Chatham County residents will soon have one-stop shopping convenience for their grocery and general merchandise needs when a new Walmart Supercenter opens Wednesday, June 12, at 12500 U.S. 15 501 Highway N. in Chapel Hill. The approximately 148,000-square-foot store will be open 24 hours a day, seven days a week. Doors will open following a brief ribbon-cutting ceremony at 7 a.m.