Tate and Anakyn Quina of Homa, LA, feed terns on the beach in Grand Isle. The beachhead was one of the first areas impacted by the Deepwater Horizon oil spill. Tar balls continue to wash up daily...Photographs from Grand Isle and surrounding areas impacted by the Deepwater Horizon Oil Spill. The spill is estimated to be gushing 35,000 to 60,000 barells of oil into the ocean per day. Difficulties installing monitoring devices at the source have made this number difficult to clearly ascertain. The spill is among the world's worst.