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Originally Posted by Muta
The downtown portion of the Green Line should be tunneled as much as possible, and this shouldn't even be up for debate. Do this project PROPERLY from the start, spend the money, and you'll be completely thanking yourself later. We are a cold-climate city and underground rail is essential for year-round usage, and we dually need the space at-grade for other transporation connections.
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Originally, the entire 4km stretch from 20th Ave N to 4th Street SE was tunneled and they were willing to spend $550M/km for it.
But due to geotechnical issues the risk and cost has become too high and the river crossing from Eau Claire will use a bridge and be at-grade on Centre Street N. And there's still a good chance that they still won't have enough money for that section, which is why it's Phase 2 of Stage 1.
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We ALWAYS, ALWAYS fall for this and then continually ask ourselves later 'why did we do that...'.
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Sometimes you have no choice, like when your 40 km for $4.6B project becomes 20 km for $4.6 B and then becomes <20 km for $5.5B.