The North Arm takes its source at the mouth of a mountain stream. This source is located east of the Baie de la Brûlée du Lac La Mothe, southeast of the dam at the mouth of Onatchiway Lake, to the North-East of the dam at the mouth of lac La Mothe, in the North-East of the mouth of Bras du Nord, West of Moncouche Lake and North of Saguenay River. From its source, the course of the Bras du Nord descends on according to the following segments:
south-east, up to the Bérubé stream ;
towards the South-East, up to the Romeo stream ;
towards the Southeast, up to the stream bras de Fer ;
towards the South-West, by forming a curve by skirting a mountain to redirect towards the South-East, until the discharge of a set of lakes;
south-east, to the mouth of the river.
The mouth of the Bras du Nord spills onto the west bank of the Valin River at the foot of the Chute à Banc d'oeuvre. This mouth is located at:
North-West of the mouth of the Valin River ;
north of downtown Saguenay;
West of the mouth of the Saguenay River.
From the mouth of the Bras du Nord, the current follows the course of the Valin River, then the course of the Saguenay river up to Tadoussac where it merges with the St. Lawrence river.
Toponymy
Formerly, this watercourse was designated "Rivière Falardeau", which was associated with the township of Falardeau, in Saguenay-Lac-Saint-Jean. The name of this old toponym evokes the career of the painter Antoine-Sébastien Falardeau ; Falardeau had a career mainly in Italy, his second homeland. Falardeau was above all dedicated to making excellent copies of great masters of painting. His training as a painter is little known; he took painting lessons and was apprenticed as a sign painter with Robert Clow Todd in 1841 in Quebec. It is possible that the Italian painter G. Fassio, who had been staying in this city since 1835, oriented him towards Italy and taught him the basics of Italian. In 1846 Falardeau left Quebec for Florence. After difficult years, his reputation was established: Charles III, Duke of Parma, appointed him knight of the order of Saint Louis, January 17, 1852. He married Caterina Manucci-Benincasa, daughter of the Marquis Francesco Mannucci-Benincasa Capponi, in 1861, with whom he had at least three children. In 1862 and 1882, he returned to Canada briefly and exhibited his paintings there. The Canadian government commissioned him in 1882 to paint a portrait of Joseph-Adolphe Chapleau, a former premier of the province of Quebec. He accidentally dies in Florence, his horse, wrapped up, having thrown him into the river. The dispersion of his paintings made it impossible to study in depth his work. The Musée du Québec, however, has twenty. The toponym "Bras du Nord" was formalized on April 8, 1975, at the Place Names Bank of the Commission de toponymie du Québec, that is to say at the creation of this commission.