Site work for a bridge / tunnel in Toronto, Ontario. Completed plans call for site work for a bridge / tunnel.

The Advance Tunnel Contract package includes all tunnelling and related activities necessary to build the tunnel along the prescribed alignment, including the delivery of twin tunnels (metro size 5.6 m internal diameter), with launch and extraction shafts, utility relocations, headwalls for stations and emergency exit buildings (EEBs) and temporary support of excavation for EEB's, as required. The YNSE reference alignment requires that two Tunnel Boring Machines (TBMs) be launched from a temporary launch shaft located south of Langstaff Road East and adjacent to the CN rail tracks. The shaft will be located immediately west of the CN rail tracks and north of a location where the TBM tunnels run at shallow depth below the CN tracks for a distance of approximately 430 m. Given the TBM tunnels are located below the CN tracks, as part of the Advance Tunnel (AT) contract, a design solution has been developed whereby the CN tracks would be temporarily diverted to the east, thereafter the Advance Tunnel contractor will be required to undertake ground improvement / replacement works so that the TBM tunnelling can be undertaken without risk of major settlement or disturbance below or adjacent to the CN tracks. The Advance Tunnel (AT) Package includes, but is not limited to: - All tunnelling activities necessary to build the bored tunnel along the prescribed alignment through a minimum of 300m radius curves - Design and procurement of TBMs - Design, manufacturing, and installation of precast concrete tunnel liners (PCTLs) - Design and construction of launch and extraction shafts - Design and construction of prescribed headwalls for Emergency Exit Buildings (EEBs) and stations, as required - Design and construction of support of excavation (SOE) for Emergency Exit Buildings (EEBs), as required - Utility work including relocation and support in place of existing utilities - Protection of existing utilities and structures where needed - Clearing and grubbing (removal of debris/obstructions) at location of Tunnel launch shaft - Provisioning of access roads for construction laydown areas and work areas - Construction of CN Right-of-Way separation barriers to expedite safe corridor access and construction - Ground improvement / replacement under and adjacent to CN tracks and York Durham Sewage System. - Prescribed treatments for noise and vibration mitigation during construction of the tunnel, in the construction zone of influence August 6, 2025 Infrastructure Ontario (IO) and Metrolinx have awarded a fixed-price contract of $1.4 billion to North End Connectors to design, build and finance the advance tunnelling project for the Yonge North Subway Extension. The twin 6.3-kilometre tunnels will run from Finch Station on TTC Line 1 to south of Langstaff Road in Markham, where the extension will shift to a surface-level segment. The North End Connectors team includes: - Applicant Leads: Aecon Infrastructure Management Inc., Fomento de Construcciones y Contratas Canada Ltd., Ghella Canada Ltd. - Construction: Aecon Infrastructure Management Inc., Fomento de Construcciones y Contratas Canada Ltd., Ghella Canada Ltd. - Design: EXP Services Inc., TYPSA Inc. - Financial Advisor: National Bank Financial, Aecon Concessions, Fomento de Construcciones y Contratas Canada Ltd, Ghella Investments & Partnerships SpA. The tunnelling project is being delivered as a Design-Build-Finance contract, using IO's Public-Private-Partnership (P3) model. The Yonge North Subway Extension advance tunnelling project underwent an open, fair, and competitive procurement process, overseen by a third-party advisor. North End Connectors submitted the proposal that delivers the best value for Ontarians. Early works for the project are well underway and major construction will begin once design work is complete. The scope of work for the project includes: - Approximately 6.3 kilometres of tunnelling for the approximately eight-kilometre extension. - Tunnelled route: North along Yonge Street from Finch Station, curving east along Bay Thorn Drive to south of Langstaff Road. - Design and construction of launch and extraction shafts, twin tunnels, headwalls for emergency exit buildings and stations, and support of excavation for emergency exit buildings. - Procurement and installation of tunnel boring machines and precast concrete tunnel liners. Contract Value: $1.44 billion