This river is crossed by the world’s longest single-span bridge for pedestrians and cyclists near Huningue (“oo-NANG”). Many hydroelectric facilities lie along a “Grand Canal” parallel to this river near the town of Kembs (“KEHMSS”). This river, whose artificial mouth is the “New Waterway,” turned red and experienced mass fish death after a fire at the Sandoz chemical works. Human settlement of this river’s peatland delta likely caused its (*) Lek distributary to form. Distance markers along this river count kilometers from the bridge at Lake Constance. A “land” named for this river is a major industrial (10[1])area near where the Ruhr flows into this (10[1])river, including the cities of Mainz (“MIGHNTS”) and Bonn. For 10 points each, name this river that forms much of the Franco-German border before flowing into the North Sea. ■END■