Kitchener GO Rail Tunnel Excavation Complete

Published on February 16, 2021

Tunnels Under Highways 401 and 409 Support Two-Way, All-Day Kitchener Line Service




February 11, 2021


KITCHENER – The Ontario government has completed excavation of the second of two tunnels under Highways 401 and 409, bringing the Kitchener GO corridor one step closer to becoming a two-way, all-day rail service. This milestone represents a significant achievement in Ontario’s GO Expansion program supporting the creation of a modern, sustainable rail transit network in the province.


“I’m pleased to announce that Ontario has reached another important step in the delivery of Two-Way, All-Day GO service with 100 per cent excavation in both the Highway 401 and 409 Rail Tunnel Projects,” said Kitchener-Conestoga MPP Mike Harris. “A reliable rail network will be essential to recovery and economic growth in Waterloo Region and our government is committed to improving connectivity on the Kitchener Line.”


“This tunnel project will help increase capacity on the Kitchener corridor and, where possible, support all-day trips, in both directions to reduce congestion,” said Caroline Mulroney, Minister of Transportation. “Our goal is to establish a more reliable rail transit system in the Greater Golden Horseshoe, which will drive significant economic growth and job creation that will benefit the entire province.”


The Highway 401 and 409 Rail Tunnel Project includes a twin tunnel structure, and when complete, will provide space for two additional tracks in the future. Track, signaling, and communications infrastructure will be installed under a separate contract. Substantial completion for the 401 and 409 Rail Tunnel Project is expected to be

reached in the second half of 2021. 


This project is just one of more than 20 major projects currently under construction to support the province's GO Expansion program that will transform GO rail into a two-way, all-day rapid transit service every 15 minutes on core segments of the network.


“We are delivering on our commitment to bring fast, frequent rail service to Waterloo Region, Brampton, Mississauga, and Toronto,” said Kinga Surma, Associate Minister of Transportation (GTA). “By making these significant infrastructure investments, we will connect more people to jobs and improve passenger convenience, while increasing access to Ontario’s fastest growing urban cities.”




  • Each rail tunnel under Highways 401 and 409 is approximately 180 metres in length, or about 360 metres when combined, with an excavation that is 11 metres high by 9 metres wide.
  • Tunnel one reached 100 per cent excavation on August 1, 2020.
  • Both tunnels involved the removal of approximately 70,000 cubic metres of material.
  • Toronto Tunnel Partners is the project consortium constructing the twin tunnel structure.
  • The value of the contract is approximately $116.9 million.