Priority work - Modernization of the Beauharnois–Les Cèdres complex

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Priority work

Studies and investigations were carried out until the end of 2021. While that was being done, priority work on certain structures had also begun.

Consult the following documents to learn more about the planned work:

Îles‑de‑Saint‑Timothée regional park sector

Environmental compensation project following work on structure 1
Stabilization of structure 2 foundations ‑ André‑Lamanque bridge
Refurbishment of bridges P‑128 and P‑129 linking Île aux vaches and Île Saveuse
Notice of inventory of water intakes, waterside infrastructure and recreational uses of the Rivière Saint‑Charles [PDF 397 kB ‑ in French only]

Fleuve Saint‑Laurent structures sector

Info-project – Replacement of a valve system near the Coteau-1 dam [PDF 301 kB - in French only]
Public notice – Replacement of a valve system near the Coteau-1 dam – April 2025 [PDF 515 kB]
Info-project – Addition and replacement of booms on Fleuve Saint-Laurent [PDF 416 kB]

Beauharnois Canal sector

Project News – Postponed work (Hungry Bay) [PDF 234 kB – in French only]
Project News Reconstruction of the Canal Saint-Louis (Hungry Bay) Intake [PDF 2.2 MB]
Refurbishment of the Beauharnois road bridge (Route 132)
Refurbishment of Beauharnois Canal dikes

Project site of priority work

Download the map [PDF 659 kB]

Click on the different elements shown on the map below
to find out more.

Facility

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Legend

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Info-Project – Modernization of the Beauharnois–Les Cèdres hydropower complex

Stay informed on the stages of the project and the progress of work.

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Did you know?

The storage capacity of the Great Lakes is 22,950 billion cubic metres of water, or the equivalent of over six million Olympic pools.

Did you know?

The watershed of the Great Lakes and the Fleuve Saint-Laurent (St. Lawrence River) is one of the most diverse in the world. It is home to 3,500 species of plants and vertebrates, and over 250 species of fish.

Did you know?

The Moses-Saunders dam supplies two hydroelectric generating stations: the R.H. Saunders generating station, which is located on the Canadian side of the border and has an installed capacity of 1,045 MW; and the Robert Moses generating station, on the U.S. side, whose installed capacity is 912 MW.

Did you know?

Note interne : Prévoir un autre "Saviez-vous que" pour clarifier que la première vocation du canal de Beauharnois, avant la production hydroélectrique, est de servir à la Voie Maritime du Saint-Laurent pour la navigation commerciale.

Did you know?

Before the Beauharnois Light Heat and Power Company began the construction of the Beauharnois canal in 1929, all the water from Lac Saint-François flowed along the natural riverbed of the Fleuve Saint-Laurent (St. Lawrence River). The canal diverts a significant portion of water toward Beauharnois generating station to maximize hydropower generation.

A number of compensatory structures, such as the Île-Juillet, Saint-Timothée, Pointe-du-Buisson and Pointe-des-Cascades dams, were built along the natural riverbed to maintain the river’s natural appearance and optimize its use by riverside communities.