More than 13,000 Charleston and Mattoon residents temporarily lost power Friday morning.

Leigh Morris of Ameren-CIPS said a 38 kilovolt line in Mattoon had been shut off for bridge repair. Shutting off that line somehow caused another 38 kilovolt wire to “trip up and lock out,” cutting off power.

In Charleston, 7,747 residents lost power at 9:22 a.m. Most of those customers regained power minutes later, with 5,644 regaining service at 9:26 a.m. However, another 2,103 residents did not regain power until 9:55 a.m.

In Mattoon, 5,332 customers were without power from 9:22 to 9:32 a.m. By Friday afternoon, Morris said Ameren-CIPS was still not sure why the wire tripped up and locked out but said the situation did not present the potential for future outages.

“Our first goal is to restore power in a safe manner,” Morris said. “Next is to find out what happened and why.”

The company supplies power to all of Coles County, but only Mattoon and Charleston were impacted, Morris said.