Thousands of Eugene residents experienced power outages Monday morning, but it has since been resolved, according to the Eugene Water & Electric Board.

The outages affected roughly 4,500 EWEB customers, according to EWEB communications specialist Aaron Orlowski. The outages were primarily in the south Eugene Hills and College Hill neighborhood, and happened at 11:16 a.m., according to the EWEB outage map.

It happened when an EWEB crew was performing relay testing at the Monroe substation, when the testing inadvertently tripped the station offline, Orlowski said. Power was restored at around 11:30, he said, noting that it often takes a few minutes for the outage map to update once everything is fixed.

The testing is meant to ensure that the equipment is functioning correctly to protect the system, and occasionally those errors happen, Orlowski said. The equipment was not damaged and is functioning correctly now, he added.

"We’re grateful to EWEB’s customers as they sat through this quick 15-minute outage," Orlowski said.