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 from the Midwest to Enbridge's Edmonton terminal, where it will be added to the rapidly expanding diluent marketplace.  "Diluent is clearly part of the heavy-oil picture, so a new source should help with the economics of oilsands production," said Steve Wuori (NGP Photo), Enbridge's executive vice-president for liquids pipelines. "In some areas of the U.S., condensate is a waste product with not much value. They have no heavy oil to mix it with, and there is no way you can flare this stuff anymore," Wuori said. ... Keyera opened its Alberta Diluent Terminal (ADT) in 2009 after buying the storage and rail loading facilities at the former Celanese site on the eastern border of Edmonton.  Condensate unloaded at the ADT is piped to the Keyera Edmonton Terminal on Refinery Row, and then on to the Fort Saskatchewan fractionation and storage complex. ... could see the project attract as much public interest and media attention as the stalled Mackenzie Valley project.  The clock begins to run once Enbridge submits its formal request sometime in the next few weeks. Within two months, the review panel will have defined the questions to be addressed and set a timetable for public hearings along the whole Bruderheim-to-Kitimat route.