In a major milestone for Rio Tinto鈥檚 Kemano T2 hydropower project in British Columbia, the tunnel boring machine has broken through to the other side.
The Kemano T2 Project is completing a second tunnel to carry water into the Kemano Powerhouse, to ensure the long-term reliability of the power supply for Rio Tinto鈥檚 BC Works smelter in Kitimat.
The tunnel boring machine cut 7.6 kilometres through the rock in remote mountains over 30 months, completing the route for a 16 kilometre tunnel that was started in the early 1990s.
鈥淭his is a significant milestone towards finishing the second tunnel and securing the long term reliability of hydropower for Rio Tinto鈥檚 smelter in Kitimat, which produces some of the world鈥檚 lowest carbon aluminium,鈥� said Kemano T2 Project Manager Alex Jones in a media release.
鈥淏oring this tunnel is a highly-skilled and technical feat that has been achieved in an extremely remote location that is only accessible by air or sea.聽We thank all of our partners who are supporting this important project 鈥� from our employees, to contractors, First Nations, government and community members,鈥� said Jones.
The 1,300 tonne Herrenknecht tunnel boring machine is named聽迟濒鈥檜驳丑耻蝉聽by the Cheslatta Carrier Nation after a legendary giant monster snake and is decorated with artwork by Haisla聽Nation students. It is 190 metres long and more than six metres in diameter.
The tunnel will be filled up with water in the middle of next year, with the project expected to be complete in the second half of 2022.