USGS Streamgage 13210986
W Hartley Gulch near Caldwell, ID
W Hartley Gulch near Caldwell, ID is USGS streamgage 13210986 in Idaho, monitoring river discharge in hydrologic subbasin 17050114. It drains a watershed of about 27 square miles. Discharge records at this site go back to 2016. Typical flow runs near 20.5 cfs in July and 14.8 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Idaho
- Drainage area
- 27 sq mi
- Subbasin (HUC-8)
- 17050114
- Coordinates
- 43.69961, -116.68569
- USGS site number
- 13210986
- Records begin
- 2016-11-28 (10 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 10 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 | 3.2 | 4 | 5.3 | |
| February | 3 | 3.7 | 5.9 | |
| March | 2.9 | 3.4 | 5.3 | |
| April | 9.6 | 14.8 | 22.2 | |
| May | 20.8 | 28.3 | 35.8 | |
| June | 17.2 | 24.6 | 35.2 | |
| July | 11.7 | 20.5 | 28.7 | |
| August | 17.2 | 25.9 | 34.6 | |
| September | 11.7 | 23.9 | 37.5 | |
| October | 4.8 | 12.1 | 18.8 | |
| November | 3.2 | 4.7 | 7.2 | |
| December | 3.4 | 4.4 | 5.8 |
All values in cubic feet per second (cfs).