The Bras de Jacob Ouest is a tributary of the Bras de Jacob, flowing successively in the unorganized territory of Lac-Ministuk, in the Le Fjord-du-Saguenay Regional County Municipality, then in Saguenay, in the administrative region of Saguenay–Lac-Saint-Jean, in province from Quebec, to Canada. The course of the Bras de Jacob Ouest crosses the northwest part of the zec Mars-Moulin. The small valley of the Bras de Jacob Ouest is served indirectly by the route 175 which passes on the west side and by the path of Lac-du-Bois-Joli which passes on the north shore of the lake Jacob. A few other secondary forest roads serve the valley of the Bras de Jacob Ouest, especially for forestry and recreational tourism activities. Forestry is the main economic activity in this valley; recreational tourism, second. The surface of Bras de Jacob Ouest is usually frozen from the beginning of December to the end of March, however the safe circulation on the ice is generally done from mid-December to mid-March.
Geography
The main watersheds adjacent to the Bras de Jacob Ouest are:
south-west of the confluence of Bras de Jacob Ouest and Bras de Jacob;
south-east of the Portage-des-Roches dam, erected at the head of the Chicoutimi River.
From its source, the Bras de Jacob Ouest flows over with a drop of entirely in the forest zone, according to the following segments:
towards the east by forming a curve towards the south while leaving the Laurentides Wildlife Reserve to enter the zec Mars-Moulin, until the discharge of some small lakes;
north-east, collecting three small streams, up to the outlet of lakes Thériault and des Perches;
towards the northwest by cutting the eastern part of the Laurentides Wildlife Reserve and collecting the discharge of Lac de la Flache, up to at the outlet of Lac Flévy;
to the north in a deep valley at the start of the segment, returning to the zec Mars-Moulin and meandering at the end of the segment, to its mouth.
The Bras de Jacob Ouest spills onto the south bank of the Bras de Jacob. This confluence is located at:
east of route 175;
south-east of the confluence of the Simoncouche River and Kenogami Lake;
south-west of the village of Laterrière;
south-west of the confluence of Jacob's arm and rivière du Moulin;
south-east of the Portage-des-Roches dam, erected at the head of the Chicoutimi River;
south of the confluence of the rivière du Moulin and the Saguenay River in the Chicoutimi sector of the city of Saguenay.
From the mouth of Bras de Jacob Ouest, the current successively follows the course of Bras de Jacob on towards the east, the course of the rivière du Moulin on towards the north, then the course of the Saguenay River on towards the east until at Tadoussac where it merges with the Saint Lawrence Estuary.
