Wolwedans dam is a 70 m high RCC arch/gravity dam situated on the Great Brak River near Mossel Bay in the Southern Cape in South Africa. A groutable system of induced crack joints was developed to deal with the potential cracks caused by shrinkage of RCC. The groutable “joints” and the model studied stepped spillway with relative short apron are of the unique features of the dam.

The project is owned by the Department of Water Affairs and Forestry (DWAF).