Souris River

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Souris River
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The river in the town of Souris, Manitoba
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The Red River drainage basin, with the Souris River highlighted
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Native nameTemplate:Native name checker
Location
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  • Canada
  • United States
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StateNorth Dakota
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Physical characteristics
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MouthAssiniboine River
 • location
Manitoba, Canada
 • coordinates
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 • elevation
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LengthTemplate:Infobox river/calcunit
Basin size
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Basin features
River systemRed River drainage basin
Tributaries 
 • leftAntler
 • rightGainsborough
[1][2]

Script error: No such module "Check for conflicting parameters".The Souris River (/ˈsʊərɪs/; Template:Langx) or Mouse River (as it is alternatively known in the U.S., a translation of its French name) is a river in central North America.[3] Approximately 700 kilometres (400 mi) in length, it drains about 61,100 square kilometres (23,600 mi2) in Canada and the United States.

Rising in southern Saskatchewan in the Yellow Grass Marshes north of Weyburn, the river wanders southeast into the U.S. through North Dakota beyond Minot to its most southern point at Velva, and then back north into Canada in southwestern Manitoba.

File:Highway 9 Souris Valley 03.jpg
Saskatchewan Highway 9 in the upper Souris River Valley

Flowing east, it passes through the communities of Melita, Hartney, Souris, and Wawanesa, Manitoba, prior to the confluence with the Assiniboine River near Treesbank, about 40 kilometres (25 mi) southeast of Brandon. The main tributaries of the Souris in Manitoba are the Antler River, Gainsborough Creek, and Plum Creek. The elevation at the confluence is approximately 340 metres (1,120 ft) above sea level.

At the end of the last ice age, over 10,000 years ago, the rapid draining of Glacial Lake Regina eroded a large channel that is now occupied by the much smaller contemporary Souris River.[4] Also, much of the drainage basin is fertile silt and clay deposited by another former glacial lake, Lake Souris.

Flow rates and flood potential

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.

Most of the annual flow of the Souris River comes from snow melt and spring rains. The annual flow volume varies dramatically from 3,400 acre-feet (4,200,000 m3) in 1937 to 2,100,000 acre-feet (2.6 km3) in 1976. It is expected that the total runoff for 2011 at Wawanesa will exceed 3,800,000 acre-feet (4.7 km3) about a one in 500-year event. The average annual runoff is equivalent to 3 mm over the entire Souris River watershed.[5]

Two large dams in Saskatchewan, Rafferty Dam and Grant Devine Dam were built, in part, to reduce flood peaks on the Souris River.

In summer 2011, a historic flood affected much of the Souris River basin, overtopping levees and causing the evacuation of about 11,000 residents in Minot as well as significant damage to farmland and other property along the length of the river.

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 cu ft/s (40 m3/s) through Melita, to about 1,100 cu ft/s (31 m3/s) near Lauder and 1,700 cu ft/s (48 m3/s) near Hartney. North of Hartney the capacity increases to more than 3,000 cu ft/s (85 m3/s). The drop between the border and Hartney is only about six inches per mile (9.5 cm/km).

Location 1882 Peak Flow (cfs) (Estimated) [6][7][8][9] 1976 Peak Flow (cfs) [10] 2011 Peak Flow (cfs) [11][12][13]
Minot 22,813.3[14] 9,350 26,900
Westhope 18,500[15] 12,400 30,400
Melita 30,017.5[16] 21,300 26,800
Souris N/A 24,800 28,200
Wawanesa 39,905.6[17] 26,200 27,800

Tributaries

File:Alameda Reservoir-Alameda Dam (625135522).jpg
Grant Devine Dam and Reservoir on Moose Mountain Creek

Communities along the river

Cities and towns

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Rural Municipalities

Bridges across the river

Fish species

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Fish species include walleye, yellow perch, northern pike, white sucker, black bullhead, goldeye, brown bullhead, smallmouth bass, and burbot.

See also

References

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  1. ^ Page Module:Citation/CS1/styles.css has no content."Natural Resources Canada-Canadian Geographical Names (Souris River)". Retrieved 2014-08-29.
  2. ^ Page Module:Citation/CS1/styles.css has no content."Atlas of Canada Toporama". Retrieved 2014-08-29.
  3. ^ Page Module:Citation/CS1/styles.css has no content."Map of Saskatchewan Showing Completed Watershed Plans" (PDF). Water Security Agency. Retrieved 29 April 2026.
  4. ^ Page Module:Citation/CS1/styles.css has no content."Proglacial Lakes". Esask. Government of Saskatchewan. Retrieved 31 March 2022.
  5. ^ Archived data from Water Survey Canada
  6. ^ Page Module:Citation/CS1/styles.css has no content.Rannie, William .F. (2002). B.D. Thraves (ed.). "The Role of the Assiniboine River in the 1826 and 1852 Red River Floods" (PDF). Prairie Perspectives: Geographical Essays. 5. Regina: University of Regina, Department of Geography: 56–75.
  7. ^ Page Module:Citation/CS1/styles.css has no content.Eugene F. Kozera, P. Eng. (2011). "Recent Flooding and Flood Mitigation in Manitoba" (PDF). Province of Manitoba.
  8. ^ Page Module:Citation/CS1/styles.css has no content."Water Survey of Canada - SOURIS RIVER AT MELITA (05NF001)". Environment Canada.
  9. ^ Page Module:Citation/CS1/styles.css has no content."Water Survey of Canada - SOURIS RIVER AT WAWANESA (05NG001)". Environment Canada.
  10. ^ Page Module:Citation/CS1/styles.css has no content."Daily Water Levels and Forecasts Souris River May 23, 2011" (PDF). Province of Manitoba. 2011.
  11. ^ Page Module:Citation/CS1/styles.css has no content."Mouse River Enhanced Flood Protection Plan - Preliminary Engineering Report" (PDF). North Dakota State Water Commission. February 29, 2012.
  12. ^ Page Module:Citation/CS1/styles.css has no content."2011 Post-Flood Report for the Souris River Basin – Revised March 2012" (PDF). US Army Corps of Engineers St. Paul District. March 2012.
  13. ^ Page Module:Citation/CS1/styles.css has no content."Daily Flood Sheet Souris River July 12, 2014" (PDF). Province of Manitoba. 2014.
  14. ^ Converted from 646 (m3/s)
  15. ^ Estimated from graph
  16. ^ Converted from 850 (m3/s)
  17. ^ Converted from 1130 (m3/s)

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