Missouri River Corps of Rediscovery: Throwing Sand

"Passed the mouth of the River Que Courre (rapid R[)] on the L. S. and Came to a Short distance above, this River is 152 yards wide at the mouth & 4 feet Deep Throwing out Sands like the Platt (only Corser) forming bars in its mouth, I went up this river three miles to a butifull Plain on the upper Side where the Panias once had a Village this river widens above its mouth and is devided by Sand and Islands, the Current verry rapid, not navagable for even Canoos without Great dificulty owing to its Sands."

-William Clark, September 4, 1804

Fort Randall Dam marks the end of the Great...