Columbia Gas Transmission, a unit of NiSource ( NI - Get Report), plans to expand its pipeline, compression and storage networks.

The project will expand Columbia's ability to serve growing eastern and mid-Atlantic markets. The project's proposed in-service date is April 1, 2009. Four local gas utilities have executed 15-year agreements for the combined new storage and transportation services.

Columbia Transmission operates 12,750 miles of interstate natural gas transmission pipeline in the mid-Atlantic, Northeast and southern states, including 36 natural gas storage fields.

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