Blork was quick off the mark today, getting the story and a photo about this afternoon's downtown emergency: a large crack was seen in a passage between the Bay and McGill metro and, fearing a collapse, authorities closed the Metro green line between Lionel-Groulx and Berri. Work being done to build the de Maisonneuve bike path has been suggested as a cause, but nothing's certain yet.

The STM website indicates the closure will last all weekend that that a temporary bridging bus service will be found on Ste-Catherine Street for eastbound riders and on René-Lévesque for westbound. I've also heard, but have no link, that there will be more trains on the orange line this weekend. A sizable perimeter around McGill station (see CBC article) has also been barricaded off while engineers figure out how extensive the damage is.

McGill station is normally the busiest of the system, and students will be going back to classes en masse fairly soon. Bragging about our way-cool underground city is predicted to be muted for some time.
posted at 17:36