DACONO, Colo. -- It took fire crews nearly two hours to put out a fire at an oil storage facility on Saturday afternoon near Dacono.

Mountain View Fire Department needed six fire engines in order to put out the oil fire. The fire was reported at about 1:15 p.m. at the oil production facility in a field near Interstate 25 and State Highway 52. A thick plume of blue-black smoke was seen throughout Weld and Boulder counties.

Jesse Hodgson of Mountain View Fire said the cause of the fire was an electric motor that separates water from oil pumped from the ground at a nearby oil pad. Hodgson said the motor might have overheated and sparked the fire. Two out of five storage tanks caught on fire.

Hodgson said fighting an oil fire is different than a fire the fire department might find at a building. Instead of using water to extinguish the blaze, crews used a special foam.

"The foam smothers the flames," Hodgson said.

The oil pad and storage area are owned by Kerr-McGee Corporation, an oil company based out of Texas.