Fourth annual event for independent grocery retailers builds on last year’s success EDEN PRAIRIE, Minn., 2017-Apr-08 — /EPR Retail News/ — SUPERVALU INC. (NYSE: SVU) today (Apr. 6, 2017) announced plans for its fourth annual National Expo, which will be held July 25-27 at the RiverCentre in St. Paul, Minn. The event will feature a full…