Quote:
Originally Posted by MrMastodonFarm
Frink, you probably can't even answer this yet but where would the nw/s line turn to go underground downtown?
Big ass project wherever they go with it.
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Quote:
Originally Posted by mykalberta
This is what I wonder. How do you get underground after Sunnyside without closing down the line for an extended period.
Nevermind, I guess they wouldnt go underground until after 7 ave? But I guess that means closing 10 Street for a block for an extended period.
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I'm not sure how "set" the above map is. I would think there is a lot of head-scratching to do about the northwest end.
The tie-in to the south line is easy. They just take out the cinderblock wall that is between the current tunnel and the partial City Hall underground station.
The northwest side is tricky. It's all about having a enough room with which to make a portal that will get the trains from at-grade to the subway. The maximum gradient the trains can operationally handle is about 6%. The trouble is that with the north-south blocks being much shorter than the east-west blocks downtown, there isn't much room to make this happen considering the LRT crosses 4th, 5th, 6th and 7th Avenues at grade.
There may be just enough room between the bridge over the river and 4th Avenue to do it, but it would be very tight. Might have to raise 4th Avenue a bit to get that extra bit of clearance. Also, how do you do it without shutting down the northwest line for months?
If they do it as the map above (roughly) shows, it would almost assuredly require the acquisition and use of the property at the northeast corner of 8th Avenue and 9th Street SW (currently a surface parking lot) for construction/staging purposes at the very least.
There may be some other possibilities in there, but it won't be easy.