Pongolapoort Dam, commonly referred to as Lake Jozini, is an arch type dam in northern KwaZulu-Natal, South Africa located on the Phongolo River. The dam is situated 280km north-east of the port city of Durban. The dam in was constructed in 1973 at the eastern end of the narrow gorge separating the Lebombo and Ubombo ranges and was the largest dam in South Africa at the time of its construction. The dam mainly serves for irrigation purposes and its hazard potential has been ranked high (3).