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Inspired by his animators Ward Kimball and Ollie Johnston who had backyard railroads, Walt launched construction of a 1/8 scale live steam locomotive, rolling stock such as gondolas and a caboose, track and a small barn modeled in miniature for the one in Marceline, Missouri from his youth to keep them in.
This engine operated for a few years in Walt's backyard railroad, and when it was shut down, the 173 model was displayed in Disneyland's Main Street station for nearly fifty years, before moving to a new museum dedicated to Disney's legacy.