Last week, Sen. Franken called on The Pipeline and Hazardous Materials Safety Administration (PHMSA) to conduct a full investigation into the recent Michigan oil spill. In a letter to Cynthia Quarterman Sen. Franken asked PHMSA to "identify the cause of the rupture, investigate Enbridge's safety record, and take strong steps to prevent similar catastrophes from happening in the future."

"This is a tragedy for the people and wildlife of Battle Creek, and we must ensure Enbridge pays for all associated damages," said Sen. Franken. "Enbridge has an unacceptable safety record for its pipelines, and Minnesota has been directly impacted by it in the past. I am writing to the Pipeline and Hazardous Material Safety Administration to ask them to examine the causes of the leak and ensure it doesn't happen again in Minnesota or anywhere else."

There are six Enbridge pipes that run through northern Minnesota, pumping 1.87 million barrels of oil per day.