SUMMER BRIDGES, WINTER BRIDGES, COVERED BRIDGES
The railway changed much of the valley’s history, as did the paddle-steamers on the Ottawa River. Bridges and dams came next. Until bridges spanned the rivers, the only way to cross was by scow, and only in summer. Just as the steam-operated vessels which plied the Ottawa River between the mid-1830s and the mid-1940s could only operate in summer, so the ferries crossing larger and smaller rivers in the region were also entirely dependent on the season.