USGS Streamgage 06480000
Big Sioux River near Brookings, SD
Big Sioux River near Brookings, SD is USGS streamgage 06480000, monitoring river discharge in hydrologic subbasin 10170203. It drains a watershed of about 3,338 square miles. Discharge records at this site go back to 1953. Typical flow runs near 162.1 cfs in July and 430.1 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 3,338 sq mi
- Gauge elevation
- 1,555 ft
- Subbasin (HUC-8)
- 10170203
- Coordinates
- 44.18025, -96.7495
- USGS site number
- 06480000
- Records begin
- 1953-08-01 (73 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 73 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 | 2 | 25.5 | 167.5 | |
| February | 1.2 | 24.7 | 275.1 | |
| March | 12.9 | 219.1 | 1,754.8 | |
| April | 75.3 | 430.1 | 3,107.7 | |
| May | 49.2 | 382.5 | 1,906.5 | |
| June | 35.6 | 310.1 | 1,690.3 | |
| July | 20 | 162.1 | 1,264.2 | |
| August | 10.9 | 84.9 | 857.6 | |
| September | 7 | 66.6 | 632.1 | |
| October | 10.7 | 74.7 | 613.6 | |
| November | 13.4 | 69.9 | 423.4 | |
| December | 5.3 | 48.5 | 256 |
All values in cubic feet per second (cfs).