Thomasville & Barnesville Railroad The 16-mile line from Thomaston to Barnesville was constructed by the Thomaston and Barnesville Railroad Company, chartered in 1839. After much delay, the line opened in 1856. The company was reorganized as the Upson County Railroad in 1860.   Georgia's Railroad History & Heritage. Copyright, Steve Storey. Railroad History | The Depot List | Locomotives On Display | Odds & Ends | Sources & References | Home