Bras Nord-Ouest
The Bras Nord-Ouest is a tributary of the north shore of lac la Retenue, on the north shore of the St. Lawrence River. It flows in the municipality of L'Ange-Gardien, in the regional county municipality of La Côte-de-Beaupré Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec, in Canada.
The lower part of this valley is served by de la Vallée, des Montagnes and de la Rivière streets.
The surface of the Northwest Arm is generally frozen from the beginning of December until the end of March; however, safe traffic on the ice is generally from mid-December to mid-March. The water level of the river varies with the seasons and the precipitation; the spring flood occurs in March or April.
Geography
The North-West Arm takes its source from a small forest lake. This source is located in a cuvée between mountain peaks in the municipality of Château-Richer, at:- east of a curve of the Montmorency River;
- north of the confluence of the Bras Nord-Ouest and Lac la Retenue;
- north-west of the north-west bank of the St. Lawrence River.
- south-west in a deep valley and crossing a small lake, then curving south at the end of the segment, until the outlet of a small lake;
- towards the south-east down the mountain in a deep valley, to a bend of the river corresponding to the discharge of a stream;
- first towards the east first in the forest zone, then agricultural, bending towards the south to collect the discharge of a small lake, and crossing a small lake, then bending west at the end of the segment, to its mouth.
From the confluence of the North-West Arm, the current crosses southwards Lac la Retenue first by an L-shaped bay, up to the dam; flows south on via Rivière la Retenue; on generally towards the southeast following the course of the Ferrée river; then on east by the course of the Montmorency River, to the northwest shore of the Saint-Laurent river.