Transit – Ontario Line Subway – South Civil

transit-ontario-line-subway-south-civil

Owner: Metrolinx

Client: Ontario Transit Group

Project: Ontario Line South Civil Contract

Description:  The Ontario Line's South Civil section is a $6 billon dollar design-build-finance project to build a 6 km twin-tube subway tunnel from Exhibition Station to the Don Yard portal. The project features one above-ground station at Exhibition, two underground stations integrated with TTC's Osgoode and Queen stations, and four new underground stations at King/Bathurst, Queen/Spadina, Moss Park, and Corktown. The project aims to enhance transit connectivity, reduce congestion, and support economic growth, with completion expected by 2030.

Role:  4Sight’s role is to provide Utility Coordination and Subsurface Utility Engineering services to manage the risks associated with Utilities during the design phase of the project for the PPP construction Contractor.

OLS Corktown Station_2023

Related projects

Working Safely Through Every Season

By Nicola Pickard | July 20, 2026

We recently asked our team whether they would rather spend a day working in the field in -20°C or +35°C weather. While the answers were split, one thing was clear: both extremes bring their own unique challenges. As temperatures continue to rise this summer, we’re mindful of the impact that heat can have on our […]

Early History of Subsurface Utility Engineering

By Nicola Pickard | July 14, 2026

No worries here about damaging underground utilities! Right? Wouldn’t it be nice if we could all say yes? Many project owners can, but many cannot. Subsurface Utility Engineering (SUE) has become an essential component of modern infrastructure planning, risk management, and design. As cities grow and underground networks become increasingly congested, the need for accurate […]

Newsletter

4Sight_UC_BusStation
form

Contact

P: 1 (289) 385-3303
E: info@4SightUE.com

Address

Headquarters

4Sight Head Office
2100 Forbes Street, Unit 1
Whitby, ON 
L1N 9T3



126 Market Street 
Commercial Unit #1
Philadelphia,
PA 19106