Tennessee Shortlines: Rail Customers & products

can anyone tell me what customers are served by the following tennessee shortlines and what products they haul out? Caney Fork & Western, Sequatchie Valley, Knoxville & Holston River, South Central Tennessee, Walking Horse & Eastern, and Nashville & Eastern. Also does the Caney Fork & Western still operate the Arnold Engineering Development Center railroad at Tullahoma? I heard that the AEDC track was pretty much not used anymore. Also does anyone know when Watts Bar Lake power plant’s railline was last used? I saw the line this past july and august and it is still in place but has no connection to NS at the moment.