USGS Streamgage 09211200
Green River below Fontenelle Reservoir, WY
Green River below Fontenelle Reservoir, WY is USGS streamgage 09211200 in Wyoming, monitoring river discharge in hydrologic subbasin 14040103. It drains a watershed of about 4,197 square miles. Discharge records at this site go back to 1963. Typical flow runs near 1,831 cfs in July and 1,255.3 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Wyoming
- Drainage area
- 4,197 sq mi
- Gauge elevation
- 6,400 ft
- Subbasin (HUC-8)
- 14040103
- Coordinates
- 42.02097, -110.04981
- USGS site number
- 09211200
- Records begin
- 1963-12-01 (63 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 63 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 | 457.7 | 910.3 | 1,242.3 | |
| February | 475.6 | 903 | 1,293.1 | |
| March | 518.7 | 937.4 | 1,404.8 | |
| April | 599 | 1,255.3 | 2,294.7 | |
| May | 747.9 | 1,775.5 | 4,553.2 | |
| June | 788.8 | 3,453.7 | 8,301.3 | |
| July | 734.5 | 1,831 | 6,329 | |
| August | 632.5 | 1,333.5 | 2,356.8 | |
| September | 565.3 | 1,025.9 | 1,498.3 | |
| October | 530.4 | 935.7 | 1,387.4 | |
| November | 500.5 | 922.5 | 1,243.7 | |
| December | 447.1 | 894.8 | 1,221.9 |
All values in cubic feet per second (cfs).