Cline Group LLC's Kameron Collieries ULC laid off 18 workers at the underground Donkin coal mine in Nova Scotia following a recent roof collapse incident at the site.
Operation at the mine were suspended after the roof collapse during the 2018 holiday break. The mine has suffered six such incidents in the last six months, according to the report.
Donkin reopened in February 2017 after 15 years, aiming to extract metallurgical coal from an undersea deposit.
Mine Vice President Shannon Campbell said in an email that the company recalled all but 18 of Donkin's 128-strong workforce after Christmas "to perform routine maintenance, upkeep the mine and surface facilities and install additional ground support."
Campbell told CBS earlier that the operation had "experienced certain adverse geological conditions beyond our control" during the scheduled holiday break in late December 2018. No injuries were reported in the incident.
"We continue to work closely with the Department of Labour and Advanced Education, but do not have a timeline yet as to when the mine will reopen," the executive noted.
Nova Scotia said the operations that the mine reopening is subject to approval of a new ground control plan by the Department of Labour. Meanwhile, Labour Minister Labi Kousoulis expressed concerns about the roof collapse.
The United Mine Workers of America plans to organize the miners over the layoffs, expressing concerns that the shutdown may also be affecting workers other than miners. Workers at the Donkin are not unionized.