Big Sioux River at Sioux Falls I-90

The past week

What floods at each level

• 21 ft

  The levees protecting Sioux Falls are overtopped resulting in significant to catastrophic flooding.

• 19.5 ft

  Levees downstream on diversion channel will be overtopped if all flow of around 37000 cfs is being diverted, potentially resulting in flooding in and around the airport in Sioux Falls.

• 19 ft

  Numerous homes and businesses west of Cliff Ave between I-90 and Renner are in danger of flooding.

• 18 ft

  60th St N in northern Sioux Falls is flooded, as are most east to west roads between I-90 and Dell Rapids.

• 17 ft

  Flooding begins to impact numerous roads and some homes and businesses between I-90 and Baltic, including in the Renner area.

• 16.5 ft

  Water begins to approach 60th St N in northern Sioux Falls and may flood the lowest portions.

• 15 ft

  Some farm buildings between Renner and Sioux Falls are threatened by high water and much of the broader floodplain north of I-90 is inundated.

• 13 ft

  Ditch Rd at the gauge location is flooded.

• 12 ft

  Agricultural land between 60th Street North and Interstate 90 begins to flood.

• 11 ft

  Minor flooding of some ditches and low spots upstream of Sioux Falls begins.

Highest crests on record

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