C19th 3 bay barn with loft over cattle pen, stone flagged floor, king- post roof trusses, single large doorway. (RCAHMW)

Barn at side of present road. Approx. 20m x 6m. Entrance at east end. Window slits at north end and south end. Walls of mudstone with slate roof. Part of now submerged Dol-y-mynach farmstead. Located just above reservoir water level (RSJ 2000)

Additional: Farmhouse demolished c. 1910 = NPRN 30618. (RFS/2001)