USGS Streamgage 06482020
Big Sioux River at North Cliff Ave at Sioux Falls, SD
Big Sioux River at North Cliff Ave at Sioux Falls, SD is USGS streamgage 06482020, monitoring river discharge in hydrologic subbasin 10170203. It drains a watershed of about 4,662 square miles. Discharge records at this site go back to 1969. Typical flow runs near 474.5 cfs in July and 978.4 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 4,662 sq mi
- Gauge elevation
- 1,301 ft
- Subbasin (HUC-8)
- 10170203
- Coordinates
- 43.567, -96.71133
- USGS site number
- 06482020
- Records begin
- 1969-04-10 (57 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 55 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 | 17.2 | 106.9 | 385.2 | |
| February | 20.4 | 113.3 | 607 | |
| March | 82.2 | 589.8 | 3,451.6 | |
| April | 166.1 | 978.4 | 6,384 | |
| May | 126.9 | 998.9 | 3,658.1 | |
| June | 93.2 | 804.9 | 3,553.7 | |
| July | 42.2 | 474.5 | 2,508.7 | |
| August | 33.9 | 265.8 | 1,521 | |
| September | 28 | 183.9 | 1,170.7 | |
| October | 26.2 | 193.2 | 1,540.3 | |
| November | 34.4 | 231.1 | 918.4 | |
| December | 26.3 | 152.5 | 564.3 |
All values in cubic feet per second (cfs).