Dispersed , weathered oil reaches Lake Pontchartrain . well that has been spewing into the Gulf since April , the Joint Information Center in Houma said Monday night . Tar balls described as `` about the size of a silver dollar '' Part of Pontchartrain closed to fishing . The lake is now safe for swimming and boating but still has an oily sheen on it from years of dumping by ships in the Gulf of Mexico.
Dispersed , weathered oil reaches Lake Pontchartrain . Tar balls described as `` about the size of a silver dollar '' Part of Pontchartrain closed to fishing . The lake is now safe for swimming and boating but still has an oily sheen on it from years of dumping by ships in the Gulf of Mexico.