USGS Streamgage 06479500
Big Sioux River at Watertown, SD
Big Sioux River at Watertown, SD is USGS streamgage 06479500, monitoring river discharge in hydrologic subbasin 10170201. It drains a watershed of about 806 square miles. Discharge records at this site go back to 1945. Typical flow runs near 16 cfs in July and 70.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 806 sq mi
- Gauge elevation
- 1,715 ft
- Subbasin (HUC-8)
- 10170201
- Coordinates
- 44.94246, -97.14619
- USGS site number
- 06479500
- Records begin
- 1945-10-01 (81 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 81 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 | 0 | 0.6 | 22.2 | |
| February | 0 | 0.8 | 23.1 | |
| March | 0.1 | 13.2 | 210.8 | |
| April | 3.5 | 70.8 | 586.5 | |
| May | 3.4 | 57.7 | 319.9 | |
| June | 2.9 | 32 | 218.1 | |
| July | 0.2 | 16 | 154.8 | |
| August | 0 | 3.2 | 114.2 | |
| September | 0 | 1.8 | 47 | |
| October | 0.1 | 2.2 | 50.9 | |
| November | 0.1 | 2.3 | 44 | |
| December | 0 | 1.3 | 30.5 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- Big Sioux River at Broadway at Watertown, SD
- Willow Creek near Watertown, SD
- Big Sioux River below Watertown, SD
- Big Sioux River near Castlewood, SD
- Big Sioux River near Florence, SD
- Big Sioux River near Watertown, SD
- Lake Kampeska at Water Plant at Watertown, SD
- Big Sioux River at Lake Kampeska near Watertown, SD