Grassed over spoil heaps associated with Monk Bretton Colliery. The colliery was in operation between 1867 and 1968 (Hill 2006, 133-4) but the spoil heaps had not been marked with this extent until 1974 maps. The sinuous field boundaries on historic maps indicate that it was probably enclosed from woodland or common. There is fragmentary legibility of some former field boundaries at the edge of the spoil heaps.