A GP38-2 (now designated as a GP38N after a rebuilt by UP) and an SD40-2 sit together near the yard office in North Yard. These two units are idle at the moment, but when needed, they'll be used as switcher in the yard. It is pretty easy to trace the heritage of UP 737 by virtue of the fact that it has no dynamic brakes. With very few exception, nearly any unit without dynamic brakes is of Missouri Pacific heritage. MoPac ordered many units that had no dynamic brakes as MoPac ran in (relatively) flat lands.
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