A few streams run through the canton, connected to the Toulnustouc North-East River system, notably the Ruisseau Kaushkuepakau.

[3] The members of the Uashat Mak Mani-Utenam band of Innu people make use of parts of the Toulnustouc River basin, including Fortin Lake, Caron Lake, and the Northeast Toulnustouc River.

[5] A map of the Ecological regions of Quebec shows the river rising and flowing south through ecological subregions 6r-T (Massif des monts Groulx), 6i-T (Hautes collines du réservoir Manic 3) and 6j-S (Hautes collines des lacs Nipissis et Magpie) of the eastern spruce/moss domain of the boreal zone.

[3] The railway engineers ran the line along the well-drained rocky shoreline of the river, staying safely above the level of spring floods.

[10] Lakes in the south part of the river basin, in the Port-Cartier–Sept-Îles Wildlife Reserve, include: