Official window
2021–2030
Target year: 2030
Project status
Second Gotthard tunnel: how far along is it?
This page summarises the second Gotthard tunnel project with calendar-based progress, remaining time, and the kind of technical numbers that tunnel geeks love.
Calendar progress
55.9%
Calendar progress across the official build window
Days left
1,610
Days until the end of the 2030 build window
Days since TBM start
538
TBMs started the main drive in February 2025
Useful nerd stats
16.9 km
official tunnel length
12.3 m
diameter
7.4 million t
rock to remove
68
cross passages approx.
126.6m CHF/km
project cost per km
423
days per half-bore at 20 m/day
Official construction facts: the 16.9 km bore advances at about 20 m/day per TBM on average, with around 680,000 m³ of concrete and 160,000 m² of green area mitigation.
The project phase for the second bore runs through 2030; the first bore is then scheduled for refurbishment from 2030 to 2033.
Quick notes
- TBMs are driving from both portals toward the centre.
- The second bore is planned for 2021–2030.
- The first bore is scheduled for refurbishment from 2030 to 2033.
FAQ
When will the second Gotthard tunnel open?
Official sources point to 2030 as the target year; no exact day/month opening date is published.
Is the progress number physical progress?
No. The percentage is the calendar progress across the official 2021–2030 build window.
How fast are the TBMs moving?
The official project page cites an average of about 20 metres per day per machine.