Vaal Dam

(from the article `Vaal River`) ...a shallow bed. Most of the year its flow is minimal, but the winter months can create the muddy torrent for which the Vaal (`Gray-brown`) is ...
Found on http://www.britannica.com/eb/a-z/v/1

Vaal Dam

The Vaal Dam in South Africa was constructed in 1938 and lies 77 km south of OR Tambo International Airport. The lake behind the dam wall has a surface area of about {convert|320|km2} and is 47 meters deep. The Vaal Dam lies on the Vaal River, which is one of South Africa`s strongest-flowing rivers. Other rivers flowing into the dam are the Wilge....
Found on http://en.wikipedia.org/wiki/Vaal_Dam
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