| Blanche River | |
| Pushpin Map: | Quebec |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quebec |
| Subdivision Type3: | Region |
| Subdivision Name3: | Capitale-Nationale, Mauricie |
| Subdivision Type4: | Regional County Municipality |
| Subdivision Name4: | Portneuf Regional County Municipality |
| Subdivision Type5: | Municipalities |
| Subdivision Name5: | Sainte-Catherine-de-la-Jacques-Cartier, Pont-Rouge, Saint-Basile |
| Length: | 7.9km (04.9miles) |
| Source1: | Blanc Lake |
| Source1 Location: | Saint-Raymond, MRC Portneuf Regional County Municipality |
| Source1 Coordinates: | 46.8397°N -71.6927°W |
| Source1 Elevation: | 334m (1,096feet) |
| Mouth: | Portneuf River |
| Mouth Location: | Saint-Basile |
| Mouth Coordinates: | 46.8047°N -71.7475°W |
| Mouth Elevation: | 110m (360feet) |
| Tributaries Left: | Discharge of Lac Linteau. |
The Rivière Blanche is a tributary of the Portneuf River, flowing in the municipalities of Sainte-Catherine-de-la-Jacques-Cartier, Pont-Rouge and Saint-Basile, in the regional county municipality (MRC) of Portneuf Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec, in Canada.
Apart from the passage of the river in a small hamlet of Pont-Rouge (near Lake André), the Blanche river flows especially at the border between the agricultural and forest environment, the main economic activities of this small valley.[1]
This valley is served by chemin du Rang Sainte-Madeleine, chemin du 2e rang du Brûlé, rue Lamothe, chemin Tâché and chemin des Ormeaux.[1]
The surface of the Blanche River (except the rapids areas) is generally frozen from the beginning of December to the end of March; however, safe circulation on the ice is generally from late December to early March. The water level of the river varies with the seasons and the precipitation; the spring flood occurs in March or April.
The Blanche River rises at Lac Blanc located in the northwestern part of the municipality of Sainte-Catherine-de-la-Jacques-Cartier. Its mouth is located southwest of a mountain peak culminating at, at southeast of Sergent Lake, south-west of the village center of Sainte-Catherine-de-la-Jacques-Cartier and north-east of the village center of Saint-Basile.
From the mouth of Lac Blanc, the course of the Blanche River descends on, with a drop of, according to the following segments:
The Blanche river flows on the northeast bank of the Portneuf River. This confluence is located north-west of the center of the village of Pont-Rouge, north of the confluence of the Portneuf and Saint Lawrence River.
From the mouth of the Blanche River, the current descends on the Portneuf River, winding south-west through the St. Lawrence plain, to the north shore of the St. Lawrence River.[2]
The toponym "Rivière Blanche" was formalized on December 5, 1968, at the Place Names Bank of the Commission de toponymie du Québec.[3]