The Rivière du Moulin (English: river of the Mill), also called Rivière Langevin, is a tributary of the Saguenay River.Its mouth is located in the Rivière-du-Moulin district, in the east of the Chicoutimi borough in Saguenay.The river is known for its urban park, the Rivière-du-Moulin park, located on its banks near its mouth.. The upper part of the Moulin river valley is served by the ...