Coast Guard pollution investigators are en route to a reported oil well line rupture in the Atchalaya Basin, north of Marsh Island.
Hilcorp, a Houston company that owns the line, reported the spill at 9:30 a.m. The spill is estimated to be 100 barrels, or 4,200 gallons; the sheen is reported to be 500 yards by 300 yards.
Oil Mop, an Oil Spill Response Organization, is on scene cleaning the oil, which is contained in the surrounding marsh.