Excavation and Cavern work at Queen-Spadina station

 A recent Metrolinx announcement caught my attention with this short entry:

Station excavation and cavern work at Queen-Spadina
From December 2024 until early 2026. 
24-hour shifts from Monday to Saturday.
Occasional additional shifts may be required.

So I opened the link provided to appreciate what is actually happening beneath the surface:
Metrolinx Newsletter 2024-12-20