(upstream) cours d'eau Georges-Fleurent, La Grande Décharge, ruisseau Louis-Proulx, Saint-Zéphirin River, Sévère-René River, ruisseau Grady, ruisseau Boisvert, rivière des Saults, ruisseau du Rang Saint-Édouard, ruisseau Blais, cours d'eau Louis-Morin, rivière ?, ruisseau Onzième, ruisseau Lalancette, ruisseau Champagne, ruisseau Donat-Plante, ruisseau Landry-Lemire, ruisseau Gervais-Léveillée, La Coulée Naturelle, cours d'eau Fontaine, cours d'eau Bernier et Frères, ruisseau Abercrombie, ruisseau Francoeur, Landry River, cours d'eau Jacques, ruisseau Soucy.
The "Nicolet Sud-Ouest River" has its source at "Lac chez Piet" located between two mountains in the territory of the municipality of Dudswell. This spring is located at 6.2 kilometres (3.9 mi) south of the village of Saint-Camille, at 1.2 kilometres (0.75 mi) east of the route 216, at 1.4 kilometres (0.87 mi) east of Lake Watopeka and 8.5 kilometres (5.3 mi) south-west of the center of the village of Saint-Adolphe-de-Dudswell.
Upper course of the river (segment of 58.8 kilometres (36.5 mi))
From "Lac chez Piet", the "Nicolet Sud-Ouest" river flows over:
3.0 kilometres (1.9 mi) southwesterly, up to the limit of the municipality of Danville (Shipton sector);
8.7 kilometres (5.4 mi) west, to the railroad it crosses at 1.7 kilometres (1.1 mi) north of the center of the village of Danville;
2.9 kilometres (1.8 mi) west, forming a large loop north bypassing the village of Danville, to the confluence of the Landry River;
9.4 kilometres (5.8 mi) north-west, in the municipality of Danville (Shipton sector) to the bridge (route 255) southwest of the village of Saint-Félix-de-Kingsey.
Intermediate course of the river (segment of 39.3 kilometres (24.4 mi))
From the village of Kingsey Falls, the Nicolet Sud-Ouest river flows over:
9.8 kilometres (6.1 mi) towards the north-west, cutting on 0.4 kilometres (0.25 mi) the southern corner of the territory of Sainte-Élisabeth-de-Warwick, and crossing on 2.1 kilometres (1.3 mi) the territory of Sainte-Séraphine, up to the limit of the municipalities of Kingsey Falls and Saint-Lucien;
3.8 kilometres (2.4 mi) westward through Saint-Lucien, to the Domaine Parent bridge;
14.5 kilometres (9.0 mi) north-west, to the bridge located southwest of the village of Sainte-Clothilde-de-Horton; its course is then only 0.5 kilometres (0.31 mi) (on the southwest side) of the course of the Nicolet River;
6.5 kilometres (4.0 mi) northwesterly, to the confluence of the Sévère-René River;
2.3 kilometres (1.4 mi) northwesterly, to the confluence of the Saint-Zéphirin River;
12.3 kilometres (7.6 mi) north, up to its confluence.
The "South-West Nicolet River" empties on the west bank of the Nicolet River, at 3.7 kilometres (2.3 mi) upstream of Moras Island, at 200 metres (660 ft) downstream of the Île de l'Île bridge and 2.0 kilometres (1.2 mi) upstream of the Pierre-Roy bridge (route 132). The confluence of the "Nicolet Sud-Ouest river" is located 6.1 kilometres (3.8 mi) upstream from the confluence of the Nicolet River with the St. Lawrence River.[1]
The main tributaries of the Nicolet Sud-Ouest river are:
