USGS Streamgage 06407500
Spring Creek near Keystone, SD
Spring Creek near Keystone, SD is USGS streamgage 06407500, monitoring river discharge in hydrologic subbasin 10120109. It drains a watershed of about 163 square miles. Discharge records at this site go back to 1945. Typical flow runs near 14.6 cfs in July and 15.1 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 163 sq mi
- Gauge elevation
- 3,901 ft
- Subbasin (HUC-8)
- 10120109
- Coordinates
- 43.97871, -103.34605
- USGS site number
- 06407500
- Records begin
- 1945-06-15 (81 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 40 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 | 0.2 | 4.5 | 13.4 | |
| February | 0.7 | 4.7 | 13.7 | |
| March | 2.4 | 9.2 | 24.3 | |
| April | 5.4 | 15.1 | 53.3 | |
| May | 6 | 25.3 | 171.5 | |
| June | 3.8 | 24.2 | 212 | |
| July | 0.7 | 14.6 | 95.6 | |
| August | 0 | 8.1 | 61.1 | |
| September | 0 | 4.3 | 27.8 | |
| October | 0 | 6 | 30.2 | |
| November | 0.1 | 6.2 | 26.6 | |
| December | 0.1 | 5 | 16.9 |
All values in cubic feet per second (cfs).