A conservative estimate is 430kms. I used Google Earth measuring tool and plotted all round from Deneysville bridge going 360 degrees around. Excluding all river areas.
Vaal Dam was created in 1938.
the vaal dam
From the Vaal dam and also from Lesotho.
The vaal dam is actually in two provinces of south Africa. It forms the border between Gauteng and the Free State.
The Biggest Dam is the Vaal Dam but i'm not sure about the biggest lake. Lake = natural Dam = man made
Gariep Dam
Johannesburg receives its water mostly from the Vaal dam and also, through the Lesotho Highlands Water Project, it also receives water from the Katse Dam in Lesotho.
Papdi
The largest dam is the Vaal dam at 2.536 cubic kilometres and a surface area of 320 square kilometres (120 sq miles) Three provinces make up the Dam's shoreline - the Free State is the largest by area, Mpumalanga has a beautiful and relatively unspoilt shoreline, while the most developed is that of Gauteng Province.
Rettai Vaal Kuruvi was created in 1987.
The Vaal River is the largest tributary of the Orange River in South Africa.
Vaal is not battleable in Dragonfable, however you can talk to him in one Ravenloss' cut scenes.