SERGEANT BLUFFS, Iowa (AP) – More than 3,600 workers are helping construct a $2 billion fertilizer plant being built near Sioux City, and hundreds more workers will be hired soon. The Sioux City Journal reports the workforce at the sprawling CF Industries plant is more than double what the company originally had planned.

Project director Nick DeRoos says the construction peak will be in late October or early November, when more than 4,000 workers will be employed. Work on the three-year project is about half complete and will likely continue into March. Inclement weather and other problems had slowed construction, prompting contractors to increase staffing to meet the targeted completion date.

When finished, the plant will triple the complex’s production of ammonia, which is used in nitrogen-based fertilizer.