740 is the HESR Saginaw Local. It switches Saginaw area customers. It usually, but not always, originates in Bay City. On busy days it might take two crews to handle all it's work. On slow days it might be annulled.
800 is the Reese to Saginaw and back to Reese job. It interchanges with LSRC and HESR both in Saginaw. It also switches Reese area customers. It might keep the same number when it works north of Reese to Elkton.
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