Warning signs mark a buried pipeline beneath the beach at the Grand Isle State Park. One year after the Deepwater Horizon oil spill the beach remains closed to visitors due to contamination. On 20 April 2010, an explosion on the Deepwater Horizon oil rig left 17 workers injured and 11 dead. For over three months, oil spilled from a well 5000 feet below sea level in the Gulf of Mexico, discharging over 500,000 gallons of crude oil a day (19,000 barrels). It is estimated that more than 120 million gallons of crude oil have spewed into the Gulf.