UPDATE – Main Line – Menominee River to Ontonagon A new photograph and additional information about the Ontonagon depot has been added to the Main Line – Menominee River to Ontonagon page. A DSS&A train poses in front of the CM&StP, or MILW, Ontonagon, Mich., depot ca. the turn of the 20th Century. Photograph courtesy of the Roy Drier Collection - Michigan Technological University Archives and Copper Country Historical Collections. You Might Also Like UPDATE – Main Line – Schwartzburg to Hilbert February 14, 2022 UPDATE – Reminders of the Main Line – Fort Howard to the Menominee River May 16, 2022 NEW – Reminders of the Menasha Branch – High Cliff Spur January 9, 2022