Stop work order in place for Valley Line LRT site due to safety concerns

A stop work order is in place forEdmonton's Valley Line LRT project due to safety concerns.

The order has been in place since Dec. 4 and means notunneling work can be done in the 95thStreet area, in the riverbank around GriersonHill.

The orderwas put in place during a spot checkbyOccupational Health and Safety officers.

Alberta Labour spokesman Trent Bancarzsaidone problem is that there's only one way in and out of the tunnel under construction, and there isn't a "practical way" to provide a second exit.

Extra measures need to be put in place to ensure workersafety in the event of a fire or a tunnel collapse, saidBancarz.

"There has to be some safety standards in place for the workers in case of an emergency," he said.

"Those things were lacking when we inspected the site so that's why a stop work order was put in place. Until the conditions and the order are complied with, the order will stay in place."

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Bancarzsaid a solution to the issue could be to create what's known as a safe area, a secure spot where workers can take shelter in case of an emergency.

"There may be things like ensuring that there's air supply down there in case of a cave in where it may take a while to rescue people and dig them out," he said."They need to be able to breathe for a certain amount of time."

Crews have dug 300 metres already

The stop work order took DeanHeumanby surprise.

Heuman is the stakeholder relations manager forTransEd, the company constructing the line. He said he understands the stop work order, but the company already has manysafety procedures in place from "some of the leading tunnellers around the world."

"We're using their standards, including fire suppression, external breathers that people could be using, lots of fresh air intake, extra fire extinguishers, all kinds of things," he said. "We felt we were doing some of the leading things that can be done in tunnelling in order to make it safe for the workers, first and foremost.

"We're looking at ways to find something that will work and that will satisfy their concerns, as well as allow us to continue to dig."

We're looking at ways to find something that will work and that will satisfy their concerns as well as allow us to continue to dig.- Dean Heuman, TransEd

Thetunnel is being dug slowly to prevent any cave-ins, and all crews are training on working in confined spaces,he said.

The tunnel starts on 102nd Avenue and curves along 95th Street to the riverbank at Louise McKinney Park. It'sabout six-and-a-half metres by six-and-a-half metres and there's machinery inside the tunnel, he said. Workers are more than three-quarters of the way through digging the 400-metre tunnel, he said.

The stop work order so far has had no impact on the timeline of the project because crews were working ahead of schedule before the order, Heuman said.The LRT line is set to open in December 2020.

City of Edmonton spokesman Quinn Nicholson said he is confident that TransEd will be able to resolve any issues so OHS can lift the stop work order, and is pleased to hear the company does not believe this will lead to any delays.

He said the city is getting updates from the company on its progress.

The Valley Line LRTis a$1.8-billion project.