ɪn wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈɪfti θɹˈiː, ðə kəlˈʌmbəs ænd zˈiːniɚ ɹˈeɪlɹoʊd ænd ðə lˈɪɾəl maɪˈæmi ɹˈeɪlɹoʊd ˈɛntɚd ˌɪntʊ ɐ kˈɑːntɹækt tʊ ˈɑːpɚɹˌeɪt æz wˈʌn lˈaɪn.
In 1853, the Columbus and Xenia Railroad and the Little Miami Railroad entered into a contract to operate as one line.