In the July 2010 Kalamazoo River oil spill , a leaking pipeline spilled more than of oil sands crude oil into Talmadge Creek leading to the Kalamazoo River in southwest Michigan on July 26 , near Marshall , Michigan . A United States Environmental Protection Agency update of the Kalamazoo River spill concluded the pipeline rupture " caused the largest inland oil spill in Midwest history " and reported the cost of the cleanup at $ 36.7 million ( US ) as of November 14 , 2011 . The cleanup is unfinished as of March 2013 . PHMSA raised concerns in a Corrective Action Order ( CAO ) about numerous anomalies that had been detected on this pipeline by internal line inspection tools , yet Enbridge had failed to check a number of those anomalies in the field . The Michigan spill affected more than of waterways and wetlands and about 320 people reported symptoms from crude oil exposure . The National Transportation Safety Board said at $ 800 million , it was the costliest onshore spill cleanup in U.S. history . The NTSB found Enbridge knew of a defect in the pipeline five years before it burst . In June 2013 , a Kalamazoo man lodged himself into an Enbridge pipeline in Marshall , MI to protest Enbridge 's lack of accountability for the 2010 spill and to encourage landowners along Enbridge 's Line 6B expansion to offer increased resistance to construction in 2013
Kalamazoo River oil spill
Kalamazoo River oil spill
Enbridge