Enbridge Inc. says the spill of at least 800,000 of oil into the Kalamazoo River system near Marshall cost the pipeline company $550 million in 2010.
The Kalamazoo Gazette says the figure comes from an annual report by Enbridge. It says the figure excludes insurance recoveries, fines and penalties.
The pipeline stretches from Griffith, Ind., to Sarnia, Ontario. A portion of the pipeline ruptured last July near Marshall in southwestern Michigan, contaminating about 25 miles of Talmadge Creek and the Kalamazoo River.
Public officials say they don't know when the Kalamazoo River will reopen for public use as the cleanup continues. Oil flow through the 286-mile-long pipeline resumed in September.