A fire at the Burnett Dairy Cooperative erupted on Monday night when eight crews were called to maintain the fire. The first calls for the fire began around 10:30 p.m.
Crews were still battling the flames Tuesday morning and State Road 70 remained closed to traffic from County Road Y to County Road M.
There were no reported injuries from the fire. Initial reports suggest the fire was started after a mechanical malfunction at the dairy.
Grantsburg, Siren, Webster and St. Croix Hertel Fire Departments were on the scene along with Frederic, Cushing, Pine City and Rush City.
On the scanner fire crews said they were able to enter the building around 1 a.m. and Tuesday morning the fire was still going but was under control.
Burnett Dairy Cooperative is a farmer-owned cooperative based near Grantsburg. Founded in 1896, it is one of the few remaining full-service cooperatives producing cheese today.