Newly disclosed Coast Guard documents warned that 336,000 gallons per day of oil could spew into the Gulf of Mexico if an underwater well had a complete blowout. Coast Guard logs show the prediction came a day after a rig exploded on April 20, triggering the worst oil spill in the nation's history from that well.
The well didn't have such a failure. But the volume turned out to be much closer to that figure than the 42,000 gallons per day that BP first estimated. Weeks later that was revised to 210,000 gallons.