Updated: 02/14/2014 12:05 PM
Created: 02/14/2014 3:19 AM WHEC.com
Investigators say the fire at a concrete plant was accidental and was caused while workers were heating a chemical to help keep it at a certain temperature in the cold weather.
Fire officials say a snowplow driver saw smoke coming from Manitou Concrete around 2:20 a.m. The plant is part of a multi-story building just east of the 390 ramp.
We're told crews had a tough time putting out the flames because the hydrants were frozen. They were also concerned about a chemical runoff near the building but we're told that chemical is not dangerous to the public.