The U.S. Environmental Protection Agency on Wednesday told Enbridge Inc. that the pipeline company’s massive 2010 oil spill in the Kalamazoo River system requires more cleanup work.

The Calgary, Alberta-based company owns a 30-inch pipeline running from Griffith, Ind., to Sarnia, Ontario. It burst near Marshall, Mich., in July 2010, spewing oil into a Kalamazoo River tributary.

EPA says crews have removed about 1.1 million gallons of oil and about 200,000 cubic yards of oil-contaminated sediment and debris.

The agency says it informed Enbridge that more work is need upstream from the Ceresco and Battle Creek dams and Morrow Lake. It says Enbridge has 10 days to request a conference to discuss the order.

The Associated Press has left phone and email messages seeking Enbridge’s comment.