USGS Streamgage 09166500
Dolores River at Dolores, CO
Dolores River at Dolores, CO is USGS streamgage 09166500 in Colorado, monitoring river discharge in hydrologic subbasin 14030002. It drains a watershed of about 504 square miles. Discharge records at this site go back to 1895. Typical flow runs near 286.7 cfs in July and 607.5 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Colorado
- Drainage area
- 504 sq mi
- Gauge elevation
- 6,957 ft
- Subbasin (HUC-8)
- 14030002
- Coordinates
- 37.4725, -108.4976
- USGS site number
- 09166500
- Records begin
- 1895-10-01 (131 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 131 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 | 29.5 | 45.6 | 76.6 | |
| February | 31.8 | 50.8 | 84.2 | |
| March | 49 | 97.7 | 264.1 | |
| April | 219 | 607.5 | 1,395.1 | |
| May | 620.4 | 1,489.7 | 3,031.9 | |
| June | 318.7 | 1,068.9 | 2,537 | |
| July | 113 | 286.7 | 793.7 | |
| August | 84.1 | 195.9 | 386.3 | |
| September | 52.3 | 128.2 | 315.2 | |
| October | 43.1 | 89.5 | 243 | |
| November | 36.7 | 63.7 | 134.4 | |
| December | 30.4 | 49.4 | 88.7 |
All values in cubic feet per second (cfs).