Cairo The Atlantic Coast Line depot in Cairo was built in 1905. It is now the local police station. This photo by Tom Solomon, dating from around 1968 to 1975, shows the depot before the loading dock, semaphore signals, and chimneys were removed. (Tom Solomon Photographs, Dothan Landmarks Foundation, Inc. Records, RG030. Archives of Wiregrass History and Culture, Troy University Dothan Campus, Dothan, AL.) Cairo, the county seat of Grady County, is a city of 9,231 in southwest Georgia.   Georgia's Railroad History & Heritage. Copyright, Steve Storey. Railroad History | The Depot List | Locomotives On Display | Odds & Ends | Sources & References | Home