Ben, are you referring to the track in front of the old Boeing Headquarters building ??? If so, I'll go have a look - see for myself. I do know the last mile or so, South of Jorgenson Forge, has been pulled up or isolated for a few years now. Don't know if the CWR was / is related to the resurfacing & tie replacement EwePee did on this line last year. Some of the spurs were in very bad condition, as was the run - around at St. Gobain Glass ( or whatever it is called this week. ). This industrial line has quite a bit of traffic, including covered hoppers of glass sand and plastic pellets, and scrap in gondolas. Also tank cars and box cars along Fox Avenue.
Did you see the Espee Bay Window CABOOSE in Argo Yard ??? It is used for shove moves on the Marginal Way line, and lives at South End Argo by Airport Way Viaduct otherwise; an easy photo from the bridge.