The Mainline pipeline system Critical energy infrastructure ensures safe and reliable energy supply for North American consumers

With more than 13,800 This sophisticated pipeline and delivers crude to markets kilometers (nearly 8,600 infrastructure network carries in Minnesota, northern Illinois, miles) of active pipe, a variety of crude oil types, Indiana, Ohio, Michigan and including production from the southern Ontario. Other Enbridge Enbridge’s Mainline pipeline Canadian oil sands and natural market access pipelines serve network has the capacity to gas liquids, to refineries across markets in the U.S. Gulf Coast, transport 2.85 million barrels North America. The Mainline is Oklahoma, southern Illinois, a day of light and heavy Canada’s largest crude oil and Quebec. crude oil from Edmonton, transportation system and plays a critical role in providing safe and The first pipeline in the Mainline Alberta to the U.S. Midwest reliable energy supply for North network, Line 1, connected and Ontario. American consumers. Edmonton to Superior and was built in 1950, in the wake Enbridge’s Mainline network of the Leduc, Alberta oil discovery includes the Canadian Mainline that signaled the birth of the system, which includes several modern Canadian industry. pipelines running from Edmonton Since then, numerous additional to the Canada-U.S. border at lines have been built to meet Gretna, Manitoba, and the consumer demand and rigorously Lakehead System or U.S. maintained to ensure the Mainline, which carries on to continued safe operational Clearbrook, MN and Superior, WI, reliability of the system.

enbridge.com/about-us Market access and At the same time, there continues to be strong demand from Enbridge’s Mainline optimization customers to optimize throughput on the Mainline system. In all the years of change and growth, one certainty has remained: Given the multi-pipeline configuration delivering safe and reliable solutions of the Mainline system, several low for our customers is the foundation of cost optimization and expansion Enbridge’s business. opportunities are available. These enhancements could potentially Between 2013 and 2017, Enbridge provide incremental capacity successfully placed into service more of more than 350,000 bpd out of than 1.1 million barrels per day (bpd) Western Canada and the Bakken bpd of new pipeline capacity upstream region to North American refiners. of Superior and more than 1.65 million bpd downstream of Superior.

These market access projects have enabled production growth from the Western Canada Sedimentary Basin and Bakken regions to move to prime markets and have provided the flexibility to optimize operations of the Mainline system to become even more safe and reliable.

enbridge.com/about-us