RI 4700

This loco was built in 4/1970 with EMD serial number 36386. She was built as a freight roadswitcher, model GP40.

She became UP 631 in the early 1980's when UP obtained a group of GP40 units from the defunct Rock Island.

She became MP 631 in the mid 1980's when UP re-assigned some ex Rock Island GP40's to the MP in yellow paint with MISSOURI PACIFIC lettering.

MP 631:

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