The U.S. government has studied the longest oil spill in history — 14 years after the leak began

The federal government’s first study of the nearly 15-year-long oil spill in the Gulf of Mexico estimates that up to 108 barrels per day — more than 4,500 gallons — is flowing from a site where an oil company’s platform and wells were destroyed during a hurricane.

Monday’s report, by two scientists at the National Oceanic and Atmospheric Administration and a Florida State University professor, joined several others in disputing the company’s claim that only one drop of oil per minute is being released from a small area covered in mud, amounting to less than three gallons each day.

“The results of this study contradict these conclusions by the Taylor Energy Company,” the authors said. The government’s findings also differ from those of three studies last year that said the flow of oil from the site was substantially higher.

Geoscientist Oscar Garcia-Pineda estimated that between 250 and 700 barrels per day — up to 29,000 gallons — are flowing into the gulf. University of South Florida marine scientist Shaojie Sun determined that between 50 and 1,700 barrels per day — up to 71,400 gallons — were pouring from the site.

Even one of the federal report’s authors — Ian MacDonald, the Florida State professor — estimated that nearly 150 barrels, about 6,300 gallons, spilled from the site that Taylor Energy once leased in an underwater canyon 12 miles off the coast of Louisiana. The other authors were NOAA scientists Andrew L. Mason and J. Christopher Taylor.

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