USGS Streamgage 06430850
Little Spearfish Creek near Lead, SD
Little Spearfish Creek near Lead, SD is USGS streamgage 06430850, monitoring river discharge in hydrologic subbasin 10120203. It drains a watershed of about 28 square miles. Discharge records at this site go back to 1988. Typical flow runs near 17.8 cfs in July and 16.8 cfs in April, with the higher of the two arriving in July.
Gauge details
- Drainage area
- 28 sq mi
- Gauge elevation
- 5,027 ft
- Subbasin (HUC-8)
- 10120203
- Coordinates
- 44.34969, -103.93591
- USGS site number
- 06430850
- Records begin
- 1988-10-01 (38 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 38 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 | 11.3 | 15.9 | 24.4 | |
| February | 10.9 | 15.6 | 23.6 | |
| March | 11.1 | 15.6 | 22.9 | |
| April | 12 | 16.8 | 24.7 | |
| May | 13.1 | 18.4 | 32.4 | |
| June | 13.6 | 18.8 | 31.9 | |
| July | 13 | 17.8 | 28.4 | |
| August | 12.9 | 17.6 | 27 | |
| September | 12.1 | 17.3 | 25.9 | |
| October | 12 | 16.9 | 25.5 | |
| November | 11.4 | 16.1 | 25.6 | |
| December | 11.6 | 15.9 | 25.8 |
All values in cubic feet per second (cfs).