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Geography

The history and economic growth of Minneapolis are linked to water, the city's defining physical characteristic. Long periods of glaciation and interglacial melt carved several riverbeds through what is now Minneapolis. During the last glacial period, around 10,000 years ago, ice buried in these ancient river channels melted, resulting in basins that filled with water to become the lakes of Minneapolis. Meltwater from Lake Agassiz fed the Glacial River Warren, which created a large waterfall that eroded upriver past the confluence of the Mississippi River, where it left a 75-foot (23-meter) drop in the Mississippi. This site is located in what is now downtown Saint Paul. The new waterfall, later called Saint Anthony Falls, in turn, eroded up the Mississippi about eight miles (13 kilometers) to its present location, carving the Mississippi River gorge as it moved upstream. Minnehaha Falls also developed during this period via similar processes.

Minneapolis is sited above an artesian aquifer and on flat terrain. Its total area is 59 square miles (152.8 square kilometers) of which six percent is covered by water. The city has a 12-mile (19 km) segment of the Mississippi River, four streams, and 17 waterbodies—13 of them lakes, with 24 miles (39 km) of lake shoreline.

A 1959 report by the US Soil Conservation Service listed Minneapolis's elevation above mean sea level as 830 feet (250 meters). The city's lowest elevation of 687 feet (209 m) above sea level is near the confluence of Minnehaha Creek with the Mississippi River. Sources disagree on the exact location and elevation of the city's highest point, which is cited as being between 967 and 985 feet (295 and 300 m) above sea level.