A sink hole that opened up on top of the Evergreen Line tunnel in Port Moody Monday afternoon is being repaired and does not pose a risk to public safety, according to the Ministry of Transportation and Infrastructure.
The hole, which measured about 2 m by 3 m, developed in the Chateau Place parking lot as Evergreen Line crews were changing the cutter head tools on the tunnel boring machine. An air pocket developed as material came into the cutter chamber and, although crews filled part of the air pocket from within the tunnel, part of it made its way to the surface.
The sink hole formed in an area that was fenced off and the public was not at risk, a ministry spokesperson said. It was filled immediately and additional fill was added Tuesday morning.
Nothing else in the area was damaged and the parking lot pavement will be replaced. Crews will also conduct additional surveying until the tunnel boring machine is advanced.
The machine is stopped under the Chateau Place parking lot for maintenance.