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Railroads & Locomotives Locomotives Locomotive profile: DDA40X

Locomotive profile: DDA40X

By Angela Cotey | March 16, 2020

| Last updated on November 3, 2020

Original DDA40X is on display in Omaha, Nebraska.

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Original DDA40X is on display in Omaha, Nebraska.

DDA40X

Original DDA40X is on display in Omaha, Nebraska.

Jim Wrinn

DDA40X

•YEARS BUILT: 1969-1971

•MANUFACTURER: EMD

•OPERATED ON: Union Pacific (special order from UP)

•NAME: Centennial, named to mark the 100th anniversary of the Golden Spike ceremony at Promontory Summit, Utah.

•QUANTITY: 47

•HORSEPOWER: 6,600

•KNOWN FOR: The most successful of UP’s twin-engine freight diesels of the 1960s.

•STATUS: Several preserved around the country, and one, No. 6936, operates occasionally as part of UP’s heritage program

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