U.S. District Judge Katherine B. Forrest on Monday approved Anadarko Petroleum Corp.'s $5.15 billion settlement over its ill-fated acquisition of Tronox Inc., the final major hurdle in the federal government's largest environmental settlement ever, Dow Jones Daily Bankruptcy Review reported today. Judge Forrest said that Tronox 's bankruptcy judge was correct earlier this year when he signed off on the deal. Approval from the two judges was necessary for the settlement to be completed. In agreeing with Bankruptcy Judge Allan L. Gropper, Judge Forrest overruled two objections from claimants who thought the settlement was too low or that they deserved a greater share of the proceeds.