Toronto Ontario Line 3 | ?m | ?s

[officedweller]

Today, from the opposite side of the ravine:
View attachment 601250

Curious what the new tower will do?
It seems to bring wires closer to the viaduct alignment.
Could be one of many towers for an entirely new parallel set of towers unrelated to the Ontario Line?

 

[smallspy]

They were not windows. Just openings. And IIRC the panels were installed partly for noise, but mostly to keep the elements out and reduce maintenance.

That's not quite what they were for or how it all went.

Once it was realised that the subway was not going to use the bridge carrying Bloor over the Rosedale Ravine, a number of designs were floated about for a new bridge carrying the subway tracks across the valley, all of them completely open.

The residents of Rosedale were not enthused, and requested that the TTC enclose the tunnel, so that their homes were not disturbed by the noise of passing trains. And, because it was Rosedale, the TTC relented and built a mostly-enclosed tunnel with just the openings in the roof for ventilation.

Fast forward 50 years, and the TTC is busy upgrading the ventilation system throughout the subway. It was very quickly realised that those openings were a very serious liability to any upgraded ventilation system, as they would allow oxygen to continue to flood into the tunnels in the event of a fire. So it was decided to seal the openings, and from a ventilation standpoint the bridge is now just another section of tunnel.

Dan

 

[Allandale25]

I can't picture where this creek is. Happy to see a location if anyone knows where it is.

Tweet from OL:

Introducing the largest tunnel on the Ontario Line (so far)! It's 15 metres deep, 94 metres long and 1.5 metres in diameter. This tiny tunnel was dug using a microTBM to create a sewer overflow culvert - or drainage pipe - under the CP rail corridor near Wamsley Brook.