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There you go. Problem solved. Already been done. Article: http://www.designbuild-network.com/projects/wembley/

From the Wembley stadium article:

Just did a google search and found this: https://www.youtube.com/watch?v=GaP2YjTwtm0

Lille stadium takes half the pitch and floats it over the other half of the pitch to set up for concerts.
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You are missing my point.

No pressure should be applied on the grass. We agree on this. Nothing should actually touch the grass.

Now... "get er done".

POAK17: That's what I'm suggesting....

You could put it over the grass without it being on top of the grass.

Use your imagination.

That's what I'm suggesting.

If they are serious about making this work, then the best solution is putting a turf surface over the grass (NOT ON THE GRASS) for 5 hours for the CFL game and then...

They put a wood floor basketball court over top of an ice rink for two different sports at the ACC.

It's not an astronomical engineering feat to do the same for natural grass for soccer and turf...

When you hire someone to build you a porch for the front of your house you are partially responsible for who you hire to do the job no?

Not everyone is equally qualified to do it, and that is...

Mowe, the schedule when we played CCL was already WAY overcrowded. Throw in the Argos and there is no hope at all... the field will be a sloppy mess from June/July to August and probably won't...