When I saw this, wondered if it’s because it’s on the west bank of the Ashbridge’s Creek, now buried underground. TTC tweeted earlier today Labour Day that all is back to normal for 506 streetcar.
From Toronto Star:
Large sinkhole opens on Gerrard St. E.
Published on Sun Sep 06 2015
Construction crews are working to repair a large sinkhole that opened on Gerrard St., just east of Greenwood Ave.
The sinkhole is being linked to a water main break that occurred in the area.
Full story on thestar.com