USGS Streamgage 12415135
St Joe River at Ramsdell near St Maries, ID
St Joe River at Ramsdell near St Maries, ID is USGS streamgage 12415135 in Idaho, monitoring river discharge in hydrologic subbasin 17010304. It drains a watershed of about 1,721 square miles. Discharge records at this site go back to 2009. Typical flow runs near 1,451.6 cfs in July and 6,350.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Idaho
- Drainage area
- 1,721 sq mi
- Gauge elevation
- 2,142 ft
- Subbasin (HUC-8)
- 17010304
- Coordinates
- 47.35222, -116.67556
- USGS site number
- 12415135
- Records begin
- 2009-10-01 (17 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 16 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 | 674.2 | 1,441.3 | 5,400 | |
| February | 866.5 | 1,927.2 | 8,616.8 | |
| March | 1,364.2 | 3,939.4 | 12,232.6 | |
| April | 2,964 | 6,350.7 | 12,619 | |
| May | 3,309.7 | 7,849.4 | 14,616.1 | |
| June | 1,824 | 3,710 | 11,171.3 | |
| July | 829 | 1,451.6 | 3,236.1 | |
| August | 393.6 | 787.4 | 1,147.5 | |
| September | 294.8 | 488.7 | 765.8 | |
| October | 329.1 | 540.7 | 1,197.5 | |
| November | 465.4 | 841.4 | 2,569.7 | |
| December | 494.4 | 1,102.9 | 3,172.3 |
All values in cubic feet per second (cfs).