As to the no "real" "net" impact - that remains to be determined.
If there was any real impact at all from the noise front, Porter would have to file for an amended approach procedure or an amendment to the Noise Exposure Forecast. They haven't. So no impact there.
I will buy the argument that there will be additional traffic. But even that's a stretch. Porter could order 30 Q400s instead of 30 CS100s and they'd be flying 70 pax per airplane instead of 107. That sounds like a big difference until Porter start operating the CS100s on long flights so they only 1-2 runs per day. In the end, if the tunnel and associated infrastructure is being built out to support the increase use of the airport, I fail to see what the huge impact is, from these aircraft.
Economic activity in Toronto yes, economic activity in Montreal? Not really if your argument is about the economic health of Toronto and the benefits it offer for the city. Confounding the two is what I am getting at.
I have not confounded the two. I am quite clear. Porter expanding is good for our economic health (my primary consideration). That they are creating/sustaining lots of jobs in Montreal is definitely great. What I'd like is the hypocrisy to stop where people will argue some government decision (like buying subway cars) must be supported because it creates jobs while suggesting another government decision (like allowing "jets" at YTZ) should not include any consideration of the jobs created elsewhere.
What about the beyond that? Isn't that exactly what we've been through over the years? The slow creep of the vision of the airport?
AoD
Beyond that, you have that debate then. Why is it that anything must be set in perpetuity for the rest of our lifetimes? And why do we have to stop all progress now just because we are worried of some debate in the future where it's entirely within our power to control the issue? They City could easily insist that the tripartite agreement come with a hard cap on landing slots and that the City get a say in any future expansion of slots. It doesn't have that power today. Or we could put on radius limits. This is the case for both LaGuardia and Washington Reagan, for example, to bias use of the airport towards regional transportation.
Overall, what I find disappointing with this issue is the fixation on "jets". Like I said earlier, it's perfectly legal for somebody to land a fully loaded C-130 with more noise than you'll ever hear from any CS100, at YTZ. This is bizarre. If we care about noise, then let's regulate noise. If we care about expansion or whether the Island is an appropriate place for an airport, let's have that discussion. But trying to stifle growth through some silly clause that does not take into account at all for changes in technology doesn't benefit anybody. For once, I would like an intelligent policy debate, not city councillors yelling, "Props good. Jets bad." This "no jets" rule is akin to banning computers today because you had an issue with typewriters, 30 years ago.