Lambton D Pit, firebrick and sanitary-pipe works

1894-1960. High-quality fireclay goods were produced for the Lambton collieries. There were four Newcastle kilns (each holding 8000 bricks); seven circular downdraught kilns (each holding 18,800 bricks) with an internal diameter of 20 feet, each with six fireholes and two wickets; an 18-chamber Belgian-type continuous kiln, known here as a Bastard Hoffman kiln (each chamber holding 6600 bricks), with a chimney 125-feet high.