This is the site of Mount Moor Colliery, Vale Pit. It opened before 1826 and closed in May 1931.

In the 1850s the colliery was owned by John Bowes & Co, and later by the Marley Hill Coal Co. Mount Moor Colliery was probably operating by the early 18th century, since references in Washington Parish registers show that as early as 1729 The Mount was inhabited by pitmen. Some of these workings had been abandoned by 1782, but the colliery is known to have been working in the mid-19th century, notably at Vale Pit.

It was surrounded by a number of other small pits just south, though it isn't conclusive whether they were connected. This includes Hill Pit, Borehole Pit and Boundary Pit.

NEHL - The site was located next to the famous Bowes Railway, with its hauling house and engine house standing just south east of the pit. Few notable features still exist and if there were they are hidden by the wood which has grown in its place. The pit heap and pit ponds appear to have gone, though the spur from the Bowes railway still appears recognisable on satellite imagery.