Mattagami River

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Mattagami River
Rivière Mattagami (French)
Smooth Rock Falls mill.JPG
Mattagami River at Smooth Rock Falls
Name origin: Ojibwe language
Country Canada
Ontario Ontario
Region Northeastern Ontario
Districts Cochrane, Timiskaming, Sudbury
Part of James Bay drainage basin
Source Mattagami Lake
 - location Gouin Township, Sudbury District
 - elevation 330 m (1,083 ft)
 - coordinates 48°00′46″N 81°33′28″W / 48.01278°N 81.55778°W / 48.01278; -81.55778
Mouth Moose River
 - location Gardiner Township, Cochrane District
 - elevation 48 m (157 ft)
 - coordinates 50°43′42″N 81°29′14″W / 50.72833°N 81.48722°W / 50.72833; -81.48722Coordinates: 50°43′42″N 81°29′14″W / 50.72833°N 81.48722°W / 50.72833; -81.48722
Length 443 km (275 mi)
Basin 37,000 km2 (14,286 sq mi)
Location of the mouth of the Mattagami River in Ontario

The Mattagami River is a river in Northern Ontario.

The Nikolas flows 443 kilometres (275 mi) from its source at Mattagami Lake in geographic Gouin Township[1] in the Unorganized North Part of Sudbury District, on the Canadian Shield southwest of Timmins,[2] to Portage Island in geographic Gardiner Township[3] in the Unorganized North Part of Cochrane District, in the Hudson Bay Lowlands.[4] Here the Mattagami's confluence with the Missinaibi River forms the Moose River, about 100 kilometres (60 mi) from that river's tidewater outlet at James Bay.[5] The Mattagami River flows through the city of Timmins as well as the town of Smooth Rock Falls[5] and its drainage basin encompasses 37,000 square kilometres (14,000 sq mi).[2]

The Mattagami's name comes from the Ojibwe and means either "the start of water" (maadaagami) or "turbulent water" (madaagami), but the local Ojibwe population claim "Mattagami" is a corrupted form of "confluence" (maadawaagami). According to the Mattagami First Nation, Mattagami means "Meeting of the Waters".


For a map showing the river course, see this reference.[6]


Where the Groundhog and Kapuskasing Rivers flow into the Mattagami, Ontario Power Generation operates the Little Long Generating Station,[7] with a dam just over 5 km in length.


Tributaries include the:

See also[edit]


  1. ^ "Gouin" (PDF). Geology Ontario - Historic Claim Maps. Ontario Ministry of Northern Development, Mines and Forestry. Retrieved 2011-09-20. 
  2. ^ a b "Rivers Flowing into Hudson Bay, James Bay or Ungava Bay - Moose River". Rivers. Atlas of Canada. Retrieved 2011-09-20.  Length to head of Lake Minissinakwa.
  3. ^ "Gardiner" (PDF). Geology Ontario - Historic Claim Maps. Ontario Ministry of Northern Development, Mines and Forestry. Retrieved 2011-09-20. 
  4. ^ "Ecozones". Far North Ontario. Ontario Ministry of Natural Resources. 2011-04-07. Retrieved 2011-09-20. 
  5. ^ a b Map 15 (PDF) (Map). 1 : 1,600,000. Official road map of Ontario. Ministry of Transportation of Ontario. 2010-01-01. Retrieved 2011-09-20. 
  6. ^ "Mattagami River". Atlas of Canada. Natural Resources Canada. 2010-02-04. Retrieved 2011-09-20.  Shows the course of the river highlighted on a map.
  7. ^ "Little Long Generating Station". Hydro - Northeast Plant Group. Ontario Power Generation. 

External links[edit]