06/23/2026
On June 24, 1912, construction began for the Ontario Paper Mill in City of Thorold.
The Ontario Paper Mill helped shape the Thorold we know today.
From powering local jobs to driving industrial growth along the Welland Canal, the mill played a major role in building our community’s identity. Its connection to the Chicago Tribune, its innovative use of hydroelectric power, and its influence on neighbourhood development made it one of Thorold’s most important historical landmarks. It wasn’t just a workplace — it was a community anchor, a driver of growth, and a symbol of the city’s resilience. For decades, it powered our economy, shaped our neighbourhoods, and connected our city to North America through the Welland Canal. A true cornerstone of our industrial heritage. Its legacy still lives on in our landscape, our stories, and our shared identity.