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A small fire in a rooftop control box generated a lot of smoke and considerable, short-lived angst but little damage in downtown Salt Lake City's Heber Wells Building late Monday morning.

Salt Lake City Department Capt. Mark Bednarik said an automatic fire alarm was triggered about 11 a.m. from the structure, at 160 E. 30 South. Firefighters arrived and evacuated about 100 employees and then discovered the source of the smoke was a small fire — already extinguished by a maintenance worker — in a sixth-floor elevator control unit that had shorted out.

The elevators were shut down pending repair, and by noon crews had ventilated the building and were clearing the scene, Bednarik said.

The maintenance worker was taken to the hospital for treatment of smoke inhalation, but was reported to be in good condition.

No other injuries were reported.

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