A thoughtful counterpoint.
The impact on the community garden would be (mostly) about light; the level of impact would depend on orientation relative to the sun and adjacent buildings.
Passing under a corridor directionally vs running under one would likely have a different risk profile but also a different impact in term of maintenance access.
That said, I accept that a short-run underneath, subject to clearance might get a pass.
Though, anyone who lived through negotiations btw Hydro and the City over parks uses...........might wonder.
Looking the current line level............I can't see going under working.
But yes, they could be moved; though that would likely mean new pylons.............that's not cheap:
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As to redeveloping East York Town Centre (the landlord of Food Basics)
I certainly agree that's overdue for redevelopment and ripe for intensification.
However, the landowner knows that too.
I expect the price would be steep for crossing the land at grade.
Would have made a world of sense of the City or Province to buy this site before announcing the Ontario Line.........It has now surely doubled if not tripled (or more) in value.