spill, Colonial found anomalies on the pipeline, including on the area where the rupture later occurred, but did nothing. At the time of the spill, Colonial received information of a sudden drop in pipeline pressure. Despite receiving this information indicating a leak, Colonial continued to send fuel oil through the line. Colonial briefly shut down the pipeline, but reopened it and sent fuel oil again, despite continued indications of a leak, until they were alerted by the Knoxville Fire Department that Colonial's fuel was running into Goose Creek. On Wednesday, October 3, 2012, Colonial Pipeline shut down line 19 and 20 in Chattanooga, Tennessee due to reports of gasoline odors. Reuters reported that about 500 gallons of gasoline may have been released. The line carrying gasoline was repaired and the distillate line, which carries Diesel fuel, jet fuel and other products, was inspected and found to be undamaged. Both lines were restarted two days later on October 5, 2012. September 21, 2015, a leak was discovered in Centreville, Virginia by a local restaurant employee. The leak was estimated to have released 4,000 gallons of hydrocarbon product over the course of the preceding 2 weeks. Product was located and removed from the downstream retention pond adjacent to a townhome community. On Friday, September 9, 2016, a leak was detected in Shelby County, Alabama, spilling an estimated 252,000 US gallons (954,000 L) of summer-grade gasoline, requiring a partial shutdown of the pipeline and threatening fuel shortages in the southeastern United States. This was Colonial's "biggest spill in nearly two decades". It caused a "12-day interruption in the flow of about 1.3 million barrels per day of the fuel from the refining hub on the Gulf Coast to the Northeast." On October 31, 2016, a Colonial Pipeline mainline exploded and burned in Shelby County, Alabama, after accidentally being hit by a trackhoe during repairs related to the September event. One worker died at the scene, and five others were hospitalized, one of whom later died of his injuries. The explosion occurred several miles from the September 9, 2016 breach. On November 1, 2016, the U.S. Occupational Safety and Health Administration had control of the site, where the fire was still burning. The shutdown was affecting primarily the Southeast, as Northeast markets can receive some oil by water. The line returned to service November 6. In the summer of 2020, a Colonial Pipeline gasoline