|The Carmel Monon Depot is eligible for the National Register under Criterion A The building is an example of a latenineteenth century, small-town railroad depot. The depot was, and remains, the most tangible place associated with the rail era of Carmel. As the second-oldest depot in Hamilton County, the structure is in an area that saw increased population and economic activity related to railroad expansion. It is one of less than 250 surviving rail depots in Indiana and is the oldest surviving depot used by the Monon Railroad's Monon-Indianapolis section of the Indianapolis-Chicago Airline, a major Indiana rail line connecting central Indiana to Chicago. The period of significance extends from its construction date, 1883, through 1961, the arbitrary National Register cut-off date.