https://canada.constructconnect.com/dcn/news/associations/2020/05/rccao-report-urges-subway-planners-to-learn-from-past-project-mistakes

Canada's Enbridge applies for the US permits to build the Straits of Mackinac oil pipeline tunnel.

https://wtop.com/business-finance/2020/04/enbridge-seeks-permits-to-build-great-lakes-oil-tunnel/

#Toronto's Don and Humber come out.
https://urbantoronto.ca/news/2020/04/western-tunnel-boring-machines-extracted-crosstown-lrt

Top 20 transportation stories of 2019 in Metro #Vancouver

https://dailyhive.com/vancouver/metro-vancouver-transportation-2019
#bc

3 Tunnels line up for remake in 2020: Ville-Marie, the Viger and the Louis-Hippolyte La Fontaine tunnels.

https://montrealgazette.com/news/local-news/2020-is-the-year-we-awaken-from-the-five-year-turcot-nightmare
#Montreal #Quebec #Canada

Dec. 14, boring officially began on the new Coxwell Bypass Tunnel, which is the first stage of the $3-billion Don River and Central Waterfront Wet Weather Flow System.
The new Coxwell Bypass Tunnel will have a diameter of 6.3 metres and a length of 10.5 kilometres.

https://www.toronto.com/news-story/9776993--donnie-gets-to-work-digging-east-toronto-s-new-coxwell-bypass-tunnel/
#Donnie #Toronto

They are building this rail tunnel, only 180 meters long, under the Macdonald–Cartier Freeway (so called Highway 401). They claim they are using these `innovative techniques`. To me, they are not new techniques. Am I missing something?

"SEM (sequential excavation method): is a modern tunnel design and construction method. Earth, rock and debris are removed steadily at a one-metre pace, with the tunnel divided into sections. Machinery like the ‘scooptram’ front end loader to haul away material five tonnes at a time is used.

Excavation with Shoring: during excavation, the exposed area is immediately supported by spraying a layer of ‘shotcrete’, by a shotcrete robot, after which a reinforced temporary lining called “welded wire fabric”. Then lattice girders are installed as an additional measure.

Canopy tubes: in spring, canopy tubes were installed using auger boring. These tubes are 12-metre-long metal hydraulically pushed by a giant drill under the highway to encase the tunnel. As the augers turn they expel the material they excavate from out of them. These canopy tubes are the solid structure of the tunnel, in order for the passage of the tunnel to be bored through.
"

https://bramptonist.com/theres-a-massive-tunnelling-project-going-on-under-the-401/
#canada #ontario

WSDOT Wins $57.2-Million Against Contractor In Court Case
https://www.enr.com/articles/48341-wsdot-wins-572-million-against-contractor-in-court-case

Tunnel boring set to begin for Coxwell Bypass Tunnel to improve quality of #Toronto's waterways.
The City of Toronto is investing more than $3 billion to keep combined sewer overflows out of our waterways, improving water quality in the Don River and along the central waterfront of Lake Ontario.

The tunnel boring machine (TBM), named Donnie, will dig the 6.3-meter diameter and 10.5-kilometer long Coxwell Bypass Tunnel, approximately 50 metres deep, parallel to the Don River.

The Coxwell Bypass Tunnel is an important part of the overall Don River & Central Waterfront (DR&CW) project. This tunnel will capture, store and transport combined sewer overflows, a mix of rainwater and sewage, for treatment at the Ashbridges Bay Treatment Plant.

https://www.newswire.ca/news-releases/cleaning-up-our-waterways-tunnel-boring-set-to-begin-for-coxwell-bypass-tunnel-to-improve-quality-of-toronto-s-waterways-817210109.html

Past but not gone: Building the Port Mann Water Supply Tunnel.

http://www.metrovancouver.org/media-room/video-gallery/the-sustainable-region/230070643
#Vancouver