The fire broke out at 175 Sample Flats Road just before 9:30 p.m.
The first units from Corry arrived to find light smoke pouring from the eaves of the sprawling two story metal structure.
The business is a lumber manufacturing facility, and a sawmill. It had been Thompson’s Maple Products. Information now shows it as Larix Inc.
The fire chief on the scene said the blaze began in a break room.
Firefighters were concerned about sawdust spreading the fire. They said a sprinkler system made a big difference.
At the height of the fire 40 firefighters were on the scene.