Sainte-Anne River (Les Chenaux)

Sainte-Anne River (Les Chenaux), Teyaiar River (Wendat), rivière Sainte-Anne (French), flows from north to south on the north shore in the estuary section of the St. Lawrence River, in Les Chenaux, Portneuf and La Jacques-Cartier RCM, Mauricie and National Capital regions, Quebec, Canada.

The Sainte-Anne River has its source in the Laurentides Wildlife reserve, in Lake Sainte-Anne. The river, approximately 120 km long, flows from north to south, crossing the municipalities of Saint-Alban and Saint-Casimir to end its course at Sainte-Anne-de-la-Pérade, on the north shore of the estuarine section. of the St. Lawrence River.

In terms of surface area, the 1894 landslide in Saint-Alban would be the largest in the known history of Quebec.

During the night of April 27 to 28, 25 km from the mouth of the Sainte-Anne River, in Saint-Alban, 600 ha of soil slid into the bed of the Noire River, the large quantity of displaced soil modified the geography of several secondary watercourses which feed the Sainte-Anne River. The moving sediments block the channel of the Charest River and change the course of the Gendron stream. At 4 km upstream from Sainte-Anne-de-la-Pérade, soil begins to be deposited, creating silting, islands, islets, channels, up to the mouth of the river in the St. Lawrence River.

The landslide of 1894 killed 4 people, upset 8 properties, uprooted bridges and docks, slowed down the transport of wood by floating, affected sawmills and put an end to commercial navigation upstream of Sainte-Anne-de-la-Pérade.

The landslide eroded the banks of the Saint-Anne River, caused numerous secondary landslides and carried earth, sand and gravel. This geological movement modify the watercourses over nearly 25 km. The Sainte-Anne becomes wider and shallower, this new hydrography creates an exceptional aquatic environment for the reproduction of the Tommy cod. Until April 1894, the Sainte-Anne River was a salmon river.

In Portneuf RCM, the Sainte-Anne River region has an area of approximately 185 km² (110 square miles). In the North/South axis, the territory goes from Saint-Alban to the St. Lawrence River. From East to West, it stretches between longitudes 72° and 72°15'.

Saint-Marc-des-Carrières, Saint-Alban, Saint-Casimir, Grondines and Saint-Thuribe are the main municipalities of Portneuf RCM bathed by the Sainte-Anne River. The mouth of the river, at Sainte-Anne-de-la-Pérade, is part of Les Chenaux RCM.