The northern division operates a line running northeast and east from Carthage to
Newton Falls. The line fell into disuse after the closure of a paper mill in
Newton Falls in 2000. From 2023 to 2025, a number of projects funded by the New York State Department of Transportation and the St. Lawrence County Industrial Development Agency were undertaken to rehabilitate the line. The first revenue train in 25 years operated from Carthage to Benson Mines on November 7, 2025. The northern division also operated the West Carthage to
Lowville segment, which was abandoned on January 14, 2025 after years of disuse. The Black River crossing's approaches were removed in recent years cutting it off from the rail network. The Lowville-to-Carthage branch line had only seen occasional revenue car storage on its northernmost portion since the LB&R was taken out of service in 2007. This is in addition to the abandonment of fellow GVT subsidiary, the
Lowville and Beaver River Railroad which also filed for abandonment on January 14, 2025. GVT entered into an agreement with Lewis County in November 2025 for both lines within Lewis County to be purchased for use as recreational rail trails. ==References==