Work commenced in 1859, only completed in 1864 at a cost of £76,000. It has tapering hexagonal ramparts with pentagonal bastions at the angles. It is surrounded by a large clear are of sloping ground to the front, and a ditch on the south side. It contained eleven 9-inch 12 ton rifled muzzle loaded guns in casemates, and ten guns in open emplacements. The barracks located at the rear could house ten officers, five staff sergeants and 158 other ranks. Facilities included a canteen, wash rooms and a hospital. It comprises two batteries, Moncrieff Battery on the west side and Open Battery on the north. Abandoned at the start of the 20th century it was used again during the Second World War.
The fort is currently classified as Private Property.
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