Enbridge and MarkWest Extend Gulf of Mexico Pipeline System

Enbridge's subsidiary Enbridge Offshore Pipelines, L.L.C. and partner MarkWest Energy Partners, L.P. have acquired a 14-mile, 12-inch diameter pipeline through their jointly owned Triton Gathering, LLC (Triton) natural gas gathering system to transport production from West Cameron Blocks 62 and 75 to the Stingray Pipeline in the Gulf of Mexico.

The new Triton lateral - which will serve new natural gas development in the area owned by El Paso Production Company, Chevron U.S.A. Inc. and The Houston Exploration Company - will connect a significant new source of "deep-shelf" gas to the Stingray pipeline system and is equipped with four sub-sea taps to accommodate future developments in the area providing a capacity of 200 million cubic feet per day. The West Cameron 62 and 75 development began production in May 2006.

Triton is a non-FERC-regulated natural gas pipeline company, which owns several laterals that gather gas from various offshore third-party fields to Stingray Pipeline.

Stingray is a 325-mile, FERC-regulated, gas pipeline system, which transports gas and injected condensate from the High Island, West Cameron, East Cameron, Vermillion and Garden Banks areas in the Gulf of Mexico to onshore transmission systems located in southwest Louisiana. Stingray Pipeline Company, L.L.C. is owned by Enbridge Offshore (50 percent) and MarkWest (50 percent).

Enbridge Offshore Pipelines provides Enbridge with wholly owned or joint venture interests in 11 transmission and gathering pipelines in five major pipeline corridors in Louisiana and Mississippi offshore waters of the Gulf of Mexico. The system moves on average approximately 3 billion cubic feet per day - approximately half of all deepwater Gulf of Mexico natural gas production.