An infilled level on the west-facing slope of Moel Dyffryn, part of Nant Hir Level coal mine, NPRN 516897. The remaining gully is 10 metres east-west by 1.5 metres wide and 1 metre deep. A revetted entrance gully is shown on the 2nd edition Ordnance Survey map of 1899, close to air shaft NPRN 516552. The spoil heap to the west southwest includes some red brick. J.J. Hall, Trysor, 19 February 2012
