Hydro-accumulator tower at Briton Ferry Docks

The building survives as a roofless shell, of which the exterior walls are substantially covered with vegetation. It is a tall 3-stage tower square in plan, of snecked rock-faced stone with a projecting plinth and an eaves cornice projecting on a corbel table. On the W side facing the docks is a round-headed window in the middle stage with part of its iron-frame glazing remaining in situ. On the opposite E side is similar middle-stage window with key and impost blocks, and a round-headed doorway in the lower storey with similar details. The N and S sides both have narrow openings at plinth level, blocked on the S side.

Inside there are a pair of closely spaced timber beams immediately below the top of the wall, while below it in the N and S walls are the infilled sockets of 3 other similar pairs of beams. Although the structure is roofless a triangular boarded panel of a former shallow hipped roof lies across the top of the structure.