Split Rock Creek at Corson, SD
River level and flood forecast · Minnehaha County
Normal1.9 ftas of Mon 12:45 PM
The river is 6.6 ft below flood stage (8.5 ft).
Flow: 22 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 16 ft |
| Moderate flood stage | 11 ft |
| Flood stage | 8.5 ft |
| Action stage | 7.5 ft |
| Record crest (September 12, 2019) | 19.01 ft |
What floods at each level
From the National Weather Service, highest first.
- 20 ft260th St begins to flood west of the bridge.
- 19 ftWater reaches the bottom of the bridge on McHardy Rd.
- 17 ftAspen Blvd near McHardy Rd may be flooded and water will be approaching a couple homes and outbuildings near Rushmore Dr. The bridge on 264th St is overtopped.
- 16 ftMcHardy Rd in Brandon may begin to flood.
- 14.5 ftIf not already flooded, Highway 11 south of Madison St begins to flood, as does 264th St.
- 12.5 ftThe athletic fields at Pioneer Park begin to flood as does much of the lower lying areas of the surrounding golf courses.
- 11 ftThe nursery near the mouth of Split Rock Creek begins flooding if the Big Sioux River is high enough to cause a backwater effect. Highway 11 between Highway 42 and Madison St can be flooded if Beaver Creek flows are also high.
- 9 ftThe parking lot at the racetrack may be flooded and the lower portions of McHardy Park begins to flood.
- 8.5 ftFlooding of the lower lying agricultural land begins.
- 5.5 ftPortions of the short walking trail in McHardy Park begins to flood.
Highest crests on record
- 19.01 ft — September 12, 2019
- 17.58 ft — May 8, 1993
- 16.18 ft — June 22, 2024
- 16.16 ft — June 17, 2014
- 15.5 ft — September 24, 2010
Recent crests: 3.06 ft (June 30, 2025) · 16.18 ft (June 22, 2024) · 9.91 ft (April 10, 2023) · 9.99 ft (July 6, 2022) · 3.07 ft (March 24, 2021)
Up and down the river, and nearby
- Big Sioux River at Sioux Falls N. Cliff Avenue, SD
- Silver Creek at Sioux Falls, SD
- Big Sioux River at Sioux Falls Maple Street, SD
- Big Sioux River at Sioux Falls Western Avenue, SD
- Skunk Creek at Sioux Falls, SD
- Willow Creek near Crooks, SD
- Big Sioux River near Dell Rapids, SD
- Skunk Creek near Hartford, SD
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (COSS2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.