A New Mexico Rail Runner MotivePower MP36PH-3C in New Mexico.

(By snowpeak - https://www.flickr.com/photos/snowpeak/3597678413/, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=7612590)


MotivePower logo.


MotivePower, Inc. (MPI) is an American manufacturer of diesel-electric locomotives. The company is a wholly-owned subsidiary of Wabtec, and traces its history back to the MK Rail division of Morrison-Knudsen.



Main articles: MK Rail and Wabtec

Morrison-Knudsen established a separate rail division, MK Rail, in 1972. Morrison-Knudsen spun-off the division in 1993; it became a publicly traded company in 1994. After Morrison-Knudsen's bankruptcy in 1996, MK Rail renamed itself MotivePower Industries, doing business as Boise Locomotive. The company merged with Westinghouse Air Brake Company in November 1999 to form the Wabtec. Wabtec renamed the Boise Locomotive division to MotivePower in 2000. MotivePower continues as a wholly owned subsidiary of Wabtec. On September 18, 2019 several months following Wabtec's merger with GE Transportation, Wabtec announced the MotivePower Boise plant will close in early 2020 and production shifted to Wabtec's legacy GE Transportation plant in Erie, Pennsylvania.



MotivePower's flagship product is the MPI MPXpress passenger locomotive. Over two hundred locomotives have been built for commuter rail operators in the United States and Canada.


MPEX Switcher MP14B

MPEX Switcher MP20B

MPEX Switcher MP20C

MPEX Switcher MP21B


MP8AC-3 (R156)

CBH class (MP27CN, MP33CN, & MP33C)



Completed at the Wabtec Erie shop in Erie, Pennsylvania, MotivePower also does overhaul work for several agencies throughout the US. These include:

New Mexico Rail Runner Express
Norfolk Southern
MBTA Commuter Rail
Union Pacific


MotivePower, Inc. Overview

Industry: Railroad
Founded: November 1999
Headquarters: Boise, Idaho
Parent: Wabtec
Website: www.wabtec.com/business-units/motivepower