Last month, one of Virginia’s largest producers of flour and cornmeal announced they would be closing their business. Big Spring Mill has been in operation along the Roanoke River between Christiansburg and Roanoke since 1850. Meanwhile, another mill in nearby Floyd County is stepping up its production.22-year-old Theodore Testa sifts his hand through yellow and orange speckled grits that he helped grind at Gracious Day Grains mill. ‘These are the product that we sell the most of, and we’re very proud of this.