Construction Progress Update – Science Centre Station


When you think of the biggest Crosstown sites, the obvious one comes to mind – the Maintenance and Storage Facility and Mount Dennis Station. However, much further east on Eglinton, crews are operating on a complex site nearly one kilometre long; Science Centre Station. 

The station will include two separate tunnel portals, two entrances and a large bus bay. Because Science Centre Station sits at the intersection of two massive arterial roads – Eglinton Avenue and Don Mills Road – the Crosstown will go back underground at the intersection to avoid impacting traffic flow, and also to protect for a possible, future connection to the planned Relief Line. This makes for a complex and geographically vast operation. 

“Progress at the site has been steady for over a year now,” said Murray Heppner, director for Science Centre Station, Kennedy Station and the at-grade section. “Despite the complexities and challenges at this location, we’ve been able to meet our targets and stay on schedule, partially thanks to the mild and dry weather of late.”

The pedestrian tunnel that will link the main entrance to the bus bay is nearing completion, while excavation is almost 70% complete at the main entrance and well underway on the East and West Don Mills Portals. 

Excavation work at West Don Mills Portal Crews excavate below the first tieback level at the West Don Mills Portal.

At the East Don Mills Portal, we recently poured a two-foot thick invert concrete slab, which will bear the weight of the light rail vehicles as they travel between Science Centre Station and the at-grade section of the Crosstown. 

Invert Concrete Pour at East Don Mills Portal

East Don Mills Portal invert slab

In the coming weeks, crews will move to the next stage of traffic configuration for Don Mills and Eglinton, which will see vehicles rerouted to the east side of Don Mills to allow work to commence on sanitary sewer replacement work at the northwest side of the intersection. 

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