Grand River, South Dakota

Grand River
Grand River at Little Eagle, South Dakota
Data
Water code	US :  1265233
location	South Dakota (USA)
River system	Mississippi River
Drain over	Missouri  → Mississippi  → Gulf of Mexico
Confluence of	South Fork and North Fork at Shadehill, SD 45 ° 45 ′ 10 ″  N , 102 ° 11 ′ 56 ″  W
muzzle	in the Missouri River dammed up to Lake Oahe coordinates: 45 ° 34 ′ 32 ″  N , 100 ° 28 ′ 2 ″  W 45 ° 34 ′ 32 ″  N , 100 ° 28 ′ 2 ″  W
Mouth height	approx.  490  m
length	177 km
Flowing lakes	Shadehill Reservoir

The Grand River is a right tributary of the Missouri River in South Dakota in the USA . Its length is 177 km.

The Grand River is formed by the confluence of the North Fork (129 km long, coming from North Dakota ) and the South Fork (145 km long) near the town of Shadehill in Perkins County in South Dakota and not far from the Grand River National Grassland .

The river then flows east through the Standing Rock Indian reservation and emptied into the Missouri before the establishment of the reservoir Lake Oahe at Mobridgein . Due to the backwater of the Missouri, the confluence with the reservoir is already about 15 kilometers west of the city.