A jury awarded the damages against former smelter owners Fluor Corporation, A.T. Massey Coal and Doe Run Investment Holding Co after a three-month trial in 2011.

The St. Louis Post-Dispatch (bit.ly/1pgOoWj) reports that the Missouri Court of Appeals’ Eastern District ruled Tuesday that an error in jury instructions requires fresh consideration off Fluor’s portion of the damages award. The jury awarded a total of $320 million in punitive damages and another $38 million in compensatory damages

Those awards came on top of a confidential settlement reached before the trial with the smelter’s current owners, Doe Run Resources Corp.

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Information from: St. Louis Post-Dispatch, http://www.stltoday.com