A stone lined adit entering the hillside horizontally from the top of the associated spoil heap (below) presumably consisting of material excavated from the chamber. The adit is entered by way of a low arched roughly keyed entrance of slabby rock about 1.3m high and 1.25m wide. Depth not determined but at least 25m or so visible and quite probably considerably more. Immediately in front of the adit is the large area of spoil forming a level terrace on what would otherwise have been a steeply sloping hillside. Consists of quite finely graded black anthracite waste. Overall area of spoil about 90m x 30m. The site is 45 - 50m above O.D.
