MANKATO (August 20, 2012) – Mankato-based Ag Star Financial Service will dedicate the newest building on the State Fairgrounds this Thursday. Ag Star is the lead sponsor of the 27,000 square foot Ag Star Arena. It will serve as the home of the fair’s equine and livestock activity. It will replace the fair’s 1960-era Judging Arena and Horse Annex. Its first fair use will be the 4-H cow and calf show.