NEHL - New Copley Colliery was sunk in the 1860s close to the Cockfield coal field. It was connected by tramway to the coke ovens on the Barnard Castle Railway, where coal was exported via a group of sidings. There was one shaft, winding machine and a large reservoir adjacent. The boundary of the site can still be seen as well as what looks like a slag heap, but much of it is reclaimed land.