Niagara Tunnel TBM Back-Up Carrier Removal

Niagara Tunnel Boring Machine Project

The back-up carrier is a ‘train’ of four structures that follow the TBM in the tunnel (see project ‘Niagara Tunnel Boring Machine Removal (Big Becky)), the largest of them being five stories tall, support equipment, power supplies and material storage. Weighing up to 500,000 lbs each, the back-up carrier structures varied drastically and each required… Read more »

Niagara Tunnel Boring Machine Removal (Big Becky)

Niagara Falls Tunnel Arch Form

The largest hard-rock Tunnel Boring Machine (TBM) in the world, ‘Big Becky,’ completed drilling a 14.4m (47.4ft) diameter tunnel 10.2 kilometers long under the city of Niagara Falls. The Niagara Tunnel will provide the electrical need of 160,000 homes by adding 1600 gigawatt-hours of power per year to the Sir Adam Beck Generating Station. Western… Read more »