Featuring steam locomotives of theUnion Pacific ,Colorado & Southern ,Great Western ,Denver & Rio Grande Western, and theBurlington, all recorded between 1957 and 1962. Until early 1958 this line was serviced by a fleet of modern2-8-4 Berkshire steam locomotives, being one of the last important main line jobs for steam power in the U.S. Anyone who has watched these fine engines in action, as they moved 100 plus cars of freight at a mile a minute or better speed, can attest to the fine job they did.