Toronto transit projects are notoriously slow-moving, but you wouldn't know it from looking at the rapid work being carried out for the new Ontario Line subway.
The new 15.6-kilometre subway line, set to link Exhibition Place in the southwest with the Line 5 LRT in the northeast, has made considerable progress over the last year and continues to transform sites across Toronto, including stations, tunnelling, and a pair of bridges that will carry the new subway across the Don Valley.
The northwestern end of the 15-stop line will feature a significant stretch of elevated rail, inclusive of an enormous new high-level crossing of the valley, aptly named Don Valley Crossing.
The large concrete bridge now rising from the valley floor is one of two bridges being constructed over the Don River and Don Valley Parkway, along with a smaller arch bridge under construction further south.
Metrolinx shared an update on Wednesday showing just how far the bridge construction has progressed in the last year, moving from initial foundations to rising concrete piers that will support the bridge deck above.
Five piers that will support the bridge will eventually rise 32 metres above the valley floor, or roughly the height of a ten-storey building. At that height, the bridge will also rise into, and potentially even block out, a popular view of the Toronto skyline from the nearby Leaside Bridge.

Rendering of the new Don Valley Crossing bridge set against the Toronto skyline as seen from the Leaside Bridge: Metrolinx
Once complete, the bridge will carry Ontario Line trains across the valley and link Thorncliffe Park and Flemingdon Park stations.
Metrolinx