I know this has been noted before many times and was part of the modelling for demand - there are many points along this line where you can see a lot of transfer volume. Starting in the current Weston to Kennedy you have the following either existing of future connections: - GO at Weston - GO at...

Georgian Bay shale all the way down

Every time I drive by I wonder if it will open before the Crosstown or if an LRT will roll by ....

... and with a thick transfer slab right over top of the opening to support the columns above.

It's not unsupported rock with loose boulders - this is a treated cut rock face reviewed by geotechnical engineers and the safety team. There are no boulders. The whole site is cut into rock and precautions are taken prior to allowing workers into the space. Maybe the photo makes it look...

Yeah - Toronto and GTA is pretty much all this fractured shale (which is prone to swelling) - further north you go, will see more limestone (i think it's mainly limestone) and harder rock and they are much closer to the surface (or above) - good old Canadian shield territory

Great shots from above - I only seem to get good shots from the bottom looking up .

None - once they dig far enough down to expose them, they just smash into them and toss 'em

and yes - the 407/tolls are blue as well

Blue signs are for the collectors - green for express or highways without collector/express setup.

Once the roof of the station box is complete (which will still be below these utilities, they start backfilling to the point where the sewers are sitting on new grade. They will either back fill around and move on, or - hopefully - replace the old infrastructure with new and then continue...

Yeah it's a massive site, so you don't really get any trapped air down there. For some of the thinner condo towers I could see that happening.

Building of the core in this fashion should also be a clear tell that its a structural steel frame - otherwise the entire slab would be formed at once including the remaining columns. The building has the centre core and then perimeter columns as the only vertical support system. All floors will...

Not that I can ever notice - problem is you are in full construction gear and I tend to sweat a lot under my hard hat. Why would you mention that it would be cooler down there?

The construction team isn't lol

Hopefully you don't spend too much time down in the lower levels ... lot of progress of late including work progressing west.

As a side note, the cisterns will be constructed after some portions of the parking levels are completed - there will be an opening left in this area to allow this

As noted previously, this is the hold out property which was not purchased. The whole development works around it.

A lot of core and foundation work getting done now - once we are out of the P4 this phase of the building will climb quickly.

Most concrete these days can be comprised of up to 25% sand and 50% aggregate - while the sand is "engineered" in the sense of particle size and quality, "dirt" does make good concrete.