A wall 25m long SW-NE at the SE corner of the reservoir, of rubble stone and boulders, standing up to 1.1m high. The wall is built against high rock to the NE end (at SH 56546 44346). Probably associated with other walls to W (nprn 532506, 532505) that belonged to fields drowned when the reservoir was created.
Recorded as part of RCAHMW Uplands Initiative Project, W B Horton, H & H, 28/02/2013.