The 12-acre fire that started burning at a recycling center Sunday was contained before Monday, but it continued to smolder and pour smoke into the Treasure Valley until Tuesday night, according to the Boise Fire Department.
The fire at Diamond Street Recycling, 5800 W. Diamond St. near the Boise Airport, burned about 20 feet deep into a pit holding debris. Crews stayed on scene day and night to douse the blaze.
The fire was extinguished and firefighters left the area at 8:30 p.m. Tuesday, according to BFD.
The smoke from the fire caused the Department of Environmental Quality to issue an orange, or moderate, air alert for the Treasure Valley. At that level, air is unhealthy to sensitive people like the very young, elderly and those with respiratory health issues.
The cause of the fire remains undetermined, but the damage at the recycling center could cost more than $100,000. The fire burned a wood chipper, shed and a semi-truck trailer.