Enbridge Energy Partners, L.P. (the Partnership) owns and operates crude oil and liquid petroleum transportation and storage assets, and natural gas gathering, treating, processing, transportation and marketing assets in the United States. As of December 31, 2011, its portfolio of assets included the approximately 6,500 miles of crude oil gathering and transportation lines and 32 million barrels of crude oil storage and terminaling capacity; natural gas gathering and transportation lines totaling approximately 11,500 miles; nine natural gas treating and 25 natural gas processing facilities with an aggregate capacity of approximately 3,255 million cubic feet per day, including plants; trucks, trailers and railcars for transporting natural gas liquids (NGLs), crude oil and carbon dioxide, and marketing assets, which provide natural gas supply, transmission, storage and sales services. The Company conducts its business through three business segments: Liquids, Natural Gas and Marketing.