Graphic representation of the construction project in section 421, crossing below the BLS mountain route, construction phases
Graphische Darstellung des Bauprojekts im Teilabschnitt 421, Unterquerung BLS – Bergstrecke Bauphasen
Construction begins
Although work actually began earlier, the first blasting at the Lötschberg is regarded as the official start of NRLA construction.
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