I live within a mile or so of the KCS mainline that leads to the newly added yard in Wile, Texas. Because of the close proximity to this strech of trackage, I ride my bike to watch trian operations a lot. I live in Plano, Texas, which is where I watch the trains. There are several side tracks - some for businisses and some for trains to pass each other. Recently I have seen engines that are marked DGNO. If you know anything about this, please respond.