Work has resumed on the Trans Mountain Pipeline expansion after a planned two-week pause stretched into a 52-day safety procedure overhaul on the 1,150-kilometer (690-mile) oil conduit across Alberta and British Columbia.

Trans Mountain

“A staged remobilization of the 7,000-strong workforce will begin this week,” the Canadian government-owned pipeline said earlier this month. “The restart process will begin with safety retraining and reorientation of all supervisors and workers before construction resumes.

Trans Mountain’s enhanced safety measures include workplace inspections and audits, incident and near-miss reports, communications, supervision, hazardous site planning, duty fitness assessments, alcohol and drug testing, and Covid-19 virus screening.

The construction suspension...