Saint Mary River (Oldman River)
Saint Mary River St. Mary River |
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Saint Mary River above Lower Saint Mary Lake |
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Data | ||
Water code | US : 776125 | |
location |
Montana ( United States ), Alberta ( Canada )
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River system | Nelson River | |
Drain over | Oldman River → South Saskatchewan River → Saskatchewan River → Nelson River → Hudson Bay | |
Headwaters | SE flank of Gunsight Mountain in the Lewis Range 48 ° 37 ′ 13 ″ N , 113 ° 44 ′ 37 ″ W |
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Source height | approx. 2300 m | |
muzzle |
Oldman River Coordinates: 48 ° 54 '11 " N , 113 ° 19' 3" W 48 ° 54 '11 " N , 113 ° 19' 3" W. |
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Mouth height | 835 m | |
Height difference | approx. 1465 m | |
Bottom slope | approx. 7.3 ‰ | |
length | approx. 200 km | |
Catchment area | approx. 3700 km² | |
Discharge at the gauge near Lethbridge A Eo : 3340 km² Location: 13 km above the estuary |
MQ 1911/2000 Mq 1911/2000 |
14.93 m³ / s 4.5 l / (s km²) |
Left tributaries | Swiftcurrent Creek | |
Flowing lakes | Gunsight Lake, Saint Mary Lake , Lower Saint Mary Lake | |
Reservoirs flowed through | St. Mary Reservoir |
The Saint Mary River (short form: St. Mary River ) is an approximately 200 km long right tributary of the Oldman River in Montana (USA) and Alberta (Canada).
The Saint Mary River has its source in the Rocky Mountains in the US American Glacier National Park . Its headwaters are located on the southeast flank of Gunsight Mountain in the Lewis Range . The river flows through Gunsight Lake and Saint Mary Lake within the national park. Then it flows through the Lower Saint Mary Lake , into which the Swiftcurrent Creek flows from the west . Below the lake is a drainage dam on which part of the river water is diverted to the North Fork Milk River , a tributary of the Milk River , for irrigation purposes . The river flows in a predominantly north-northeast direction through the Great Plains . He crosses the border into Canada. 45 km southwest of Lethbridge , the Saint Mary River is dammed to form the 37.5 km² St. Mary Reservoir . Finally, 10 km southwest of Lethbridge, the river flows into the Oldman River, the right source river of the South Saskatchewan River .
A rock formation with dinosaur skeleton finds, the St. Mary River Formation , was named after the river.
Web links
Individual evidence
- ↑ Saint Mary River in the Geographic Names Information System of the United States Geological Survey
- ↑ Station Code 05AE006, ST. MARY RIVER NEAR LETHBRIDGE . R-ArcticNET. Retrieved September 19, 2017.
- ↑ St. Mary / Milk River - 1909 Boundary Waters Treaty . Alberta Environment and Parks. Retrieved September 19, 2017.
- ^ Alberta Lakes, St. Mary Reservoir . University of Alberta. Retrieved September 19, 2017.