This ninth instalment of the Lunchtime Lecture series focused on Specificity and Challenges of long tunnels at great depth and was organised in coordination with WG17. 

This epside featured 3 lectures:

• Long and deep tunnels : why are they so specific ?  – Magali SCHIVRE      - Animator of ITA WG17   - INCAS Partners   - FRANCE
• TBMs design & mitigations measures for long & deep tunnels - Brad GROTHEN     -  ROBBINS  - USA
• Logistics challenges regarding long & deep tunnels – Alejandro SANZ   -    gGRAVITY Engineering Dragados  - SPAIN

The session finished with a Q&A with all speakers.