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TTC conducting geophysical investigations near Bloor and Yonge Streets, starting June 1



Update — Friday, December 11, 6:03 a.m.: The TTC expands the investigations to more sites starting Saturday, December 12.


Update — Friday, November 27, 5:37 a.m.: The TTC started early work on the project in the station Monday, November 30.


Update — Thursday, October 1, 9:18 a.m.: The TTC expands the investigations to more sites, starting Saturday, October 3.


Monday, June 1, contractors start geotechnical investigations, including drilling boreholes, as part of a TTC state-of-good repair project. (Currently, ongoing surveying and utility investigations are also taking place in the neighbourhood.) TTC contractors are working in the area between Bay and Church Streets and Collier and Hayden Streets.

Specifically, the crews work on:

  • Asquith Avenue between Yonge Street and Park Road;
  • Bloor Streets West and East between Bay and Church Streets;
  • Church Street between Collier Street and Park Road;
  • Cumberland Street west of Yonge;
  • Hayden Street between Yonge and Church Streets; and
  • Yonge Street between Yorkville Avenue and Hayden Street.

They work Mondays to Fridays from 7 a.m. until 7 p.m. for about two to three weeks at each borehole site. Work zones block traffic lanes and equipment and trucks are present on the roadway, as the crews work at each site. They may also return to previous sites after finishing the initial investigation, if necessary.

The contractor crews will maintain access to sidewalks and properties at all times. They may also temporarily paint white lines on the roadway. Expect noise and vibration from drilling, hydro-vacuuming and equipment.


The TTC has not identified the nature of the state-of-good repair project. Note, however, that the TTC and the City of Toronto intend to expand the capacity of the Bloor - Yonge subway junction — Bloor Station on Line 1 Yonge - University and Yonge Station on Line 2 Bloor - Danforth.

Bloor - Yonge capacity 3.jpg

Image, TTC, City of Toronto

Bloor - Yonge - capacity 1.jpegBloor - Yonge - capacity 2.jpeg

Image, TTC, City of Toronto via UrbanToronto.ca