USGS Streamgage 09213500
Big Sandy River near Farson, WY
Big Sandy River near Farson, WY is USGS streamgage 09213500 in Wyoming, monitoring river discharge in hydrologic subbasin 14040104. It drains a watershed of about 315 square miles. Discharge records at this site go back to 1914. Typical flow runs near 132.9 cfs in July and 49.4 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Wyoming
- Drainage area
- 315 sq mi
- Gauge elevation
- 6,808 ft
- Subbasin (HUC-8)
- 14040104
- Coordinates
- 42.3296, -109.5119
- USGS site number
- 09213500
- Records begin
- 1914-11-01 (112 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 111 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 | 3.1 | 11.1 | 18.6 | |
| February | 5.5 | 12.3 | 18.4 | |
| March | 12.1 | 19.6 | 41.4 | |
| April | 25.3 | 49.4 | 106.3 | |
| May | 89.1 | 196.3 | 437.7 | |
| June | 149.2 | 356.6 | 703.1 | |
| July | 43.7 | 132.9 | 344.5 | |
| August | 12.9 | 36.6 | 85.7 | |
| September | 9.9 | 23.4 | 54.3 | |
| October | 11.6 | 26.9 | 58.4 | |
| November | 11.2 | 19.2 | 35.5 | |
| December | 6 | 13.4 | 20.3 |
All values in cubic feet per second (cfs).