USGS Streamgage 11403200
NF Feather River below Rock C Diversion Dam, CA
NF Feather River below Rock C Diversion Dam, CA is USGS streamgage 11403200 in California, monitoring river discharge in hydrologic subbasin 18020121. It drains a watershed of about 1,773 square miles. Discharge records at this site go back to 1985. Typical flow runs near 227.5 cfs in July and 340.9 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 1,773 sq mi
- Subbasin (HUC-8)
- 18020121
- Coordinates
- 39.98016, -121.27691
- USGS site number
- 11403200
- Records begin
- 1985-09-30 (41 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 41 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 | 53.2 | 267.4 | 2,184.8 | |
| February | 53.1 | 285.6 | 3,279.7 | |
| March | 54.4 | 420.7 | 5,058.7 | |
| April | 54.8 | 340.9 | 5,293.3 | |
| May | 107.8 | 303 | 4,159.7 | |
| June | 108.4 | 247.7 | 1,198.2 | |
| July | 108.2 | 227.5 | 517.5 | |
| August | 107 | 238.2 | 513.9 | |
| September | 107 | 233.7 | 531 | |
| October | 106.1 | 204.5 | 595.8 | |
| November | 54.6 | 163.7 | 536.7 | |
| December | 53.4 | 189.9 | 1,077.3 |
All values in cubic feet per second (cfs).
Common questions
- When does NF Feather River below Rock C Diversion Dam, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 420.7 cfs, against 163.7 cfs in November, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for NF Feather River below Rock C Diversion Dam, CA?
- It depends on the month. In January, half of days historically fall near 267.4 cfs, with the middle 80% of days between 53.2 and 2,184.8 cfs. The month-by-month table on this page gives the full range.
- How long has NF Feather River below Rock C Diversion Dam, CA been measured?
- Discharge records at USGS site 11403200 begin in 1985, about 41 years, covering roughly 8,821 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is NF Feather River below Rock C Diversion Dam, CA?
- The gauge sits at 39.98016, -121.27691, in California, in hydrologic subbasin 18020121, draining roughly 1,773 square miles.
- Can I use NF Feather River below Rock C Diversion Dam, 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.
Other gauges in this subbasin
- Grizzly C below Diversion Dam, CA
- NF Feather River below Grizzly C, CA
- NF Feather River A Pulga, CA
- Philbrook C below Philbrook Dam near Butte Meadows, CA
- Wb Feather River below Hendricks Diversion Dam, CA
- NF Feather River near Prattville, CA
- Butt C below Almanor-Butt C Tu near Prattville, CA
- NF Feather River below Belden Dam, CA