The Ontario government has kicked off the procurement process for the construction of the Yonge North Subway Extension tunnels.
The Yonge North Subway Extension scheme is one of Ontario’s priority transit projects, which also include the Scarborough Subway Extension, Eglinton Crosstown West Extension, Ontario Line and Hamilton light rail transit (LRT).
It involves the extension of the Toronto Transit Commission (TTC) Line 1 by 8km north from the existing terminus at Finch Station into the City of Richmond Hill.
Towards the end of April, Infrastructure Ontario (IO) and Metrolinx released a request for qualifications (RFQ) for the advance tunnel contract package on the Yonge North Subway Extension.
This project, which runs through the City of Toronto and York Region, will include an approximately 6.3km tunnelled segment, as well as an above-ground segment that will run along the existing rail corridor in the northern section of the route.
The advance tunnelling RFQ offers interested companies an opportunity to be included in the bidding process by asking them to present their qualifications and construction expertise. This brings the project one step closer to the start of major construction.
The RFQ outlines the scope of work to design, build and finance the tunnels, including:
- Approximately 6.3km of tunnelling works
- Design and construction of launch and extraction shafts, tunnels, and headwalls for stations and support of excavation for emergency exit buildings
- Design, procurement and supply of tunnel boring machines and tunnel liner segments
- Reinforcing and improving soil and works necessary to facilitate tunnelling under and next to the Canadian National (CN) Railway tracks and the York Durham Sewage System
- Construction of CN right-of-way separation barriers to expedite safe corridor access and construction.
Metrolinx and IO will review the submissions made through the RFQ and will create a shortlist of qualified teams that will be invited to bid on the tunnelling contract through a request for proposals. The RFQ can be downloaded here.
In February, work started at Finch Station on early upgrades to accommodate the future subway service.
In related news, the delayed Eglinton Crosstown LRT project continues to face challenges, as the consortium building the project, Crosslinx Transit Solutions (CTS), intends to litigate and stop working with the TTC.
This is the latest in a line of legal challenges by CTS, which comprises ACS-Dragados, Aecon, Ellis Don and SNC-Lavalin, related to delays caused in part by Covid-19 and quality control issues that Metrolinx expects the contractor to correct and pay for.
“This is another unacceptable delay tactic by CTS at a time when they should be submitting a credible schedule to Metrolinx for completing the project,” Metrolinx said in a statement.
Construction on Eglinton Crosstown LRT began in 2016. Once completed, it will run across Eglinton Avenue between Mount Dennis and Kennedy Station. The 19km corridor will include a 10km underground portion.