USGS Streamgage 09379500
San Juan River near Bluff, UT
San Juan River near Bluff, UT is USGS streamgage 09379500 in Utah, monitoring river discharge in hydrologic subbasin 14080205. It drains a watershed of about 23,000 square miles. Discharge records at this site go back to 1914. Typical flow runs near 1,365.6 cfs in July and 1,924.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Utah
- Drainage area
- 23,000 sq mi
- Gauge elevation
- 4,068 ft
- Subbasin (HUC-8)
- 14080205
- Coordinates
- 37.15068, -109.86669
- USGS site number
- 09379500
- Records begin
- 1914-10-30 (112 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 112 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 | 467.8 | 802.6 | 2,128.7 | |
| February | 562.5 | 925.3 | 2,666.9 | |
| March | 617.9 | 1,177.6 | 3,627.4 | |
| April | 560.7 | 1,924.3 | 6,960 | |
| May | 1,015.6 | 3,629.7 | 9,598.4 | |
| June | 1,065.6 | 4,121.3 | 10,466.3 | |
| July | 381.5 | 1,365.6 | 5,550.3 | |
| August | 291.1 | 1,019.4 | 3,419.7 | |
| September | 327.9 | 887.1 | 3,258.3 | |
| October | 503.3 | 957.1 | 2,595.8 | |
| November | 589.8 | 892.3 | 2,037.3 | |
| December | 502.6 | 802.7 | 1,936.1 |
All values in cubic feet per second (cfs).