Quote:
Originally Posted by Uhuniau
Tunnelling under the river also means long approach slopes that mean the closest stations to the river shore will be well inland, making the system, yet again, as useless as possible for transit service in the core.
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Tunnelling on the Portage/Lebreton side has less of a level change between either shore and the river is shallow. The geology is likely good for tunnelling, waterfalls and rapids usually happen in spots where rock is tougher for the water to erode. The reason the downtown tunnel had to dip far below the canal was there is too much built environment and sensitive structures around. It's mostly greenspace on the other side.