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Il canton Grigioni potrà sfruttare le 4 aree ricavate nella galleria di base del San Gottardo nel quadro del progetto Porta Alpina (poi abbandonato) creando delle “finestre” che permetteranno di osservare il passaggio dei convogli, come è possibile nel traforo del Loetschberg.
Un’intesa è stata raggiunta tra il Governo di Coira e le FFS. Le aree si trovano sotto Sedrun, a 800 metri di profondità, a metà del tunnel più lungo del mondo
Porta Alpina: un'idea geniale accantonata l'anno scorso
Il progetto Porta Alpina, dapprima sostenuto anche dalla Confederazione, prevedeva una stazione dalla quale si poteva raggiungere, con ascensori, la Surselva. A causa dei costi (50 milioni di franchi) e di problemi legati alla fermata dei treni, che avrebbero diminuito le capacità del traforo, il progetto è stato accantonato definitivamente dal Consiglio federale nel maggio 2012.
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