Milwaukee Subdivision (Milwaukee-Horicon)
Cambria Subdivision (Horicon-Cambria-Portage)
Oshkosh Subdivision (Horicon-Oshkosh)
Markesan Subdivision (Brandon-Markesan)
Mayville Spur (Iron Ridge-Mayville-Fond Du Lac)
Plymouth Subdivision (Saukville-Kiel)
Kohler Spur (Kohler Jct.-Plymouth)
Fox Lake Subdivision (Fox Lake-Janesville)
Elkhorn Subdivision (Elkhorn-Bardwell-Clinton Jct.)
Monroe Subdivision (Janesville-Monroe-Mineral Point)
Madison Subdivision (Janesville-Madison)
Prairie Subdivision (Madison-Prairie Du Chien-Marquette)
Sauk Subdivision (Mazomanie-Prairie Du Sac)
Waukesha Subdivision (Waukesha-Madison)
Watertown Subdivision (Watertown-Madison)
Cottage Grove Subdivision (Cottage Grove-Madison)
Reedsburg Subdivision (Evansville-Reedsburg-Elroy)
Main Line (Green Bay-Channing)
Menominee Branch (Crivitz-Marinette)
Oconto Falls Branch (Oconto Falls-Stiles Jct.)