Millennium Line - Evergreen Extension | Completed

[Klazu]

Is Evergreen being on-track schedule and budget wise?

[Olden Retreiver]

Originally Posted by jsbertram

The notice was for Spring 2014, and the renovation of the portal for Phase II tunneling was completed several months ago, so I'm not sure why this is still on the website - other than to give the locals a reason for so much truck traffic in the area.

The newer (unexpected?) work is described near the top of the page:

"Temporary Lane Closure on Cecile Drive

As part of Evergreen Line tunnel construction, there will be single lane alternating traffic on Cecile Drive just west of Highview Place starting on Friday, November 21. This lane closure will allow crews to inject cement grout from the surface to strengthen soils in front of the tunnel boring machine (TBM). This is required so crews can inspect and change the cutter head tools and undertake regular maintenance before the TBM advances."

[STEELWHEELS]

I have a feeling the real reason for the Cecile Drive work is to prevent
a cave in of the road (not so "crews can inspect and change the cutter head tools", as said) as the TBM passes underneath.
I wouldn't be surprised if more grouting is announced for Clark Rd. - where the TBM will follow for most of the remaining tunneling.

[queetz@home]

Originally Posted by STEELWHEELS

I have a feeling the real reason for the Cecile Drive work is to prevent
a cave in of the road (not so "crews can inspect and change the cutter head tools", as said) as the TBM passes underneath.
I wouldn't be surprised if more grouting is announced for Clark Rd. - where the TBM will follow for most of the remaining tunneling.

Regardless of the reasoning, its a wise precaution. But isn't the tunnel underneath the homes beside Clarke Road?

[STEELWHEELS]

The tunnel runs under the centre of Clark Road from the last curve of Port Moody hill to well past Robinson St.

[SOSS]

Shouldn't the 'grouting' have already been planned when the contracted put together their bid? I can understand some unforceen cercumstances but they should have known the ground variable when completing the RFQ. And if it was know it would have been announced, right?

[Olden Retreiver]

Originally Posted by STEELWHEELS

I have a feeling the real reason for the Cecile Drive work is to prevent
a cave in of the road (not so "crews can inspect and change the cutter head tools", as said) as the TBM passes underneath.
I wouldn't be surprised if more grouting is announced for Clark Rd. - where the TBM will follow for most of the remaining tunneling.

I would not be surprised either if there were additional grouting at Clarke Road as well. They did some drilling in the middle of Clarke right after the sinkhole incident. At the very least, it seems they decided they had inadequate information on ground conditions there.

[officedweller]

At least the private contractor EGRT Construction is the one that bears the tunnelling risk...

Risk allocation summary:


http://www.partnershipsbc.ca/files-4/documents/PBCEvergreen.pdf

[finalcoolman]

Tunnel boring has stopped AGAIN for another three weeks. Three weeks from now is the beginning of the holiday break, so that means any meaningful progress now won't be made until after the New Year.

http://www.theprovince.com/Evergreen+Line+Alice+boring+just+getting+maintenance/10413442/story.html

[SOSS]

I just don't see how they can remain on schedule for summer 2016. I figure it will take 6 months or more for completing walls, floors, track etc after Alice is done boring the tunnel. Testing will be a couple months. It seems really delayed...

[finalcoolman]

Originally Posted by SOSS

I just don't see how they can remain on schedule for summer 2016. I figure it will take 6 months or more for completing walls, floors, track etc after Alice is done boring the tunnel. Testing will be a couple months. It seems really delayed...

Well they could sure save some time and open on time if they omit doing that divider wall

[queetz@home]

Originally Posted by SOSS

I just don't see how they can remain on schedule for summer 2016. I figure it will take 6 months or more for completing walls, floors, track etc after Alice is done boring the tunnel. Testing will be a couple months. It seems really delayed...

All the more reason why they should open Burquitlam as soon as possible. Why wait for the entire line to finish because of tunneling delays when you have a brand new shiny station that is ready, available and just screaming to be used?

We could have the Evergreen Line running to Burquitlam as early as this summer...

[VancouverOfTheFuture]

Originally Posted by queetz@home

All the more reason why they should open Burquitlam as soon as possible. Why wait for the entire line to finish because of tunneling delays when you have a brand new shiny station that is ready, available and just screaming to be used?

We could have the Evergreen Line running to Burquitlam as early as this summer...

because it'd be pointless to open up 1 station.

[Jebby]

Originally Posted by VancouverOfTheFuture

because it'd be pointless to open up 1 station.

Yes. The cost involved in reconfiguring the entire system software and rerouting bus routes does not make sense incurring, not to mention the confusion it will cause a lot of people, to add one station to the system for a couple of months.

[Kisai]

Originally Posted by Jebby

Yes. The cost involved in reconfiguring the entire system software and rerouting bus routes does not make sense incurring, not to mention the confusion it will cause a lot of people, to add one station to the system for a couple of months.

From a software development POV, it's probably inconsequential. The question really is if doing so requires the new VCC's installed or not. If the VCC's are installed, then having the full line entered but terminating early is probably a trivial effort. The danger is if it would energize the lines while workers are on it.

[SOSS]

Is Burquitlam station going to be in Zone 2 or 3? I know the rest of the new stations will be in Zone 3.

[GlassCity]

Originally Posted by SOSS

Is Burquitlam station going to be in Zone 2 or 3? I know the rest of the new stations will be in Zone 3.

Zone 3 according to wikipedia.

[jsbertram]

Originally Posted by officedweller

At least the private contractor EGRT Construction is the one that bears the tunnelling risk...

Risk allocation summary:

[snip]

But the risk of tunneling is a different issue, separate (but related to) the on-time opening of the line.

Contractor took the risk of single-tunnel and may lose money building it even if the tunnel is completed as scheduled but over-budget.

If the tunnel is completed late (and over-budget), the contractor may also be whacked with late-completion fines because they are delaying other tasks that can only be done after tunneling is finished before completion of the project.

[officedweller]

That comment was in reference to delays and costs incurred arising from the soft soils / change in soils necessitating changing the cutter heads
- i.e. tunnelling risk relates to accepting the risk on the soil conditions and any resulting delays and costs.

If a delay is caused by a factor for which the contractor has accepted the risk, then the project schedule remains the same and the contractor must make up the lost time by accelerating the work at its own cost (or might miss the completion date).
If a delay is caused by force majeure or caused by the contracting party, the contract might provide for a extension to the project schedule to accommodate the delay.

[SOSS]

I recently noticed that there is one-heck of an overbuilt support beam that is just under the Moody Street overpass above the Evergreen track bed. The new beam doesn't touch the overpass. I suspect that this is a just-in-case disaster strikes structure. If the bridge collapses it will hit this beam and not collapse onto the Evergreen tracks.