The Big Boy is a 4-8-8-4 standard gauge steam locomotive originally built to burn coal.
The American Locomotive Company's (ALCO) Schenectady Shops built an initial order of 20 Big Boy Steam locomotives delivered in 1941 and a second order of 5 Big Boy Steam Locomotives were delivered in 1944.
Out of the 25 total Big Boy locomotives, 8 survive today in preservation.
1. - Holiday Park | Cheyenne, Wyoming.
Big Boy Steam Engine #4004
2. - Forney Transportation Museum | Denver, Colorado.
Big Boy Steam Locomotive #4005
3. - National Museum of Transportation | St. Louis, Missouri.
Big Boy Steam Train #4006
Union Pacific Big Boy #4012
*Note - #4012 is currently not on public display during a cosmetic restoration.
Big Boy Locomotive #4017
6. - Museum of the American Railroad | Frisco, Texas.
Big Boy Engine #4018
Big Boy Train #4023 - the only surviving Big Boy from the 1944 order of locomotives.
Union Pacific Big Boy #4014
This is an active steam locomotive shop because the #4014 is a fully operational Big Boy locomotive that is part of the Union Pacific Steam roster. The #4014 is only available for public viewing during special events.
The #4014 has been converted to burn oil.
For more photos and information on #4014 click here ---> UP Steam