USGS Streamgage 06428500
Belle Fourche River at Wy-Sd State Line
Belle Fourche River at Wy-Sd State Line is USGS streamgage 06428500, monitoring river discharge in hydrologic subbasin 10120202. It drains a watershed of about 3,233 square miles. Discharge records at this site go back to 1946. Typical flow runs near 84.1 cfs in July and 92.2 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 3,233 sq mi
- Gauge elevation
- 3,110 ft
- Subbasin (HUC-8)
- 10120202
- Coordinates
- 44.74883, -104.0517
- USGS site number
- 06428500
- Records begin
- 1946-12-01 (80 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 | 1.5 | 14.2 | 49.4 | |
| February | 4.1 | 21.1 | 85.4 | |
| March | 20.3 | 71.3 | 397.9 | |
| April | 29.1 | 92.2 | 407.6 | |
| May | 26.7 | 100 | 507.2 | |
| June | 17.2 | 99.4 | 436.4 | |
| July | 19.9 | 84.1 | 167.5 | |
| August | 16.2 | 69.2 | 126.1 | |
| September | 3.1 | 29.6 | 80.8 | |
| October | 2.5 | 20.4 | 63 | |
| November | 6.7 | 21.3 | 49.3 | |
| December | 4.2 | 15.8 | 38.2 |
All values in cubic feet per second (cfs).