Interesting articles below about Olympic Stadium however it leaves me more confused than ever about the seating capacity, is and was.
We go from 73,000 to 56,000, over the years the numbers fluctuate.
Where are the missing seats ? That empty end zone alone couldn't hold 17,000 .
When they speak of Permanent seating I assume that is the concrete shell part of stadium, the seats that are Not removable. There are some bleacher stands that can be moved around to bring fans closer to the sidelines for soccer games. They have done this for some soccer games which brought seating up to 60,000 plus.
The football seating capacity is listed as 66,308 so that must be with all the temporary seating brought in.
One thing I am sure of is how Loud Olympic Stadium is when Full or even near full. I've been to several playoff games with 50,000 plus and that place Rocks. That Concrete roof really reverberates the sound, much louder than BC Place even with the old teflon roof.
The closest comparable stadium I can think of in Loudness level was the Kingdome in Seattle which was Entirely Concrete, building and Roof. The Noise from the fans was a definite advantage for the Seahawks back then (the Steve Largent era) assuming they were playing another team not too much better than them lol.
The Kingdome held over 64,000. The decibel level reached 130 when Ken Griffey Jr hit his walkoff home run and Mariners won a playoff series.
https://sabr.org/bioproj/park/olympic-stadium-montreal/
in this below article you can move your mouse over the right column to see the different seating configurations over the years.
It was 404 feet from home plate to deep center field. Also note the original 1976 Olympics configuration with All seats installed around the track oval which I assume was a 400 meter track ? :
http://www.andrewclem.com/Baseball/OlympicStadium.html
Compare the 1976 Olympic configuration to the post 1992 baseball, football and soccer configuration with the end zone sections completely removed.
Note how the footprint of the stadium is dictated by the track oval and the oblong CFL field at 160 yards x 65 yards by 1976 rules. A typical NFL football specific stadium today Without the track oval would cover a much smaller footprint.
Case in point, look at the L.A. Memorial Coliseum, with the track oval dictating the shape of the stadium, the seats are set farther back from the sidelines especially in the end zones which are Really far back.