From Richard Crabtree on Frisco Rails Across Missouri; Here we are at the Frisco Depot in Allenton, Missouri aka Eureka Missouri around 1900. The village of Eureka Missouri was platted in 1858 along the route of the Pacific Railroad ~ aka Frisco. According to the Eureka Chamber of Commerce, railroad workers while clearing the way for the track and the next railroad camp saw Eureka, level land with little to clear, and declared, "Eureka!" Greek meaning "I have found it." Thus, Eureka was founded. The railroad town of Allenton, Missouri is a former community on u.s. route 66 located (now) at the junction of interstate 44 and business loop 44 in western St. Louis County. In 1985, it was annexed by the city of Eureka, Missouri.