The barge again ran aground, four miles (6 km) further upriver and ruptured another tank on a shoal near Mason Point, while trying to set anchor, per the U.S. Coast Guard's orders.
Shoreline, wildlife, rocks, and boats were covered with oil, as far downriver as Massena, New York and Brockville, Ontario.
It was difficult for clean-up officials to fully document the damage to the St. Lawrence River ecosystem.
A count of animal mortality included 226 waterfowl and ducks and 508 birds, mammals and amphibians.
Several hundred waterfowl, ducks, other birds, and countless fish were harmed or killed by the spill.