LONGMONT — South Main Station, the mixed-use apartment and retail business project set to go on the former site of the Butterball turkey plant in Longmont, has hit a few snags.

Brian Bair, who represents both the property owner and Niwot-based developer 150 Main St., told the Longmont City Council on Tuesday that the project will be delayed four to six months.

Bair and city staff will bring back a formal resolution to adjust some of the developer’s deadlines for the council to consider at the Dec. 1 City Council meeting.

Phase one of South Main Station would include 314 high-end apartment units spread out over five buildings. The first floor facing Main would be used for 9,300 square feet of commercial space.

Bair said when crews demolished the Butterball building, they found two “subterranean surprises.” Crews discovered concrete columns that were buried 20 to 30 feet into the ground below the building and fill dirt from the original construction that contained coal ash, which can have levels of arsenic, and had to be removed.