Unless you have inside information that everyone else does not, TCPL were deliberately vague about their reasons for cancelling Energy East. This was all that was said in the press release:
"After careful review of changed circumstances, we will be informing the National Energy Board that we will no longer be proceeding with our Energy East and Eastern Mainline applications."
There is no mention that it was no longer economically viable. I'm not saying that it was viable but there is no statement of fact that it was not. Changed circumstances could also mean:
'we have just gone through years of delay and significant cost with Keystone XL, and we still don't have shovels in the ground. We decided that we don't want to repeat that all over again with Energy East.
'with the Liberal government, there is no national pipeline agenda or at the very least, the political will to see pipelines built across provinces to tidewater. Without the political will, TCPL can't accomplish this on our own'
'Lately, environmentalist groups, both foreign and domestic, have a disproportionate share of voice in this country. For an infrastructure that has a proven history of performance, safety and minimal disruption to the environment, there is not sufficient voice for the real economic benefits and prosperity that pipeline expansion would be bring to this country; or the economic losses incurred by continually having our resources landlocked.
If I was the president of TCPL, this is what I would really be thinking when I said 'review of changed circumstances'.