1949
Trans-Northern Pipelines is incorporated.
1950s
Construction begins on the Ontario-Quebec pipeline, including the Ottawa lateral pipeline; transportation of refined petroleum products begins. Additional pumping stations are added to increase the pipeline’s capacity.
1960s
A new branch line extends the Ontario-Quebec pipeline to Montreal’s Pierre Elliot Trudeau International Airport.
1970s
Construction begins on the Alberta Products Pipe Line, connecting refineries in the Edmonton area with facilities in Calgary. The Ontario-Quebec pipeline is extended with branches to Pearson Internal Airport and Montreal’s Mirabel Airport, and to refineries in Nanticoke, Ontario, bringing the pipeline to its current length of 850 kilometres.
1980s
Flow of products along the Ontario-Quebec pipeline is reversed in the eastern part of the pipeline to enable movement from Toronto-area refineries eastward to Montreal.
2000s
TNPI celebrates 50 years of operations, and an additional section of the Ontario-Quebec pipeline is reversed, linking refineries in Montreal westward to Toronto distribution terminals.
2020s
The new, 12” Alberta Products Pipe Line is commissioned, and APPL celebrates its 50th anniversary while TNPI marks 70 years of operations.