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The ExpeditionMissouri River Scenes
Tywappity Bottom
Mouth of the Missouri

The Big Muddy Joins the Mighty Miss

Confluence, Missouri and Mississippi Rivers

Pass cursor over photo to read details.

he Missouri River still contributes its tint, and something of its personality, to the Mississippi a few miles north of St. Louis. It curves around the point called Map comparing Missouri-Mississippi confluence, 1804 and todayColumbia Bottom with a flourish, nuzzles past two faintly discernable wing dams, embraces a small island with a seasonal slough, and yields itself to the Mississippi. Diesel-powered towboats drive long strings of barges back and forth between Minneapolis, Minnesota, and Baton Rouge, Louisiana, and some begin up the Missouri as far as Sioux City, Iowa. Cargoes include petroleum and related products, coal and coke, iron and steel, chemicals, grain, sand and gravel, and sulfur.

Dimly visible near the corner at lower right, almost opposite the debouchment of the Missouri, is the mouth of the Cahokia Creek Diversion Channel, where an interpretive center is under construction (beginning in the summer of 2001) at the Lewis and Clark State Historic Site.

Wood River, which lent its name to the Corps of Discovery's cantonment of the winter of 1803-1804, is out of sight, somewhere at upper right.

The recent history of its riverine perigrinations can more or less clearly be read in the landforms and riparian vegetation evident in Jim Wark's photograph. The confluence today is thought to be several miles south of where it was in 1804, and a mile or two to the east.

Compare this view with a detail from Clark's map of 1814, and the corresponding location from the Missouri River Commission map.

* Not to be confused with Big Muddy Creek, which enters the Missouri River--the really Big Muddy--a few miles upstream from Culbertson, Montana. That's the stream "of a yellowish Colour" which, on April 29, 1805, Clark named "Martha's." or "Marthey's river in honor to the Selebrated M.F"--though nothing else is known about her.

--Joseph Mussulman; rev. 02/04

Tywappity Bottom
Mouth of the Missouri

From Discovering Lewis & Clark ®, http://www.lewis-clark.org © 1998-2014
by The Lewis and Clark Fort Mandan Foundation, Washburn, North Dakota.
Journal excerpts are from The Journals of the Lewis and Clark Expedition, edited by Gary E. Moulton
13 vols. (Lincoln: University of Nebraska Press, 1983-2001)