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Service restored after major midday outage in northern Utah

The Rocky Mountain Power website shows impacts of outages on April 9, 2018.

SALT LAKE CITY — A significant power outage left tens of thousands of people without electric service along the Wasatch Front before noon on Monday.

Rocky Mountain Power’s website showed the number of customers impacted by 1 p.m. to be in excess of 57,000. By 1:30 p.m., the number had dropped below 30,000. The utility reported that all service had been restored by 2 p.m.

Rocky Mountain Power later attributed the outage to a circuit breaker that “did not operate correctly” at the company’s Oquirrh substation near 6000 West Old Bingham Highway. In a news release, Rocky Mountain Power said the initial problem grew to affect seven substations in the southwestern portion of the Salt Lake Valley.

The widespread disruption caused delays at some busy intersections for a time, as traffic lights went dark or started flashing.

The Utah Transit Authority also reported service impacts on the Trax red line during the noon hour.

UTA restored full service to the Trax red line shortly before 2 p.m. but warned residual delays might continue for a time.

In Davis County, the South Davis Metro Fire Agency noted several refineries were impacted by the power bump.

The Jordan School District reported on Twitter that the outage had affected several schools, but classes continued as normal.

Rocky Mountain Power said the outage was not a result of tampering or sabotage but an investigation was underway to determine the details.