
Gullick chocks at Blaenant Colliery
Shearer at Blaenant Colliery
Underground roadway at Blaenant Colliery
Conveyor belt at Blaenant Colliery