USGS Streamgage 11179000
Alameda C near Niles, CA
Alameda C near Niles, CA is USGS streamgage 11179000 in California, monitoring river discharge in hydrologic subbasin 18050004. It drains a watershed of about 633 square miles. Discharge records at this site go back to 1891. Typical flow runs near 31.3 cfs in July and 52.4 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 633 sq mi
- Gauge elevation
- 86 ft
- Subbasin (HUC-8)
- 18050004
- Coordinates
- 37.58712, -121.96075
- USGS site number
- 11179000
- Records begin
- 1891-01-01 (135 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 57 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 | 20.5 | 55.4 | 783 | |
| February | 22.9 | 68.6 | 1,397.9 | |
| March | 27.5 | 79.4 | 959 | |
| April | 20.2 | 52.4 | 333.9 | |
| May | 16.4 | 34.7 | 127.4 | |
| June | 13.6 | 33.5 | 65.9 | |
| July | 12.3 | 31.3 | 57.3 | |
| August | 11.2 | 31.1 | 56.7 | |
| September | 7.9 | 26.7 | 52 | |
| October | 8 | 23.5 | 51.5 | |
| November | 12.6 | 30.3 | 98.3 | |
| December | 17.3 | 43.4 | 298.7 |
All values in cubic feet per second (cfs).
Common questions
- When does Alameda C near Niles, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 79.4 cfs, against 23.5 cfs in October, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Alameda C near Niles, CA?
- It depends on the month. In January, half of days historically fall near 55.4 cfs, with the middle 80% of days between 20.5 and 783 cfs. The month-by-month table on this page gives the full range.
- How long has Alameda C near Niles, CA been measured?
- Discharge records at USGS site 11179000 begin in 1891, about 135 years, covering roughly 9,126 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Alameda C near Niles, CA?
- The gauge sits at 37.58712, -121.96075, in California, in hydrologic subbasin 18050004, at an elevation of about 86 feet, draining roughly 633 square miles.
- Can I use Alameda C near Niles, 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.