| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Irene River (Opawica River tributary) | Rivière Opawica | 47,800 | 49.5441666667 | -74.8361111111 | Map | ||||||
| Nicobi River | Rivière Opawica | 9,900 | 49.4561111111 | -75.9333333333 | Map | ||||||
| Little Waswanipi River | 321 | Rivière Opawica | 19,900 | 49.6822200000 | -75.9627800000 | Map |