The breakwaters are formed with two arms in massive stone and concrete structures with a light tower at their bullnose. Chambers and rooms were constructed within the breakwaters to accommodate the winches used to pull submarine nets across the entrance to the harbour during the Second World War.
CTP carried out a detailed condition survey of the structures, above and below sea level, to establish their condition. Deterioration of the internal chambers was identified which could, if left unhindered, compromise the breakwaters and Grand Harbour.
CTP designed refurbishment works and agreed their scope with the heritage section of Malta Environment and Planning Department.