OHW-1-89 - Interhome Energy Inc. which carries on its pipeline operations as "Interprovincial Pipe Line Company, a division of Interhome Energy Inc."

OHW-1-93 - Trans Mountain Pipe Line Company Ltd.

OHW-1-99 - Pipestone Pipelines Ltd.

OHW-2-95 - Interprovincial Pipe Line Inc. ; Westspur Pipe Line Company Inc.