History and catchment area of the Assiniboine Rivers
Mouth of the Assiniboine River in Winnipeg
The Assiniboine River is a 1070 km long left tributary of the Red River of the North, which flows through the prairies of western Canada.
The river runs strongly meandering in a southeasterly and then easterly direction through the provinces of Saskatchewan and Manitoba. The river rises in eastern Saskatchewan and flows in Winnipeg in the Red River of the North. At Shell Portsmouth in Manitoba, the river is dammed by the Shell Mouth Dam since 1967, causing the water level of the river is controlled. In Portage la Prairie since 1970 a part of the river water to Lake Manitoba is derived. The name of the river comes from the Assiniboine First Nations. The catchment area of the Assiniboine River is 182,000 km ², of which 21.4 thousand km ² in the USA.
Among the tributaries of the Assiniboine Rivers include the opening into the Souris River near Wawanesa, the Birdtail River, and the opening into the vicinity of the historic Fort Ellice Qu'Appelle River.
Since 1913 the water level of the river is measured at three official measuring points.