12/29/2023 0 Comments Missouri river![]() The longest headwaters stream, and thus the Missouri's hydrologic source, likely begins at Brower's Spring, which flows to the Jefferson by way of several other named streams. ![]() The headwaters of the Missouri are in the Rocky Mountains of southwestern Montana, near the Continental Divide, rising in the Jefferson, Madison, and Gallatin rivers. It drains approximately one-sixth of the North American continent. Its drainage basin occupies about 529,400 square miles (1,371,100 sq km) of the Great Plains, of which 2,550 square miles (16,840 sq km) are in Canada. ![]() With the Lewis and Clark source data, the length is 2,341 miles, while Brower's source extends the length to 3745 miles. When the Missouri meets the Mississippi they form the third longest river system in the world, after the Nile and Amazon Rivers. The Missouri flows into the Mississippi north of St. He discovered the true source to be Brower's Spring, at an approximate elevation of 8,800 feet in the Centennial Mountains. This determination is still widely accepted, though it was disproven by Jacob V. Lewis and Clark determined in 1805 that the Missouri begins at the confluence of the Madison, Jefferson, and Gallatin rivers in Montana. The Missouri River in the United States is the longest tributary of the Mississippi River. Dodge Park, Omaha, NebraskaĬonfluence of Madison, Gallatin and Jefferson in Montana.
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