A trench running down slope, north northeast to south southwest. It measured 12m long and 3m wide. There was no visible spoil on either side of the trench. When visited during Upland survey in 2005, the vegetation cover over the feature was grass and moss. This feature may be a prospecting trench, part of the development of Cwmrhaiadr lead mine, NPRN 402599. J.J. Hall, Trysor, 23 December 2005