A 6 m long trench running downslope to the northwest. The trench itself is 2m wide with a 1m wide bank on either side. When visited during Upland survey in 2005, the vegetation cover over the feature was moss, grass and reeds. The feature may be a prospecting trench associated with the nearby Camdwr Bach mine. J.J. Hall, Trysor, 3 January 2006