Upper Rhine

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Upper Rhine (German: Oberrhein [ˈoːbɐˌʁaɪn] ; French: Rhin Supérieur) is the section of the Rhine between the Middle Bridge in Basel, Switzerland, and the Rhine knee in Bingen, Germany. Representing kilometres 167 to 529 of the river it is surrounded by the Upper Rhine Plain (Oberrheinische Tiefebene). Most of its upper section marks the France–Germany border. The Upper Rhine is one of four sections of the river between Lake Constance and the North Sea, and is succeeded downstream by the Middle Rhine and Lower Rhine; only the High Rhine and Alpine Rhine lie above it. The countries and states along the Upper Rhine are Switzerland, France (Alsace) and the German states of Baden-Württemberg, Rhineland-Palatinate and Hesse. The largest cities along the river are Basel, Mulhouse, Strasbourg, Karlsruhe, Mannheim, Ludwigshafen and Mainz. The Upper Rhine was straightened between 1817 and 1876 by Johann Gottfried Tulla and made navigable between 1928 and 1977. The Treaty of Versailles allows France to use the Upper Rhine for hydroelectricity in the Grand Canal d'Alsace. On the left bank are the French region of Alsace and the German state of Rhineland-Palatinate; on the right bank are the German states of Baden-Württemberg and Hesse. The first few kilometres are in the Swiss city of Basel.