0.8% of those age 65 or over. Economy When Ball Ground was first established, a large portion of its economy was based on agriculture and the railroad that passed through town, which brought marble from Tate, Georgia to be processed and finished by marble companies in Ball Ground. In the early 1900s the city built up a ginery, saw mill, and a marble mill to mine the marble that was abundant in the area. Beginning in 1898 with the opening of the first marble company in the city, the marble industry became a large part of early Ball Ground's economy and in the 1920s the city had four independent marble finishing mills. The marble industry and other agricultural industrial facilities had largely died down or relocated out of Ball Ground by 1959. Several companies operated plants in Ball Ground before later relocating. The Coca-Cola Company opened a bottling plant in Ball Ground in 1903 which operated for 30 years, closing in 1933. Tyson Foods operated a feed mill in Ball Ground from 1965 to 1998, when it moved to a larger facility in Bartow County. The city has an industrial area called the River Mill Industrial Park, which is a area with railroad access. In May 2015, Universal Alloy Corporation (UAC) announced it was building a new factory in Ball Ground to supply Boeing with parts for aircraft wing assemblies. Universal Alloy (UAC) is one of the largest employers in Cherokee County. UAC completed their Ball Ground facility in 2017. UAC is one of Cherokee County's largest employers, with over 500 employees. Arts and culture The Sequoyah Regional Library System has a branch in Ball Ground called the Ball Ground Library, a facility with approximately 30,000 books in its collection. In 1985, the Alfred W. Roberts House was listed on the National Register of Historic Places. It is the only house in Cherokee County that has this recognition. In 2009, the Ball Ground Historic District was listed on the NRHP, for its significance to Native American and early national history. Many homes still present in Ball Ground were built during the 1880s–1920s and are regarded as historic. In 2010, following the State of Georgia passing a law allowing for city governments to establish historic commissions to handle historic preservation efforts within their cities, Ball Ground's city government passed an ordinance establishing an historic preservation commission to encourage historic preservation efforts