USGS Streamgage 11436510
Oyster C near Kirkwood, CA
Oyster C near Kirkwood, CA is USGS streamgage 11436510 in California, monitoring river discharge in hydrologic subbasin 18020129. It drains a watershed of about 1 square miles. Discharge records at this site go back to 2010. Typical flow runs near 16.9 cfs in July and 5.4 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- California
- Drainage area
- 1 sq mi
- Gauge elevation
- 7,120 ft
- Subbasin (HUC-8)
- 18020129
- Coordinates
- 38.67889, -120.11639
- USGS site number
- 11436510
- Records begin
- 2010-09-30 (16 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 | — | 1.6 | — | |
| February | — | 3.9 | — | |
| March | — | 2 | — | |
| April | 1.6 | 5.4 | 13.5 | |
| May | 10.1 | 19.5 | 24 | |
| June | 15.8 | 22 | 29.8 | |
| July | 12.6 | 16.9 | 28.3 | |
| August | 8.2 | 11.3 | 19.6 | |
| September | 4.7 | 6.7 | 13.4 | |
| October | 2.5 | 3.8 | 9.9 | |
| November | — | 2.6 | — | |
| December | — | 3 | — |
All values in cubic feet per second (cfs).
Common questions
- When does Oyster C near Kirkwood, CA normally run highest?
- June, on the long-term record. The median daily flow that month is about 22 cfs, against 1.6 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Oyster C near Kirkwood, CA?
- It depends on the month. In April, half of days historically fall near 5.4 cfs, with the middle 80% of days between 1.6 and 13.5 cfs. The month-by-month table on this page gives the full range.
- How long has Oyster C near Kirkwood, CA been measured?
- Discharge records at USGS site 11436510 begin in 2010, about 16 years, covering roughly 3,415 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Oyster C near Kirkwood, CA?
- The gauge sits at 38.67889, -120.11639, in California, in hydrologic subbasin 18020129, at an elevation of about 7,120 feet, draining roughly 1 square miles.
- Can I use Oyster C near Kirkwood, 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.