Transportation
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The Missouri River of today is quite different from the wide, low-moving river encountered when the Corps of Discovery navigated its torrent waters in 1804. Lewis and Clark fought the strong current, using ropes to pull the boat upstream. By the fall of 1804, when the expedition passed through here, the surging spring and summer flows had receded. Today six hydroelectric dams, four of them in South Dakota, control the Missouri River, producing both positive and negative results that will continue to affect the water flow as long as the dams exist.
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South Dakota · United States
