Crews are responding Sunday to a large fire at the site of the historic Windsor Mill.

Just before 2 a.m. Sunday, Windsor-Severance Fire Rescue received a report of a commercial fire at 214 Main Street. The structure was "fully involved" when crews arrived on scene, according to WSFR spokesperson Todd Vess.

“This will go down as one of the largest fires in this town’s history,” he said. “[The mill] went up like a matchstick.”

According to WSFR, crews will be working on scene for most of Sunday, and Main Street will be closed for an undetermined amount of time.

The grain mill was Windsor- an iconic symbol built in 1899 to store the town’s food supply. Over the years it acted as a pillar in the small Weld County town until the 1990’s when it was decommissioned. In 2008 the mill was damaged by an EF-3 tornado that ripped through the town, one of Colorado’s worst tornadoes in history.

Earlier this year city council members approved reconstruction of the mill to turn it into a brewery and restaurant. Eight months of work had gone into the project until Sunday’s fire.

“It’s really a sad day for Windsor,” said councilman Paul Rennemeyer. “I want to cry. Windsor has been my home for over ten years and I can’t imagine actually not having this iconic landmark in our town.”

Firefighters say within two minutes the fire went from substantial to fully involved as old wood provided heavy fuel while the new timber acted as a quick ignition source.

“It’s so heartbreaking because it’s something that my community holds dear to us and it’s a huge symbol,” Addi Bowman said. “It’s just sad to see it go.”

There were no injuries in the fire but firefighters are still looking into a cause.

Federal agents are getting to Windsor on Tuesday to help in that process.