The Mattagami River is a river in Northern

Ontario Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central Ca ...

, Canada. The Mattagami flows from its source at Mattagami Lake in

geographic Geography (from Greek: , ''geographia''. Combination of Greek words ‘Geo’ (The Earth) and ‘Graphien’ (to describe), literally "earth description") is a field of science devoted to the study of the lands, features, inhabitants, and ...

Gouin Township in the Unorganized North Part of Sudbury District, on the

Canadian Shield The Canadian Shield (french: Bouclier canadien ), also called the Laurentian Plateau, is a geologic shield, a large area of exposed Precambrian igneous and high-grade metamorphic rocks. It forms the North American Craton (or Laurentia), the anc ...

southwest of

Timmins Timmins ( ) is a city in northeastern Ontario, Canada, located on the Mattagami River. The city is the fourth-largest city in the Northeastern Ontario region with a population of 41,145 (2021). The city's economy is based on natural resource ext ...

, Length to head of Lake Minissinakwa. to Portage Island in geographic Gardiner Township in the Unorganized North Part of Cochrane District, in the

Hudson Bay Lowlands The Hudson Bay Lowlands is a vast wetland located between the Canadian Shield and southern shores of Hudson Bay and James Bay. Most of the area lies within the province of Ontario, with smaller portions reaching into Manitoba and Quebec. Many wide ...

. Here the Mattagami's confluence with the

Missinaibi River The Missinaibi River is a river in northern Ontario, Canada, which flows northeast from Missinaibi Lake, north of Chapleau, and empties into the Moose River, which drains into James Bay. This river (including Missinaibi Lake and Moose River t ...

forms the Moose River, about from that river's tidewater outlet at James Bay. The Mattagami River flows through the city of Timmins as well as the town of

Smooth Rock Falls Smooth Rock Falls is an incorporated town in the Cochrane District in Northeastern Ontario, Canada, with a population of 1,330 at the 2016 census. Geography and transportation The town lies on the Mattagami River and on Highway 11. The next fu ...

and its drainage basin encompasses . The Mattagami's name comes from the

Ojibwe The Ojibwe, Ojibwa, Chippewa, or Saulteaux are an Anishinaabe people in what is currently southern Canada, the northern Midwestern United States, and Northern Plains. According to the U.S. census, in the United States Ojibwe people are one of ...

and means either "the start of water" (''maadaagami'') or "turbulent water" (''madaagami''), but the local

population claim "Mattagami" is a corrupted form of "confluence" (''maadawaagami''). According to the Mattagami First Nation, Mattagami means "Meeting of the Waters".

Course

The river starts at Mattagami Lake and ends at its confluence with

, serving as a source for Moose River. Shows the course of the river highlighted on a map.

Economy

Where the Groundhog and Kapuskasing Rivers flow into the Mattagami,

Ontario Power Generation Ontario Power Generation Inc. (OPG) is a Crown corporation and "government business enterprise" that is responsible for approximately half of the electricity generation in the province of Ontario, Canada. It is wholly owned by the governmen ...

operates the Little Long Generating Station, with a dam just over 5 km in length.

Tributaries

Tributaries include the: *

Kapuskasing River The Kapuskasing River is a river in the James Bay drainage basin in Cochrane District and Algoma District in northeastern Ontario, Canada. Shows the river course. The river is a left tributary of the Mattagami River. Course The river begins at ...

**Nemegosenda River ***Chapleau River * Groundhog River ** Ivanhoe River **Nat River * Poplar Rapids River * Kamiskotia River *Grassy River *Tatachikapika River * Mattagami Lake **Minisinakwa River ***Nabakwasi River ****Opikinimika River ***Noble River

References

External links

Mattagami Region Conservation Authority
{{Authority control Geography of Timmins Rivers of Timiskaming District Rivers of Sudbury District Rivers of Cochrane District Tributaries of Hudson Bay

Course

Economy

Tributaries

See also

References

External links