The Quebec Bridge first collapsed in August 1907 & the damage was quite extensive.
Although the damage from the 2nd collapse wasn't as severe, the timing was on a very peculiar day in 1916. It was the other way around with the WTC, because the 1993 damage to the complex still allowed it to stand until the stairway to hell in 2oo1.
The WFC & the WTC were connected by a couple of covered footbridges. The north footbridge was built beside 3WFC & in September 2001, it had a curious web site sign on it. http://www.quebecnewyork.com/
Now considering that the main train bridge & airport for Quebec City share a 9/11 connection, that's some mighty peculiar synchronicity. Jump to the 14 minute point of this video to see the QNY web site advertisement. Until 9/11, 2001 New_York_City & Quebec_City didn't seem to share a 9/11 coincidence between them.
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Perhaps no other airport can claim 9/11 as the date of their first flight.
http://syncnotes.blogspot.com/2010/06/quebec-city-international-airport.html