Mattagami River

The Mattagami River flows generally north for approximately 443 kilometres (275 miles). Its drainage area covers about 37,000 square kilometres. The river originates at Mattagami Lake in the Sudbury District, southwest of the city of Timmins, and lies on the Canadian Shield. The upper course incorporates Kenogamissi Lake, which is managed for downstream power generation. The Mattagami flows north through the city of Timmins, which relies on the river as a source of drinking water. Further north, it passes the town of Smooth Rock Falls. Much of the middle section of the river has been developed for hydroelectric power, consisting of a chain of long lakes and reservoirs created by stations such as the Kipling, Smoky Falls, and Little Long Generating Stations. The Mattagami continues its northward course, entering the flatter landscape of the Hudson Bay Lowlands. Its course officially ends at the confluence with the Missinaibi River near Portage Island in the Cochrane District. Significant tributaries feeding the Mattagami include the Groundhog River, the Kapuskasing River, and the Tatachikapika River. ==Economy==

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

Tributaries include the: • Kapuskasing River • 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 ==See also==