Booth's sawmill operations could never run at full capacity because the output could not be carried out of the lumber yards fast enough. Because of these transportation problems in the Ottawa area, Booth became an important participant in the development of Canada's railway system when he purchased the Montreal and City of Ottawa Junction Railway (M&OJ) and the Coteau and Province Line Railway and Bridge Company (C&PL) in 1879, amalgamating them to form the Canada Atlantic Railway. The M&OJ had received a charter to build southeast from Ottawa to Coteau Landing on the north bank of the St. Lawrence River. The C&PL had received a charter to build a bridge across the St. Lawrence River to Valleyfield, Quebec and then operate a railway across southwestern Quebec to the United States border. Due to financial difficulties, neither line had been completed, and Booth worked to complete the entire route by 1882. The Coteau bridge was completed in 1890, thus eliminating the necessity of transshipping cargo by barge. The CAR formed a subsidiary, the Vermont and Province Line Railroad, which would build a line to Swanton, Vermont on the eastern shore of Lake Champlain in 1897, thus connecting Ottawa to the United States via the Delaware and Hudson Railway, the Rutland Railroad, and the Central Vermont Railway.