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SALT LAKE CITY — Power has been restored to thousands of customers in Salt Lake County who lost service for a time, due to an outage on Friday.

Rocky Mounfain Power said around 20,000 people temporarily were without service early Friday afternoon, due to the loss of a substation.

According to a Rocky Mountain Power outage map , the issue mostly impacted residents in Holladay and Millcreek.

By 4 p.m., the power company said service had been restored to the impacted customers.

The company did not indicate what led to the substation's failure. ×

Utah Salt Lake County Curtis Booker is a reporter for KSL.com.

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