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MID-CONTINENT SYSTEM

Cushing storage tanks

The Partnership’s Mid-Continent System has a storage capacity of 16.7 million barrels, which includes our Cushing storage tanks pictured above. In total, this system is comprised of 480 miles of pipeline and 106 storage tanks, ranging in size from 55,000 to 575,000 barrels.

The Ozark Pipeline, transporting crude oil from Cushing to Wood River, Ill.; the West Tulsa Pipeline, delivering crude from Cushing to refineries in the Tulsa, Okla., area; and storage terminals at El Dorado, Kan., and Cushing together comprise the Partnership’s Mid-Continent System. The 480 miles of pipeline within the Mid-Continent System recorded average deliveries in 2008 of 231,000 bpd. The Partnership’s Mid-Continent terminal facilities also are interconnected to Enbridge’s Spearhead Pipeline, which transports crude oil from an interconnection with the Partnership’s Lakehead System near Chicago to our Cushing storage facility. The Partnership’s Cushing Terminal, which was expanded in 2007 with a net addition of seven tanks (3.8 million barrels), provided an $8.7 million increase in contract and spot storage revenues in 2008. Mid-Continent storage at Cushing and El Dorado, is comprised of 106 tanks ranging in size from 55,000 to 575,000 barrels with a total combined capacity of 16.7 million barrels.

NORTH DAKOTA SYSTEM

The Partnership’s North Dakota System provides a vital transportation route for producers in eastern Montana, North Dakota and southern Saskatchewan seeking to transport growing, market-constrained supplies of crude oil sourced from the Bakken Play to refineries in the U.S. Midwest and beyond through deliveries into our Lakehead System and into a third-party pipeline at Clearbrook, Minn. The North Dakota System comprises approximately 330 miles of crude oil gathering lines and a 620-mile transmission pipeline. Construction of the Phase VI expansion of the North Dakota System began in 2008. This expansion – which includes upgrades to pumping stations, additional tankage and extensive use of drag reducing agents – is anticipated to be complete in early 2010 and will increase system capacity from 110,000 bpd to 161,000 bpd.

Looking Forward

In 2008, Enbridge and BP announced that the two companies are proposing a joint venture to increase delivery of crude oil sourced from the expanded Lakehead System into the Cushing Hub and onward into the U.S. Gulf Coast market. The project, if approved, would involve the reversal of the BP No. 1 crude oil pipeline between Cushing and the Chicago area – interconnecting with the Lakehead System at Flanagan – and some new pipeline construction between Cushing and Houston and possibly the Nederland, Texas, area. In early 2009, the two companies continued discussions with potential shippers about the project and its advantages for economic transportation of Canadian crude oil into the Mid-Continent and Gulf Coast refinery markets.