This line started as part of the Detroit, Toledo & Ironton's main line between Detroit, MI and Ironton, OH, and was eventually purchased by PRR and merged into Penn Central. Ownership of the DT&I lasted until 1970, when the bankrupt Penn Central sold the line to private investors to pay off creditors. The Grand Trunk Western Railroad ultimately became the owner of the line in 1980, and abandoned this segment in 1982.
See also Washington Court House to Jackson.
Thanks to Aaron M. for contributing information about this route.