USGS Streamgage 09171310
South Fork San Miguel River near Ophir, CO
South Fork San Miguel River near Ophir, CO is USGS streamgage 09171310 in Colorado, monitoring river discharge in hydrologic subbasin 14030003. It drains a watershed of about 42 square miles. Discharge records at this site go back to 2011. Typical flow runs near 83.2 cfs in July and 39.7 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Colorado
- Drainage area
- 42 sq mi
- Gauge elevation
- 8,490 ft
- Subbasin (HUC-8)
- 14030003
- Coordinates
- 37.87311, -107.89444
- USGS site number
- 09171310
- Records begin
- 2011-11-01 (15 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 15 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 | 18.5 | 27.9 | 35.2 | |
| February | 18.2 | 28.1 | 37.5 | |
| March | 14.9 | 29.6 | 47.5 | |
| April | 25.1 | 39.7 | 74.1 | |
| May | 51 | 92.5 | 166.2 | |
| June | 58.3 | 178.6 | 402.7 | |
| July | 38.8 | 83.2 | 236.7 | |
| August | 30.4 | 55.2 | 95 | |
| September | 26.8 | 38.5 | 83.4 | |
| October | 26.6 | 32.5 | 56.5 | |
| November | 20.1 | 26.7 | 39.4 | |
| December | 18.5 | 26.1 | 33.2 |
All values in cubic feet per second (cfs).