Engineering News 1 July 2011.

South African power utility Eskom has contracted 80% of its cumulative coal supply up to 2020, but CEO Brian Dames said on Friday that rising coal prices and competing export markets were growing concerns…

http://www.engineeringnews.co.za/article/eskom-says-80-of-coal-contracts-secured-up-to-2020-2011-07-01