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Lewis and Clark data show a different Missouri River | The Source | Washington University in St. Louis
WUSTL scientists say the present-day Missouri River is narrower and more prone to flooding because of extensive damming of the river.The oldest data available on the Missouri River - from the logs of Lewis and Clark - show that water flow on the river today is far more variable than it was 200 years ago. The data also show that the river is some 220 yards narrower at St. Charles, Mo., today at 500 yards across than in 1804 when it spread out some 720 yards.