Edmonton Journal, by Dave Cooper.  Call this the year of the pipeline. As bitumen production from the oilsands continues to increase, pipeline firms have pushed forward with major projects that are now almost ready to flow.  Two major oil-export lines to the U.S. and a large diluent-import line are set to go into operation this year, while two other lines undergo significant expansions.  This year also marks the start of hearings for Northern Gateway, Enbridge's dual bitumen-export and diluent-import project between Bruderheim and Kitimat, B.C.  I... The line will bring diluent [...]