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T3G
Senior Member
Can politicians shut up? I mean Jesus. The ruling class is not exactly made up of the brightest minds in the country, but the soundbites in this article seem unusually vapid:
Well, which is it, generational or once in a lifetime? And is this an admission that in 10 years when the TR replacements need to be procured there won't be any money coming for them?
Well, which is it, generational or once in a lifetime? And is this an admission that in 10 years when the TR replacements need to be procured there won't be any money coming for them?
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81-717
Active Member
And you're happy about that because?...And is this an admission that in 10 years when the TR replacements need to be procured there won't be any money coming for them?
I get why you think of the T1s as the last "classic" design that you want to keep longer, but it's the first time hearing you say the same thing about the TRs. So one day you'll be saying the same about the future T1 & TR replacements, then?
Allandale25
Senior Member
I'm not clear what design choices he's referring to. The graphic he included seems to suggest one of his topics is the single bore TDM.
nfitz
Superstar
Yes, which only makes the TBM (and stations) deeper, and increases the soil being removed. And increases the odds of hitting a large erratic.
And then there's the bizarre design choices. Particularly the deep tunnel at Lawrence, rather than the original design to daylight at the creek just north of Lawrence, and use a bridge. This would have made Lawrence station very shallow - in a location where it's well known there are artesian conditions. The tunnel and station are now so deep, that they are going to need significant works under the station - which gets very close to a very productive sand aquifer. I can't wait until they make the "unexpected groundwater conditions" excuse in the mid-2030s for further delays.
micheal_can
Senior Member
The thing is, all politicians seem to do this. It is not a new phenomenon, at least not in the last few decades. I feel the general public is getting tired of it though.Can politicians shut up? I mean Jesus. The ruling class is not exactly made up of the brightest minds in the country, but the soundbites in this article seem unusually vapid:
Well, which is it, generational or once in a lifetime? And is this an admission that in 10 years when the TR replacements need to be procured there won't be any money coming for them?
NIV
New Member
Good to finally find out what the problem is. I believe they realized there was a problem immediately, I found it strange they started doing headwall construction on the SE corner of McCowan and Sheppard in March/23 two months after tunneling began. I wonder if this was supposed to be an intervention shaft. The first mention of an intervention shaft for “maintenance” was the community letter sent out to the Brimorton neighborhood about the need to complete the headwalls south of that intersection and expose the TBM for maintenance this fall. Unfortunately it looks like it needs to be fixed where it is now. After almost 2 years of tunnelling they are just a fraction of the way there. Two years was the original time frame for complete tunnelling. Station construction can’t start until tunnelling complete. My guess is that we are at least 2 years behind and that’s if they can solve the problem.
chrisw
Active Member
Well, at least all the delays are improving the ROI of the busway.
crs1026
Superstar
The questions I would have for ML are
1) When was the "non-functioning" of the TBM first identified?
2) When was the decision made to shift the location of the "intervention shaft"?
3) What is the impact on contingency and projected tcd for the tunnelling drive?
4) What is the impact on start and completion dates for downstream tasks eg stations, emergency shafts?
I am speculating that those first two dates are now months in the past
Which leads to my final question
5) Why was this not disclosed publicly before now?
- Paul