Advertisement

Tour of twin tunnels for Edmonton’s Valley Line southeast LRT

Click to play video: 'A behind-the-scenes look at the Valley Line LRT project' A behind-the-scenes look at the Valley Line LRT project
WATCH ABOVE: For the last several years, the city has been hard at work building a pair of massive tunnels north of the river in Edmonton. The tunnels will eventually be used by trains on the Valley Line. Vinesh Pratap goes on an underground tour. – Mar 11, 2020

For the last several years, work has been underway on tunnels underneath 95 Street, just south of Jasper Avenue.

“The excavation volume of soil that was removed is roughly 70,000 tonnes,” said Dallas Lindskoog, who is with TransEd, the public-private partner building the 13-kilometre line from Mill Woods to downtown.

Excavation on the twin tunnels, each about 400 metres in length, started in March 2017 and was complete by April 2018.

READ MORE: Edmonton councillors confirm more details on SE Valley Line LRT delay

Since then, workers have been lining the tunnel for stabilization.

First is a layer of what’s called shotcrete, followed by a waterproof membrane lining and then a steel-fibre reinforced mix for the final lining.

Story continues below advertisement

The tunnels are anywhere between three-and-a-half to 18 metres below ground.

Tunnel construction for Valley Line Southeast on March 11, 2020.

While most work is below surface, construction has resulted in significant disruption to this small section of the river valley.

“We have requirements in our project agreement that this area be fully restored and returned to park users and all citizens of Edmonton,” said Chris Gentile, the city’s project manager on Valley Line Southeast.

Tunnel construction for Valley Line Southeast on March 11, 2020.

The southbound tunnel is now completely lined with its final concrete finish with the northbound side expected to be done by the end of summer.

Story continues below advertisement

“The testing of trains and getting trains into the tunnel isn’t expected to occur until late this year, and likely into next year,” Lindskoog said.

READ MORE: Mystery emerges, leading to delay in Valley Line LRT construction

Valley Line southeast was initially supposed to start revenue service by Dec. 15, 2020.

Due to delays in bridge construction, which leads to the tunnel, the opening has been pushed to sometime in 2021.

Tunnel construction for Valley Line Southeast on March 11, 2020. Vinesh Pratap/ Global News
Tunnel construction for Valley Line Southeast on March 11, 2020.
Tunnel construction for Valley Line Southeast on March 11, 2020.
Tunnel construction for Valley Line Southeast on March 11, 2020.

Sponsored content