Mississippi River topographic map

Click on the map to display elevation.

Mississippi River

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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About this map

Name: Mississippi River topographic map, elevation, terrain.

Location: Mississippi River, New Boston, Louisa County, Iowa, United States (41.15847 -91.01444 41.16618 -90.99264)

Average elevation: 169 m

Minimum elevation: 159 m

Maximum elevation: 183 m