Carte topographique Mississippi River
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À propos de cette carte
Nom : Carte topographique Mississippi River, altitude, relief.
Lieu : Mississippi River, United States (29.15784 -95.24694 47.49749 -89.09884)
Altitude moyenne : 344 m
Altitude minimum : -3 m
Altitude maximum : 1.927 m
The uppermost lock and dam on the Upper Mississippi River is the Upper St. Anthony Falls Lock and Dam in Minneapolis. Above the dam, the river's elevation is 799 feet (244 m). Below the dam, the river's elevation is 750 feet (230 m). This 49-foot (15 m) drop is the largest of all the Mississippi River locks and dams. The origin of the dramatic drop is a waterfall preserved adjacent to the lock under an apron of concrete. Saint Anthony Falls is the only true waterfall on the entire Mississippi River. The water elevation continues to drop steeply as it passes through the gorge carved by the waterfall.
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