The Missouri River winds its way across this image of North and South Dakota, USA. Two large reservoirs can be seen along the river’s course: Lake Sakakawea (upper left quadrant) and Lake Oahe (lower right quadrant).
Lake Sakakawea is a reservoir in the Missouri River basin in central North Dakota. It is the third largest man-made lake in the United States, and was created by the Garrison Dam. Here, the western part of the lake appears frozen. Snow can be seen dusting the terrain across the left side of the image as well.
Lake Oahe, on the other hand, is not frozen. It is a large reservoir behind Oahe Dam on the Missouri River beginning in central South Dakota and continuing north into North Dakota in the United States. The lake has an area of 370,000 acres (1,500 km2) and a maximum depth of 205 ft (62 m). By volume, it is the fourth-largest reservoir in the US.