Lambton Colliery, Durham
View of Lambton or Bournmoor Colliery, which is located east of Chester-Le-Street and south of Washington in County Durham. It was sunk in 1791. There is a tradition of coal mining in County Durham dating back to the 12th century. By the late 18th century it was a large, important industry. In the middle ages mines were open or shallow bell-shaped pits, but mines were getting deeper. They often needed pillars to support the roofs and a means of getting the coal to the surface. Coal was often exported and transported along a river or canal.