The Canal Saint-Georges is an anthropogenic waterway on Anticosti Island (Québec, Canada). It was built in 1898, shortly after Henri Menier purchased the island. Since then, it has been adapted for various uses. From the late 1970s onwards, fluvial processes gradually shaped the watercourse, resulting in a more natural morphology. In addition, a fish habitat revitalization project conducted between 2019 and 2022, led to the removal of a dam, stabilization of the banks and creation of wildlife habitat. This article presents the historical anthropogenic and natural trajectories of the canal to highlight their interactions. The evolution of the use of the canal comprises 3 distinct periods, each of which influenced the fluvial processes and the resulting morphology. This combination of anthropogenic and natural evolution is typical of many managed waterways, representing both opportunities and management challenges. The case of the Canal Saint-Georges demonstrates the importance of considering the hybrid nature of such waterways when managing or restoring them. In the future, these considerations could lead to a better respect of their potential functioning as well as to a better enhancement of their cultural heritage.