20th Century Freight Locomotives
 
Union Pacific "Big Boy" frieight locomotive built in 1941
by the American Locomotive Company.
7,000 horsepower; 1.2 million pounds; maximum speed of 80 mph.
[NPS photo]
 
Click here to see a great photo of a Union Pacific 4004.
   
 

Site Coordinator: Lori Niemuth Last updated: December 27, 2007