USGS Streamgage 11441800
Silver C below Junction Dam near Pollock Pines, CA
Silver C below Junction Dam near Pollock Pines, CA is USGS streamgage 11441800 in California, monitoring river discharge in hydrologic subbasin 18020129. It drains a watershed of about 146 square miles. Discharge records at this site go back to 1987. Typical flow runs near 21 cfs in July and 11.1 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- California
- Drainage area
- 146 sq mi
- Subbasin (HUC-8)
- 18020129
- Coordinates
- 38.85213, -120.45714
- USGS site number
- 11441800
- Records begin
- 1987-10-01 (39 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 38 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 | 6.4 | 10.4 | 21.8 | |
| February | 6.6 | 10.7 | 22.3 | |
| March | 6.7 | 10.9 | 28.2 | |
| April | 7 | 11.1 | 45.5 | |
| May | 10.4 | 20.9 | 72.1 | |
| June | 10.9 | 20.9 | 57 | |
| July | 10.9 | 21 | 37 | |
| August | 11 | 17.6 | 22.7 | |
| September | 11 | 16.5 | 22 | |
| October | 6.2 | 16.1 | 22.3 | |
| November | 6.1 | 10.6 | 22 | |
| December | 6.1 | 10.3 | 22 |
All values in cubic feet per second (cfs).
Common questions
- When does Silver C below Junction Dam near Pollock Pines, CA normally run highest?
- July, on the long-term record. The median daily flow that month is about 21 cfs, against 10.3 cfs in December, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Silver C below Junction Dam near Pollock Pines, CA?
- It depends on the month. In January, half of days historically fall near 10.4 cfs, with the middle 80% of days between 6.4 and 21.8 cfs. The month-by-month table on this page gives the full range.
- How long has Silver C below Junction Dam near Pollock Pines, CA been measured?
- Discharge records at USGS site 11441800 begin in 1987, about 39 years, covering roughly 8,247 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Silver C below Junction Dam near Pollock Pines, CA?
- The gauge sits at 38.85213, -120.45714, in California, in hydrologic subbasin 18020129, draining roughly 146 square miles.
- Can I use Silver C below Junction Dam near Pollock Pines, CA data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.