MainSource Bank, headquartered in Greensburg, has signed on as the title sponsor of the 2016 Madison Regatta, which will take place July 1-3 in Madison, Indiana. In its first year sponsoring the event, MainSource will join returning presenting sponsor, Belterra Casino Resort in supporting the Regatta, which is the oldest race site on the H1 Unlimited Racing series circuit. The 2016 event will be titled MainSource Bank Indiana Governor’s Cup Madison Regatta presented by Belterra Casino Resort.