Darlington Dam, also referred to as Lake Mentz. is a gravity type dam situated in the Sundays River, near Kirkwood, in Eastern Cape, South Africa. It was established in 1922 and was renovated in 1952. The dam has a capacity of 187,000,000 cubic metres (6.6×10⁹ cu ft), with a 35.3 metres (116 ft)-high wall.