First of all, the economics have probably changed, certainly within the last decade. But I think it's also important to note the context, that this isn't the first time the economics have changed.
That pipeline was originally built in the 1970s for the specific purpose of taking western oil to eastern Canada at the time of the original OPEC oil embargo and disruption in the Middle East. Economics changed, and by the 1990s that pipeline was reversed to be able to take imported crude as far as Sarnia.
Economics have changed again, and now there is an opportunity to move up to 300,000 barrels of oil per day. That's what Enbridge has requested from the NEB. That amount is enough to supply more than the total needs of the Suncor refinery in Montreal and half of the needs of the Valero refinery in Montreal.
You could potentially reduce what is about 600,000 to 700,000 barrels of oil imported into eastern Canada today by about 300,000 barrels.