Quote:
Originally Posted by Blue_Cypress
You want to tbm under the river and up through the north hill? There's a word for that: Arduous. That'll easily run 2 years behind whatever schedule you put it on.
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There is no real way to tunnel under a river without a TBM. I have no particular issue with having the cut and cover section start closer to the river or the bored section extending further north. I simply picked the vicinity of just 16 Ave because, my understanding of the engineering, leads me to believe that it would be the most feasible and least expensive option. I don't think the LRVs could manage the kind of grade that it would take to have a tunnel climb from below the river to an elevation suitable for cut and cover much further south than that.
I see no reason why it would add significant delays to the project. We will be digging a pit in Eau Claire for the (planned) terminal station of the SE LRT. It would not be that difficult to include provisions for lowering the machine there. The project, as I envision it, would essentially be a replication of Vancouver's Canada Line. It included a bored tunnel under downtown and across False Creek, followed by a length of cut and cover roughly equivalent to the distance from 16 Ave to Beddington Trail. The cost should be quite comparable, when adjusted for inflation and local conditions; we would likely want longer station platforms, driving up the cost, but we would not need the additional ~10 km of elevated track, allowing for some savings. In fact if, for whatever bizarre reason, we were inclined to include an airport connection along 96 Ave/Airport Trail, then it would basically be Calgary's Canada Line. If other cities can manage it, then I am sure Calgary can too.
The thing is, our ridership actually justifies projects of this scope. Compared to our North American peers, the C-Train sees ridership per route mile for in excess of any other surface LRT and quite comparable to, if not better than, many American subway systems like Washington, Atlanta, Los Angeles, and Baltimore. The only North American LRT systems that are really in Calgary's league are Monterrey's, in which one line is underground and the other is elevated, and Boston's Green Line, which includes significant underground portions. If we were an American city, the kind of ridership we could estimate would have the Feds giving us billions for Subways.