Important reminder: In the event of a flood, contact your municipality. They will advise the Ministère de la Sécurité publique du Québec, which coordinates all flood-related operations.
Questions on how Hydro‑Québec facilities are managed? Contact us at email@example.com or RAM_Laurentides_HQ@hydro.qc.ca..
What are the facilities owned by Hydro‑Québec in the Montréal and Laval regions?
Hydro‑Québec owns only one facility in the Montréal and Laval administrative regions: Rivière‑des‑Prairies generating station, located on the river of the same name that flows between the islands of Montréal and Île Jésus.
Why can’t Hydro‑Québec hold back more water at the generating stations on the Outaouais and Rivière‑des‑Prairies rivers?
Those generating stations are run‑of‑river stations, which means that they cannot hold back water during flood periods the way reservoirs do (whether connected to a generating station or not). On the upper Outaouais, Hydro‑Québec strategically manages Decelles, Dozois, Baskatong and Cabonga reservoirs to reduce the impact of spring floods.
What is the purpose of the water level variations in the Outaouais and Rivière‑des‑Prairies rivers?
Hydro‑Québec needs to ensure healthy river management for electricity generation (meeting demand), the safety of facilities during flood periods and adaptation to climate change.
Why has the flow in the Saint‑Laurent been higher since 2017?
Inflows to the Saint‑Laurent come mainly from Lake Ontario, the most downstream of the Great Lakes. Throughout the decades, these lakes have gone through wet cycles and dry cycles. The latest wet cycle, which began in 2015, led to a gradual rise in the water levels of the Great Lakes, and a subsequent increase in the flow of the Saint‑Laurent. Since 2017, the levels of the Great Lakes have been higher than average and these lakes have also been receiving above‑normal precipitation. It is therefore necessary to accept higher flows in the Saint‑Laurent to ensure the safe management of this major river. Similar conditions were observed in the 1970s and 1990s.
How are citizens informed of the progress of the flood on the Outaouais and Rivière‑des‑Prairies rivers?
The Sécurité civile and municipalities are responsible for informing citizens and managing emergency response operations, including in the event of a flood risk. In collaboration with the Ottawa River Regulation Planning Board and the International Lake Ontario – Saint Lawrence River Board, Hydro‑Québec informs the Sécurité civile and municipalities of the water level variations in the Outaouais during flood periods.