Welcome to MAC. It is the goal of every MAC employee to make customer service a leading priority. We understand that outstanding service is a foundation of good business. We will never take any business for granted and will continue to earn your trust every day. Services Include: Grain Merchandising Services. Our Facility: 5,190,000 bushels of storage capacity for Corn, Soybeans, and Wheat. Direct rail access: NS Adrian, CSX/CN Riga. Annual supporter of 4-H youth auctions at local county fairs.