Danforth Line 2 Scarborough Subway Extension

[Markster]

6m should be fine, unless they decide to build a sports arena right there.
It's only going to be a steady stream of mall and condo-bound traffic. Nothing really peak-y.

But it certainly sucks that everyone will have to cross McCowan at street level until something is built across the street. And looking at the plans for that development, (https://toronto.skyrisecities.com/f...168-8m-53s-oxford-properties-sweeny-co.34889/) I guess STC is never going to have an indoor connection to the subway ever? What a downgrade. You'd think Oxford would design the new building to support a future connection to the mall.

 

[sixrings]

6m should be fine, unless they decide to build a sports arena right there.
It's only going to be a steady stream of mall and condo-bound traffic. Nothing really peak-y.

But it certainly sucks that everyone will have to cross McCowan at street level until something is built across the street. And looking at the plans for that development, (https://toronto.skyrisecities.com/f...168-8m-53s-oxford-properties-sweeny-co.34889/) I guess STC is never going to have an indoor connection to the subway ever? What a downgrade. You'd think Oxford would design the new building to support a future connection to the mall.

Open air baseball stadium in Scarborough. Think of the atmosphere and world class views.

 

[nfitz]

6m should be fine, unless they decide to build a sports arena right there.
It's only going to be a steady stream of mall and condo-bound traffic. Nothing really peak-y.

I was always surprised at how much pedestrian traffic there was between Scarborough Centre station and Scarborough Town Centre, whenever one of those relatively small trains arrived. Though I never measured the passage width.

 

[11th]

Yes - that's right on the east side of McCowan, pointing west. And seems a bit narrow in my mind. Though 6 metres doesn't sound narrow; but the ones that are part of the station seem to be 10 metres.

Good to see the triple escalators in the design.

From aerial maps, the bridge looks to be somewhere between two to three vehicular lanes width.

 

[Markster]

Walking past Sheppard/McCowan today, I saw them loading up dump trucks again.
The TBM is back on the move.

 

[Leo_Chan]

I was always surprised at how much pedestrian traffic there was between Scarborough Centre station and Scarborough Town Centre, whenever one of those relatively small trains arrived. Though I never measured the passage width.

There's no pedestrian access to Triton Rd directly from the station, so people might go through Scarborough Town Centre to access destinations North of the station.

 

[NIV]

With the Sheppard subway extension possibly/probably looping down and meeting up with this new STC stop my guess is this will provide a direct link to the mall. They are temporarily closing McCowan rd at the end of August for 5 days for around the clock work to remove the Progress bridge but not the RT bridge. This makes me think that some of this infrastructure may come into play for the sheppard subway line. Alternatively the Brimley stop on the Sheppard line could extend into the mall, not as appealing but possible

 

[JBR]

So looks like rumors were true that TBM was broken down near 401.

Strabag has 4 lanes of 401 closed today as if the machine is digging underneath

 

[BB ON]

So looks like rumors were true that TBM was broken down near 401.

Strabag has 4 lanes of 401 closed today as if the machine is digging underneath

MTO says "Engineering Investigation" but not clear what is going on exactly. The highway cams don't show much.

 

[BB ON]

Here's a picture of the 'engineering investigation' -- some drilling involved

The closure has also been extended to the 6th.

 

[NIV]

Here's a picture of the 'engineering investigation' -- some drilling involved

View attachment 577098

The closure has also been extended to the 6th.

Wondering if the TBM made it to the south side of the 401 before this happened?

 

[generalcanada]

https://youtu be/mECsgrsfelQ?t=1289

UT is removing timestamps. add the dot where the space is

"this is a much more complex dig than crosstown west, we are tunneling towards the 401, we are keeping an eye on the tunneling process"

Hmm, maybe they discovered something ahead of the tbm?

 

[reinventingthewheel]

Referencing a Toronto soil map, I noticed that the investigation is being performed near the border of two distinct soil deposits.

The hashed area denotes "Peel ponds; shallow-water deposits: sand" while the green area denotes "Young tills: clayey silt till and sandy silt till."

I know little about the topic of soil engineering but there's a non-zero chance this plays a role in whatever complication is being investigated.

 

[Coolibop]

Here are a couple of quotes (pretty much the entire update on the project) from Phil:

This is much more complex dig than the Eglinton west extension

An unexpected problem.

We're tunneling towards the 401 and we're keeping a close eye on that tunneling process

They were supposed do be under the 401 in early March.
From my Feburary post (paraphrasing from a previous board meeting) we had the TBM somewhere just north of the 401:

It is at ~900 metres with a pause for a couple weeks to get ready to go under the 401 (apparently they cannot stop once going).

I'll say it again:

You stop communicating to your stakeholders, you loose faith and confidence from others. Metrolinx is certainly living up to that standard as of late.

Not giving any sort of detail is bizarre given the obvious facts above.

 

[Coolibop]

Referencing a Toronto soil map, I noticed that the investigation is being performed near the border of two distinct soil deposits.

The hashed area denotes "Peel ponds; shallow-water deposits: sand" while the green area denotes "Young tills: clayey silt till and sandy silt till."
View attachment 577187

I know little about the topic of soil engineering but there's a non-zero chance this plays a role in whatever complication is being investigated.

Good find.

Instability (sand) + water ingress (from the deposits). Probably why they cannot stop the TBM in this area (to prevent tunnel face from collapsing?). If the TBM stops, it could lead to instability and make it hard to start back up (or maybe this already happened?).

Why they cannot say if this is the reason...who knows...