GO Transit: Construction Projects (Metrolinx, various)

[nfitz]

First of all, what is the 100 year flood plan look like for this creek?? This will determined what is needed to deal with that flood water.

I went through the HEC modelling last year. Currently (if they were to fix the outflow from the existing culvert) on the upstream side, the water ponds up to about 1/3 of the height of the embankment - much higher than the culvert. While this exceeds a railway design standard, it's not really an issue because of high high the embankment is.

With the new culvert, it's design so the 100-year storm causes minimal, if any (I'd have to check) water above the top of the culvert. But also so the peak flow rate downstream of the culvert doesn't change (but changes the timing and length of the peak - it's going to be earlier now. Essentially they are removing an inadvertently created on-line storage pond.

I feel ML thinks this tunnel will deal with the 100 year flood issues as well the cheapest way to deal with it as well allowing a 4th track to be added at a future date.

The old design met the storm just fine. Given just how much of the existing area upstream wasn't flooding, and is all parkland, even greatly exceeding the 100-year storm wouldn't do anything but flood the ravine.

Assuming the embankment is solid.

 

[Metroscapes]

I went through the HEC modelling last year. Currently (if they were to fix the outflow from the existing culvert) on the upstream side, the water ponds up to about 1/3 of the height of the embankment - much higher than the culvert. While this exceeds a railway design standard, it's not really an issue because of high high the embankment is.

With the new culvert, it's design so the 100-year storm causes minimal, if any (I'd have to check) water above the top of the culvert. But also so the peak flow rate downstream of the culvert doesn't change (but changes the timing and length of the peak - it's going to be earlier now. Essentially they are removing an inadvertently created on-line storage pond.

The old design met the storm just fine. Given just how much of the existing area upstream wasn't flooding, and is all parkland, even greatly exceeding the 100-year storm wouldn't do anything but flood the ravine.

Assuming the embankment is solid.

A user with HEC modelling experience

 

[Krypto98]

Sounds as if Metrolinx is preparing for a fourth serviceable track at Bramalea? The south platform is already connected to the south parking lot by way of a surface crossing over a disused industrial spur. Reactivating and upgrading that spur track for passenger service and extending it along the platform towards the Weston Sub would require a grade separated connection to the south parking lot.

So it it’s interesting news.

Yes that platform has been under construction for the last 3 months now... the tunnel however isn't there yet... my guess is the current 4th track will be extended to Peel and the 5th will be the new dead-end track.

 

[Bordercollie]

It's not GO construction related or project related. It's this.

We'll see if transit comes up in the Q and A. It's live now.

Are the new tunnel tracks under the 401 in use yet?

 

[Allandale25]

^ No.

 

[SaugeenJunction]

Are the new tunnel tracks under the 401 in use yet?

No, nor will they be soon. The tracks will be installed in the future as part of the OnCorr project.

 

[Ravager]

Wow didn't know about this OnCorr project! Is there a video explaining this project? I can't seem to find much on this.

 

[Allandale25]

^ It predates the OnCorr contract but when it was done Metrolinx said it would make sense to wait to install the tracks on either in end at the same time as the OnCorr tracks and for coordination purposes. So I'm sure the physical tracks through the tunnel are part of the OnCorr contract.

 

[ProjectEnd]

Hadn't seen this from Metrolinx, but I might just be late to the game:

 

[Allandale25]

Video in tweet.

#LakeshoreEast: See video of crews installing steel piles for the retaining wall in #Toronto. This work is part of the Toronto Lakeshore East Rail Corridor project, which supports more frequent GO Train service.
#MetrolinxFYI

https://twitter.com/x/status/1602709944503001089

 

[Northern Light]

Video in tweet.

https://twitter.com/x/status/1602709944503001089

From the Video:

 

[Northern Light]

Muddling through OLT files, cause what else does one do on a day off, when the weather is at it is.......? LOL

I came across this; and wondered, do we know about this, did I forget about this?

 

[crs1026]

^ Was this about the connection between TTC Dundas West and GO Bloor?

It was always understood that the government had begun to expropriate as negotiations weren’t successful.

Once the project got traction, the end settlement has dropped out of sight.

- PUl

 

[felix123]

^ Was this about the connection between TTC Dundas West and GO Bloor?

It was always understood that the government had begun to expropriate as negotiations weren’t successful.

Once the project got traction, the end settlement has dropped out of sight.

- PUl

Does the cancelled hearing indicate that negotiations resumed, or is it more likely to just be that it's been postponed for whatever reason?

 

[Northern Light]

^ Was this about the connection between TTC Dundas West and GO Bloor?

It was always understood that the government had begun to expropriate as negotiations weren’t successful.

Once the project got traction, the end settlement has dropped out of sight.

- PUl

The intent was to go through the Crossways, which is not a CP REIT property last I heard.

So.........hmmmm