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T3G
Senior Member
Nothing happens to streetcars in the snow. It is not at all unusual to see rubber tired vehicles stranded, while rail vehicles sail right on through. The biggest concerns are idiot snowploughs blocking the trackage (not much of a concern on private rights-of-way), or cars parking closer to the tracks because of snowbanks (also not a concern on private rights-of-way). Ice storms are also a concern, but that's a different thing entirely.
crs1026
Superstar
That's actually the point, because at this late date any work going on (and holding up commissioning) is not maintenance but rather correction of deficiencies in the construction...., which the builder and ML will claim is the other guy's fault. Or unnecessary.
And while they argue, TTC will be unable to commence operation.
- Paul
PurplePinky
Active Member
Jonny5
Senior Member
They are totally different things. An ice storm doesn't really involve snow, at least through most of its cycle.
A simplified explanation is that it's a rare phenomenon where the ground temperature is actually colder than the temperature higher in the atmosphere, so rain falls and when it gets down to something on or near the ground that water freezes and the ice accumulates more and more with each rain drop. There doesn't have to be any snow for this to happen, though snow can come later after the ice is already there. They are rare. There was an infamous one here in 2013. There was a disastrous one in Quebec in 1998.
A snow storm has none of the above happen. It's just snow, no rain.
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smallspy
Senior Member
There's a over a kilometer of distance between Bayview and Mount Pleasant. Even if the tunnel was built at the same depth from ground level between the two, the slope between the two is insignificant to non-existant.
And to be honest, there's a very, very good chance that the LRTs on Eglinton will be less affected by ice than the streetcars on the rest of the system.
Dan
Metroscapes
Active Member
You guys were all getting sick of me joking about "Cracked foundation slab at Eglinton" but this is ever better.
I didn't even know you could have quick sand in non tropical regions.
Hahaha.
Bayview / Eg is the site of the former path of Walmsley Brook. It survives south of the CPKC tracks near the future Ontario Line MSF, and its headwaters are historically by Duplex and Montgomery. I traced its route in 2018.
I should also quote back to this:
TOtramz
Active Member
I like how the rumoured July 20th start date for RSD from Reddit has come and gone....
Just shows that Reddit information is far less reliable than what you can find on this site
Just shows that Reddit information is far less reliable than what you can find on this site
dowlingm
Senior Member
That's an interesting map as the stream path shows where the water from the "Leaside pond" (now 70 Wicksteed) came from
jordanmkasla2009
Active Member
The vehicles would be able to perform better than the streetcars since they are paired together and will use both car pantographs. You can fit one or both cars on a few trains with ice scraper contact strips for when freezing rain gets bad enough. The one benefit of having couple vehicles from the get go is the distributed power between cars.
jordanmkasla2009
Active Member
I found an article about Leaside's construction here
Leaside station box was dug down to 22 metres or 72 feet. The pilings for the station are even deeper. Some down to 27 metres and others down to as much as 50 metres. So I highly doubt anything in the area is sinking
Monarch Butterfly
Superstar
Same problems happened with Keele Station and High Park Station of Line 2. There are underground creeks in the neighbourhood of those stations. Keele School had to be rebuilt because of the rather loose soil
(High Park should have continued north of Bloor Street following those now buried ravines.)
(High Park should have continued north of Bloor Street following those now buried ravines.)
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nfitz
Superstar
Excellent work!
I've always wondered what happened if you managed to inadvertently dam across the more conductive sands and gravels where an old creek was, with foundations and caisson walls.
It wouldn't be the soils themselves that are the issue, but the groundwater rising higher than it used to in places, trying to find a new path. It shouldn't really be a problem other than leakage, unless they were somehow washing away all the fines - and that would take years. I've got a story to tell one day of a building on a different Toronto former creek, but it will have to wait a decade or two for the legal stuff to stop flying.
Gosh, that is deep! And presumably designed that way because of the unusual sands we've been discussing.
A 6264
Active Member
Thanks for this excellent work, I've always wondered where the creek ran, as I presumed it would be north to south. Since it does come out as a creek past the railroad tracks, I have to presume there is still running water underground. In the 1970s, when construction projects were probably not as well researched before they started, building sites downtown kept "rediscovering" Taddle Creek, forcing a change in plans after holes had already been dug!