Souris River
| Souris River | |
| Mouse River, Rivière Souris | |
 The Souris River in the town of Souris, Manitoba.
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| Countries |
 Canada,  United States
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| States/Provinces |
 Saskatchewan,  North Dakota,  Manitoba
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| Part of | Red River drainage basin |
| Tributaries | |
| - left | Antler |
| - right | Gainsborough |
| Cities | Minot, ND, Souris, MB, Weyburn, SK, Melita, MB |
| Source | north of Weyburn |
| - location | Saskatchewan |
| - coordinates | 49°49′53″N 103°47′46″W / 49.83139°N 103.79611°W |
| Mouth | Assiniboine River |
| - location | Manitoba, Canada |
| - coordinates | 49°39′54″N 99°34′07″W / 49.66500°N 99.56861°WCoordinates: 49°39′54″N 99°34′07″W / 49.66500°N 99.56861°W |
| Length | 435 mi (700 km) |
| Basin | 23,600 sq mi (61,124 km2) |
 The Red River drainage basin, with the Souris River highlighted
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The Souris River (French: rivière Souris) or Mouse River (as it is alternatively known in the U.S.) is a river in central North America. It is about 700 km (435 mi) in length and drains about 23,600 square miles (61,100 km2). It rises in the Yellow Grass Marshes north of Weyburn, Saskatchewan. It wanders south through North Dakota beyond Minot to its most southern point at the city of Velva, and then back north into Manitoba. The river passes through the communities of Melita, Hartney, Souris and Wawanesa and on to its confluence with the Assiniboine River at Treesbank, about 25 miles (40 km) south east of Brandon. The main tributaries which flow into the Souris in Manitoba are the Antler River, the Gainsborough and Plum Creeks. Much of its drainage basin is fertile silt and clay deposited by former glacial Lake Souris.
The channel capacity of the river in Manitoba varies from about 150 cubic feet per second (4.2 m3/s) near the border, to about 1,400 cubic feet per second (40 m3/s) through Melita, to about 1,100 cubic feet per second (31 m3/s) near Lauder and 1,700 cubic feet per second (48 m3/s) near Hartney. North of Hartney the capacity increases to more than 3,000 cubic feet per second (85 m3/s). The drop between the border and Hartney is only about 6 inches per mile (9.5 cm/km).
During the period from 1930 to 1941 severe drought conditions prevailed and PFRA constructed four stock watering dams. In 1937 the Snyder and Ross Dams were built near Melita. In 1938 the Napinka Dam was built and the Hartney Dam was built in 1941. These were all stop log dams with a total capacity of 2,400 acre feet (3,000,000 m3). The Souris Dam was originally built in 1911 and was rebuilt in 1935. The Wawanesa Dam was completed in 1951 storing about 320 acre feet (390,000 m3) of water.
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Wikipedia