| Mattagami River Rivière Mattagami (in French) | |
|---|---|
 Mattagami River at Smooth Rock Falls | |
  Location of the mouth of the Mattagami River in Ontario | |
| Etymology | Ojibwe language |
| Location | |
| Country | Canada |
| Province | Ontario |
| Region | Northeastern Ontario |
| Districts | |
| Physical characteristics | |
| Source | Mattagami Lake |
| • location | Gouin Township, Sudbury District |
| • coordinates | 48°00′46″N 81°33′28″W / 48.01278°N 81.55778°W |
| • elevation | 330 m (1,080 ft) |
| Mouth | Moose River |
• location | Gardiner Township, Cochrane District |
• coordinates | 50°43′42″N 81°29′14″W / 50.72833°N 81.48722°W |
• elevation | 48 m (157 ft) |
| Length | 443 km (275 mi) |
| Basin size | 37,000 km2 (14,000 sq mi) |
| Basin features | |
| River system | James Bay drainage basin |
The Mattagami River is a river in Northern Ontario, Canada.
The Mattagami 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".
- ^ "Gouin" (PDF). Geology Ontario - Historic Claim Maps. Ontario Ministry of Northern Development, Mines and Forestry. Retrieved 2011-09-20.
- ^ a b "Rivers Flowing into Hudson Bay, James Bay or Ungava Bay - Moose River". Rivers. Atlas of Canada. Archived from the original on 2013-01-22. Retrieved 2011-09-20. Length to head of Lake Minissinakwa.
- ^ "Gardiner" (PDF). Geology Ontario - Historic Claim Maps. Ontario Ministry of Northern Development, Mines and Forestry. Archived from the original (PDF) on 2012-03-27. Retrieved 2011-09-20.
- ^ "Ecozones". Far North Ontario. Ontario Ministry of Natural Resources. 2011-04-07. Retrieved 2011-09-20.
- ^ 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.