Crossing the GTR main line, the Coteau and Province Line Railway and Bridge Company (C&PL) ran southeast, bridging the St. Lawrence River to reach Valleyfield where it crossed the original Beauharnois Canal at a lock, thence across southwestern Quebec to Cantic and then crossing the northern end of Lake Champlain between Alburgh and Swanton where it ended at a connection with the Central Vermont Railway (CVR).
The Coteau and Province Line Railway and Bridge Company (C&PL) ran southeast, crossing the St. Lawrence River to reach Valleyfield where it crossed the original Beauharnois Canal at a lock, then across southwestern Quebec to Cantic and finally crossing the northern end of Lake Champlain between Alburgh and Swanton before connecting with the Central Vermont Railway (CVR).