Y ear: Technology: 2007 Rock Pressure Grouting Ongoing strong demand for clean, renewable electricity in Ontario, Can- ada resulted in the creation of the Niagara Tunnel Project. Due to be commissioned in 2013, the new 10.4 kilometre long, 14-metre diame- ter Niagara Tunnel was built with the help of the world’s largest hard rock tunnel boring machine, “Big Becky”. The tunnel was advanced from downstream to upstream. When Big Becky broke thr

Join for free to read