The Enbridge spill into Michigan's Kalamazoo River has been contained, but it's left a nasty sheen on the company's reputation and its sprawling network of aging pipelines in North America.

This week's spill of about 20,000 barrels of oil came after a "warning letter" from a United States government official in January that said Enbridge wasn't doing enough to mitigate corrosion on the pipeline that burst Monday, and had likely violated federal regulations.

Read the entire Globe and Mail article here.