Photo Album 23: Niagara Tunnel Ontario – Canada

Created: 25 December 2011

Niagara Tunnel Project (NTP), Niagara Falls, ON, Canada
 Selection of Pictures by Alfred MOERGELI, June 8 & 13, 2007
(RETC 2007 site visit – courtesy of STRABAG).

At the time of our visits the world’s biggest hard-rock Tunnel Boring Machine (TBM) was in a fault zone and, therefore, had to be upgraded, in situ and underground, by the contractor, together with the TBM manufacturer, to succesfully master the new geotechnical challenges.

For more details please ee the Owner’s website Ontario Power Generation (OPG).