Renewal Ritom Hydro­electric Power Station
Renewal Ritom Hydro­electric Power Station

Renewal Ritom Hydro­electric Power Station


Built in 1920, SBB’s Ritom hydro­power station in Tessin is being re­furbished and ex­tended to improve electricity supplies to the Gotthard rail­road. For this purpose, the new, greatly en­larged pressure line to Lago Ritom, which is 800 meters higher, has been re­ocated completely under­ground. Marti Group worked on this complex overall re­furbish­ment on behalf of Ritom SA. Due to water ingress and geological fault zones, the various teams were presented with major challenges, particularly when performing work inside the mountain.


Ritom SA c/o FFS SA


Marti Tunnel AG
Mancini & Marti SA
Marti Technik AG
Simatec Maschinenbau AG
Alwatec AG Umwelttechnik
Renesco AG
Stump-BTE Bautechnik AG
Marti AG Basel

Construction period

2018 – 2022


Facts & Figures

special features

  • Access shafts, pressure galleries, and caverns in blasting operations, sloped shaft in TBM driving operations
  • Lower inclined shaft 42% (length 880m)
    Upper inclined shaft 90% (length 633m)
    Change in slope within a radius of 150m
  • Gripper tunnel boring machine with back­loading drill head and dual imple­mentation of mechanically self-inhibitory fall­back pre­vention device
Diameter tunnel boring machine
Total length pressure gallery

additional information

More projects