Former Navigation Colliery Heapstead and Main Revetment Wall

The Heapstead and Revetment Wall is a high wall of rubble sandstone of regular height across the main terrace, sloping gradually to the lower ground level to right and here, faced with brick, carrying a track linking the road level with the main terrace. The two Winding Engine Houses are built directly onto the Revetment Wall on their E sides. Wall contains many iron fixings and putlog holes which formerly supported gantries and screens. Large semi-circular brick archway centre right now blocked led to the northern shaft and gave access for coal waggons. Fan Drift also enters the Heapstead to left, leading to the southern shaft. Chimney rises from centre rear.