NEHL - Millfield Grange Colliery was one of the copious workings found on Cockfield Fell during the late 19th century coal rush. Like most of the others, this too was primite, with few auxiliary buildings with a central shaft. There was a tramway leading to the Haggerleases branch, with much of the alignment inherited from an older drift just east. A smaller tramway unconnected led to another drift west, just north of Cockfield Station.

Nowadays the working isnt visible, though the earthworks for the tramway is as well as the small slag heap.