Baltimore & Ohio Railroad No. 4559 was a class Q-3 2-8-2 'Mikado' type steam locomotive, built by the Baldwin Locomotive Works in 1918. Following America's entry into WWI, the USRA nationalized the nation's railroad system in the interest of ensuring the most efficient operations possible.
The original No. 4559 was scrapped. However, Toledo, Angola & Western No. 100 was dressed up as No. 4559 for a short time, however it was repainted as Elk River Coal & Lumber No. 10 in Heritage Village, Huntington, West Virginia.