Fact: There are about two dozen oil spills a year in the U.S.

Although the state initially thought just 750 barrels of oil was involved, it turned out to be one of the largest spills in North Dakota history — an estimated 20,600 barrels over 7.3 acres of land, or about the size of seven football fields.

via ND Waits 11 Days to Tell Public About Oil Spill – ABC News.