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Dusaux Lake
Broadback map.png
Broadback River basin in yellow
Dusaux Lake is located in Quebec
Dusaux Lake
Dusaux Lake
Location in Quebec
Location Baie-James
Coordinates 50°45′56″N 77°57′26″W / 50.76556°N 77.95722°W / 50.76556; -77.95722
Type Natural
Primary inflows Nottaway River, Davoust River
Primary outflows Nottaway River
Basin countries Canada
Max. length 23.0 kilometres (14.3 mi)
Max. width 1.7 kilometres (1.1 mi)
Surface area 10.58 kilometres (6.57 mi)
Surface elevation 210 metres (690 ft)
Islands 16

Lake Dusaux is a freshwater body of the territory of Eeyou Istchee Baie-James (municipality), in the administrative region of Nord-du-Québec, in the province of Quebec, in Canada.

The Dusaux Lake hydrographic slope is accessible via the James Bay (north-south) road from Matagami to 10.4 kilometres (6.5 mi) on the East side of Lake Dusaux, and then going back north passing between Mouliers Lake and Katutupisisikanuch. The surface of the lake is generally frozen from early November to mid-May, however safe ice circulation is generally from mid-November to mid-April.


This lake has a length of 23.0 kilometres (14.3 mi), a maximum width of 1.7 kilometres (1.1 mi) and an altitude of 283 metres (928 ft).

Lake Dusaux has 16 islands, the largest of which (Vandry Island) are located downstream. Lake Dusaux is crossed to the northwest by the Nottaway River.

Lake Dusaux begins at the foot of the Iroquois Falls in the Southeast that is fed by the Nottaway River, facing the Nestipuku Islands. This lake is also fed to the northeast by the Davoust River which empties in front of Michikushish Island. In the center of the lake, the current flows through the northwest in a zone of rapids bypassing the Desmolier Islands. Dusaux Lake terminates downstream of Vandry Island (length: 2.6 kilometres (1.6 mi) which is shaped like a half-moon.

The mouth of this Lake Dusaux is located northwest, downstream of Vandry Island. Then the current of the Nottaway River will flow into Rupert Bay. The mouth of Lake Dusaux is located at:

  • 79.3 kilometres (49.3 mi) Aoutheast of the mouth of the Nottaway River;
  • 123.4 kilometres (76.7 mi) Northwest of downtown Matagami;
  • 103.7 kilometres (64.4 mi) East of the Ontario boundary.

The main hydrographic slopes near Lake Dusaux are:


The term "Dusaux", "Dussault" and "Dussaulx" are variants of the same surname of French origin.

The toponym "Lac Dusaux" was formalized on December 5, 1968, by the Commission de toponymie du Québec.

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