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Tributaries include the:
The river originally powered textile mills. Today, it provides hydroelectric power.
The Purdon Conservation Area, a wetland in this river's watershed, contains Canada's largest native colony of showy lady slipper orchids, some 16,000 plants.
The origin of the river's name is something of a mystery; though is current name is certainly derived from that of its much larger American cousin, this is most certainly a corruption of a different native name, as the translation 'great water' would not apply to a relatively minor tributary of the Ottawa, definitely the largest river in the area. Instead, the origin may be "Mazinawzeebi", Algonquian for 'painted image river', though this is by no means proven.