The rails was hot on this unbearable Friday evening as the empty Tennessee Valley Authority coal-bucket NS 73Z (Kingsport,TN-Memphis,TN/BNSF) pace the Tennessee River on it's way northbound on the CSX Chattanooga Sub for Stevenson, AL. At some point probably at dusk the empty train will get back on home rail's on the NS Memphis East-End for Sheffield, AL on it's long trek west to the Powder River Basin in Wyoming.