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Union Pacific #4014
  • ​BUILD DATE: 1941
  • MANUFACTURER: ALCO Schenectady Shops
  • BUILDERS NUMBER: 69585
  • CONFIGURATION: 4-8-8-4 "BIG BOY" 
  • LOCOMOTIVE WEIGHT: 762,000 LBS. 
  • DRIVER SIZE: 68"
  • VALVE GEAR: WALSCHAERTS 
  • TRACTIVE EFFORT: 138,240 LBF
  • BOILER PRESSURE: 300 PSI
  • FUEL: No. 5 OIL
  • DELIVERED NEW TO: UNION PACIFIC RAILROAD
  • ROAD NUMBERS CARRIED: UNION PACIFIC #4014
  • ​CURRENT OWNER: UNION PACIFIC RAILROAD 
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Union Pacific "Big Boy" Steam Locomotive #4014
Union Pacific Big Boy #4014 is the largest and most powerful operational steam locomotive in the United States. 
#4014 was delivered new to the Union Pacific in 1941 as a coal burning locomotive.  
#4014 was retired from revenue service in 1961.
#4014 was on display at the Rail Giants Museum in Pomona, California from 1961 - 2013. 
#4014 was completely rebuilt, including conversion to burn fuel oil by the Union Pacific Steam Shop in Cheyenne, Wyoming. 

For more information ---> www.up.com/heritage/steam/


In 2019 I was able to ride behind the Union Pacific Big Boy from Omaha, Nebraska to Boone, Iowa.
​I was also able to chase and photograph the #4014 from Boone, Iowa to Mason City, Iowa. 

UNION PACIFIC #844
  • BUILD DATE: 1944
  • MANUFACTURER: ALCO Schenectady Shops
  • BUILDERS NUMBER: 72791
  • CONFIGURATION: 4-8-4 "NORTHERN"
  • LOCOMOTIVE WEIGHT: 486,340 LBS.
  • DRIVER SIZE: 80"
  • VALVE GEAR: WALSCHAERTS
  • TRACTIVE EFFORT: 63,750 LBF
  • BOILER PRESSURE: 300 PSI
  • FUEL: No. 5 OIL
  • DELIVERED NEW TO: UNION PACIFIC RAILROAD
  • ROAD NUMBERS CARRIED: UNION PACIFIC #844
                                               UNION PACIFIC #8444
  • ​CURRENT OWNER: UNION PACIFIC RAILROAD 
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Union Pacific Steam Locomotive #844
#844 was the last steam locomotive to be delivered to the Union Pacific Railroad. 
#844 was delivered new to the Union Pacific Railroad in 1944 as a coal burning steam locomotive. 
#844 was converted to burn fuel oil in 1945. 
#844 has never been retired from the Union Pacific Railroad Roster. 
#844 was renumbered #8444 from 1962 through 1989. 
#844 is the 3rd Largest operational steam locomotive in the United States. 

For more information ---> www.up.com/heritage/steam/

​In 2011 I was able to chase the #844 from Bald Knob, Arkansas to Little Rock, A
In 2011 & 2012 I was able to ride behind the Union Pacific #844 as part of the Denver Post "Frontier Days" Specials that operated from Denver, Colorado to Cheyenne Wyoming. 

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