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The North Baja Pipeline is an overall 220-mile (350 km), bidirectional natural gas pipeline that can deliver gas from Arizona, through California, and into Mexico or from Mexico into the United States.

The 80-mile (130 km) U.S. portion of the system is owned by TC PipeLines LP, and the 140-mile (230 km) Mexican portion is owned by Sempra Energy International. Its FERC code is 181.^[1]

North Baja Pipeline was originally conceived as an east-to-west pipeline to provide electric power plants in Mexico with natural gas. An expansion added facilities to allow gas to flow from west to east, providing for importation of natural gas into the United States. The source of that natural gas is a liquefied natural gas terminal on the Pacific Coast of Mexico called Costa Azul (Energia Costa Azul), owned by a subsidiary of Sempra. The pipeline is capable of transporting up to 600 million cubic feet a day of natural gas in either direction.

• List of North American natural gas pipelines

• Pipeline Electronic Bulletin Board