The 1998 failure of the tailings dam at the Los Frailes mine wreaked widespread environmental havoc. The toxic mine wastes that were released caused a massive fish kill, damaged thousands of acres of farmland, threatened a United Nations World Heritage Site and eliminated 5,000 local jobs. The Government of Spain spent $275 million cleaning up the waste. The company is challenging a high court decision awarding the government $74 million in compensation and damages.
 Patterson, Kelly. Into the Final Frontier: in the race for resources, Canadian mining firms are leading the charge into environmental hotspots. The Ottawa Citizen. October 2, 2005 (hereinafter Patterson).
 United Nations Environment Programme Mineral Resources Forum. http://www.mineralresourcesforum.org/incidents/Losfrailes/index.htm>