When the iron ore scheme was getting underway, a small iron foundry based in Cobourg, was approached to cast the wheels and frames of wagons to move the Marmora iron ore down to the harbour. James Crossen saw an opportunity to combine his cast-iron products with the abundant local timber to produce railway rolling stock. With the foundry located near both the Cobourg line and train station of the Grand Trunk Railway, which had been built along the shore of Lake Ontario in 1856, it was well placed to expand as Canada's railway network grew. It was later named the Crossen Car Manufacturing Company and went on to become the largest builder of timber-framed rail cars in Canada, making everything from coal and freight wagons through to dining cars and first-class carriages. By 1910 wood was going out of date, when all-steel cars took over, and in 1915 the company, unable to adapt, went into liquidation, and parts of the site reverted to being an iron foundry. A replica of one of the Crossen ore cars was built in 2016 and is on display near Cobourg waterfront.