The 600,000sq ft plant will be built on the 245-acre site on an industrial estate in the city, and will employ 1,100 people. It is a joint venture between Kansas-based Seaboard Foods and Missouri-based Triumph Foods. The plant is expected to open in 2017.
Preliminary approval was given by the council in May, but local law required the site was first publicly advertised for 30 days before the $5.4m sale could go ahead.
Seaboard Foods president and CEO Terry Holton said the company was currently recruiting managers. The plant will have a capacity to slaughter between 10,000 and 12,000 pigs a day.