UPDATE: 11:10 a.m.
Fire Chief Carl Anderson reports one farm vehicle was moved out of the area of the fire, but a second would not start and was caught in the fire. He estimates about 150 one-ton bales of hay were burned.
Most of the fire crew left the scene about 5:30 a.m. Friday A team of 3 firefighters and one truck are still on the scene to monitor the fire and its perimeter.
The cause of the fire was believed to be spontaneous combustion. That is caused by a combination of hot afternoon temperatures and moisture in the hay bales.
It is the third stack yard fire that has ignited in Jefferson County this week. There were two reported in the Hamer area.
Firefighters from the Central Fire District’s Ririe and Rigby stations were called to a large haystack fire at around 2:30 a.m. Friday.
Crews were able to contain the fire near 400 North 4500 East, but officials say it is likely to smolder and burn for some time.
Passerby are likely to notice smoke in the area today.