Saginaw Subdivision

[1] Before CSX Transportation operated trains on the Saginaw Subdivision, it was originally owned by the Pere Marquette Railway.

The Flint and Holly Railroad was built by businessman, and later Michigan Governor, Henry H. Crapo in the 1860s to serve his lumber mill.

A park near the junction of Canadian National Railway's Holly Subdivision (a branch line of the old Grand Trunk Western Railroad), is named for him and a Michigan Historical Marker about him and the railroad's section stands there.

In Carleton, the Conrail Lincoln Secondary branches off and the Canadian National Railway's Flat Rock Subdivision crosses.

Lake State Railway began leasing the line from Plymouth to Mount Morris starting in early March 2019.

[4] As with most lines in the Detroit, Michigan, metropolitan area, automobiles are the main source of revenue on the Saginaw Subdivision, although other freight is important for the businesses too.

Once a month, a BNSF Railway contracted Powder River Basin coal train works its way up the line.