The Campos Novos dam in in Brazil is suffering massive structural failure only a few months after after its completion. Check out this picture. The structure is 200-metres tall and the reservoir behind it is nearly empty after leaking 4000 cubic metres of water per second (enough to fill an olympic sized swimming pool, so this article says). Apparently the dam has been leaking since it was first filled in October 2005. Although no one has been injured by the failure (there is another dam downstream that was able to staunch most of the flow), 750 families and 3,000 people have been displaced.