MEREDOSIA OIL TERMINAL—THE ILLINOIS RIVER FLOODS A TANK FARM
ABSTRACT Rising waters on the Illinois River during April 1979 caused breaks in the levee near Meredosia, Illinois. The swollen river flooded 10,000 acres of farmland, as well as the asphalt storage tank farm of the Meredosia Oil Terminal. The 35 tanks within the terminal included several multimillion gallon tanks of hot asphalt, as well as those containing the diesel fuel for the heating system. The floodwater reached a depth of 12 feet and the hydrostatic pressure of the rising waters lifted the diesel fuel tanks and toppled them. Thousands of gallons of oil spilled from the vents at the top of the tanks, or from the broken pipelines at their bases. A westerly wind moved the oil out over the flooded farmland. The terminal operator's resources were depleted after long efforts to prevent the levee breaks. The spill-ctonainment dike around the tank farm was underwater, so several thousand feet of floating containment boom was brought in to surround the tank farm. A Marco Class self-propelled skimmer was flown in by the U.S. Coast Guard Strike Force. However, inspections on the second day revealed that much of the oil had diffused out over the floodwater and did not appear to be recoverable. Response forces concentrated on the spilled oil within the tank farm and the potential of teh toppled and floating tanks. After 3 days of cleanup, a brief, violent storm blew oily debris back to the terminal from across the lake. Now a massive debris recovery effort was begun in addition to the oil recovery. Cleanup efforts continued for 51 days, until by June 4, 1979, the floodwaters had dropped below the tank farm's spill-containment dike.