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Sarah Harmer Chat on Line 9 29:39

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The National Energy Board begins hearings this week on oil giant Enbridge's proposal to reverse the flow of Pipeline 9, running from Sarnia, Ont., to Montreal and through rural Hamilton.

Join CBC Hamilton and musician and environmental activist Sarah Harmer on Tuesday at noon for a live chat on the issues.

Harmer is sitting in on the hearings in Montreal on Tuesday, and will have her say at them in Toronto next week.

Enbridge already has approval from the National Energy Board to reverse the oil flow of the first stretch of Pipeline 9 that runs from Sarnia to the Westover Pump Station in rural Hamilton.

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Line 9's route through Ontario and Quebec. The Portland Montreal Pipeline's route through Quebec and the United States. (Duk Lee/CBC)

The flow reversal of Line 9B, which runs from Westover to Montreal, has yet to be approved.

Enbridge said it wants to reverse the flow of the oil running through Line 9 to source more domestic oil from Western Canada and send it East. Right now, the pipeline runs in an East to West direction, sourcing foreign oil.

Harmer has spoken out about her concerns with the safety of the flow reversal. The pipeline runs through the Harmer family farm on Mount Nemo. It also runs through a wetland near Harmer's home north of Kingston, Ont.

You'll be able to listen to the conversation with Harmer live online and ask her questions in our live chat. You can send your questions in early, too, via email or Twitter. If you have a question ahead of the noon chat, email hamilton@cbc.ca or tweet @CBCHamilton.

5 facts about Enbridge's Line 9 Pipeline:

  1. Pipeline 9 is 38 years old. This is the second time Enbridge would reverse its flow. Pipeline 9 originally flowed West to East.
  2. Line 9 runs through several environmentally significant areas like the Beverly Swamp and Spencer Creek, Hamilton's largest watershed.
  3. The National Energy Board approved the reversal for the first leg of Line 9 (from Sarnia to Westover) in July 2012.
  4. Enbridge plans to run light crude oil through Line 9, but said a thicker diluted bitumen (dilbit) might run through the pipeline as well. Oil expert and University of Waterloo Prof. Maurice Dusseault told CBC Hamilton that in the case of a spill, dilbit "won't seep down as fast."
  5. Enbridge had a significant oil spill in Kalamazoo, Mich., in July 2010 into the Kalamazoo River. According to a report from the U.S. National Transportation Safety Board, which reviewed the spill, Enbridge pipeline controllers in Edmonton ignored repeated leak warnings for 17 hours before shutting down a pipeline that poured 20,000 barrels of oil into the river.