The engine was design to haul passenger trains for the Central Pacific Railroad including to help building the First Transcontinental Railroad.
Sadly, the historical significance of this locomotive was not realized until decades after its scrapping in the early 1900s; however, by then, the Leviathan had been unrecognizably altered.
In 2009, a replica was made; the replica remains operational today but only operates on special occasions and is also used for tourist excursions of any kind.
- The Leviathan is the only Central Pacific locomotive that lives in the state of Illinois.
- The replica of the engine was own and design by David H. Kloke of Kloke Locomotive Works of Elgin, Illinois.
- The locomotive used to be America's newest operating steam locomotive, but has lost the title to the York 17, another replica built by David Kloke in 2013.
- The Leviathan and the Jupiter are both operating 4-4-0s from the Central Pacific Railroad, They are also Replicas, and she's also the Jupiter's sister.
- In 2012 the engine did a doubleheader with Lehigh Valley Coal Co. #126 at the Illinois Railway Museum.
- The locomotive did a doubleheader with Little River Railroad No. 110 at Train Expo 2014.
- The locomotive was originally designed to burn wood, which was the reason for it's distinctive funnel which contained a spark arrestor.
- The locomotive was originally use freight service besides hauling passengers.
- On July of 2009 The Leviathan made its first public appearance at "America's Largest Celebration of Railroading" in Owosso, MI.
- In August of 2011 it sits on display at the Illinois Railway Museum during the Day Out With Thomas event.
- The Leviathan made multiple visits around the Midwest and eastern parts of the United States.
- In June of 2015 the engine was at the Galesburg Railroad Museum for Railroad Days and David Kloke was an engineer of The Leviathan.
- In the Thomas & Friends movie, Big World! Big Adventures!, this engine looks very similar to the character Beau.
- In 2014 the locomotive was at Train Expo 2014.
- In 2011 the locomotive was at the Rock Island Train Festival.
- From 2011-2013, it operated at the Illinois Railway Museum.