Tunnel boring machine had been stuck 18 metres underground since spring 2022 Lucas Powers · CBC News · Posted: Oct 11, 2023 1:23 PM EDT | Last Updated: October 11, 2023 ...

The McL-36/42 auger boring machine delivers 633,333 pounds of forward thrust and 113,500 ft.-lbs. peak auger torque for cased bores to 42 inches. It is powered by a 96-hp four-cylinder diesel engine.

"The boring for the project is schedule to commence in December, 2007 at Al Ras towards Burjuman for the Green Line. The tunneling will pass under the creek up to a length of 2.5 km and at a maximum ...