11/09/2026
This year is not only special for Herrenknecht, but also for one of our long-standing customers and partners, today known as Implenia.
The story began in 1830 with Locher & Cie. The Locher brand has a rich heritage in construction and engineering. In 1998, the company became part of Zschokke Holding, which merged with Batigroup in 2006 to form Implenia.
Today, the Swiss-based company proudly looks back on 160 years of creating the future.
Together, we share more than 35 years of collaboration and got involved in major lighthouse projects: N3 Bözberg Aarau (pic1), Tunnel du Mont Russelin (pic2), San Pellegrino, Murgenthal, Zürich–Thalwil, Zurich Kl**en Airport (pic3) or Oenzberg tunnel, to name just a few.
In 2003 came a major milestone: the Gotthard Base Tunnel (pic4).
In 2017, more than 25 years after our first joint project, we reunited at the Bözberg Tunnel (pic5). Followed: Albvorland Tunnel (pic6), the innovative E-Power Pipe® installations at Großgartach and Bacharach (pic7), Lyon Metro Line B, the Brenner Base Tunnel (pic8), Grand Paris Express (pic9), Toulouse Metro Line C.
And of course, we cannot forget the second tube of the Gotthard Road Tunnel, which started in 2021 (pic10).
This impressive project list speaks for itself, even if not complete 😊.
If you want to know more, click here: https://implenia.com/en/about-us/history/
Just as at Herrenknecht, underground construction has a long and successful history at Implenia and undoubtedly an equally bright future.
We wish our valued customer and partner a very happy anniversary and continued success for the years ahead!
Pic 1: N3 Bözberg Aarau, 1993, Single Shield, Ø 11.80m
Pic 2: Tunnel du Mont Russelin, 1992, Single Shield, Ø 11.74m
Pic 3: New Luggage System Zurich - Kl**en Airport, 2001, Mixshield, Ø 6.28m
Pic 4: Gotthard Base Tunnel, 2011, 2x Gripper TBM, Ø 8.81 / 9.41m
Pic 5: Bözberg Tunnel, 2017, Single Shield, Ø 12.30m
Pic 6: Albvorland Tunnel, 2019, 2 x EPB-Shields, Ø 10.82m
Pic 7: Großgartach und Bacharach, 2019/2021, E-Power Pipe
Pic 8: Brenner Base Tunnel, 2025, 2x Single Shields, Ø 10.25m
Pic 9: Grand Paris Express Project (L15 south, extension L11, L17), 2023, 4 x EPB-Shields, Ø 9.08/9.83m
Pic 10: Gotthard Road Tunnel (second tube north), 2023-ongoing, Gripper TBM Ø 7m, Single Shield Ø 12.22m