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Bison Pipeline, LLC (Bison)

Bison Pipeline, LLC, entered commercial service on January 14, 2011. Bison is an interstate natural gas pipeline designed to transport gas from the Powder River Basin to the Midwest market. The pipeline provides producers in the Power River Basin with additional natural gas pipeline capacity to access and meet increasing natural gas demand of the Midwest. Bison is operated by TransCanada Corporation (TransCanada).

Bison consists of approximately 302 miles of 30-inch-diameter natural gas pipeline and related pipeline system facilities that extend northeastward from the Dead Horse Region near Gillette, Wyoming, through southeastern Montana and southwestern North Dakota where it interconnects with Northern Border Pipeline Company’s (Northern Border) system near Northern Border’s Compressor Station No. 6 in Morton County, North Dakota.

Bison currently has 407 million cubic feet per day (MMcf/d) of operational capacity. Its design capacity with compression (approved but not yet constructed) is approximately 477 MMcf/d with potential expandability to approximately 1 billion cubic feet per day.

TC PipeLines Intermediate Limited Partnership owns 100% interest in Bison.

TransCanada is a leader in the responsible development and reliable operation of North American energy infrastructure including natural gas pipelines, power generation and gas storage facilities. TransCanada’s network of 35,500 miles of wholly owned and 7,000 miles of partially owned pipelines connects virtually all major supply basins with major markets across North America.