USGS Streamgage 06482000
Big Sioux River at Sioux Falls, SD
Big Sioux River at Sioux Falls, SD is USGS streamgage 06482000, monitoring river discharge in hydrologic subbasin 10170203. It drains a watershed of about 4,642 square miles. Discharge records at this site go back to 1943. Typical flow runs near 265.4 cfs in July and 393 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 4,642 sq mi
- Gauge elevation
- 1,422 ft
- Subbasin (HUC-8)
- 10170203
- Coordinates
- 43.50109, -96.74838
- USGS site number
- 06482000
- Records begin
- 1943-09-01 (83 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 83 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 6.6 | 24.5 | 120.7 | |
| February | 4.8 | 24.4 | 321.5 | |
| March | 23 | 173.3 | 1,726.8 | |
| April | 55 | 393 | 2,156.7 | |
| May | 67.5 | 348.1 | 1,174 | |
| June | 43.5 | 368.9 | 1,158.3 | |
| July | 31.1 | 265.4 | 807.5 | |
| August | 19.9 | 149.1 | 573.2 | |
| September | 13.5 | 91.8 | 433.8 | |
| October | 15.3 | 92.5 | 440.8 | |
| November | 11.9 | 77.3 | 283.9 | |
| December | 11.7 | 40.7 | 166.3 |
All values in cubic feet per second (cfs).