The Missouri River is just going to keep on flooding

The Missouri River is just going to keep on flooding © Scott Olson / Getty Images

Humans have been struggling to confine it for more than a century. The costs seem to be higher than the benefits.

The Missouri River used to be out of control. "It cuts corners, runs around at nights, fills itself with snags and traveling sandbars, lunches on levees, and swallows islands and small villages for dessert," is how the humorist George Fitch (pretty accurately) described it in 1907.

It was also hugely variable in size and shape. Below Yankton, South Dakota, where a narrow valley gave way to a flat expanse five to 18 miles wide, the Missouri and its various secondary channels, sandbars and the like "had a width of 1,000 to 10,000 feet during normal flow periods," historian Robert Kelley Schneiders wrote in 1999. During a flood, which usually came in April when snow melted in the Great Plains, or in June when it melted in the Rocky Mountains, the river could become a "foaming, misdirected monster" that covered the entire valley, sometimes with ice as well as water.

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