A little more information her:
[url]http://cs.trains.com/trn/f/111/t/226370.aspx[.url]
near the bottom. All of the online pictures I can find show the unrebuilt 972554, which looks like a "standard" rotary plow.
If I remember right Union Pacific had self-powered diesel electric rotaries in the 70s, so the idea isn't new, but theirs looked more like standard rotaries, not like a locomotive with a plow in the front. This one looks strange...
