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A comment on After 27 years within budget Austria open 6thlongest railway tunnel in the world. Parent comment

Re:After 27 years within budget Austria open 6thlongest rail... by m4rtink on Friday December 12, 2025 @11:39AM (#46245792)
A tunnel on the Kurobe gorge railway (originally used for dam contruction, now partially open to tourists) has reached 160 °C (!!) during construction, but has cooled down to manageable 40 °C since.

https://en.wikipedia.org/wiki/Kurobe_Seny%C5%8D_Railway

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