USGS Streamgage 11179100
Alameda C near Fremont, CA
Alameda C near Fremont, CA is USGS streamgage 11179100 in California, monitoring river discharge in hydrologic subbasin 18050004. It drains a watershed of about 638 square miles. Discharge records at this site go back to 2012. Typical flow runs near 5.9 cfs in July and 16 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 638 sq mi
- Gauge elevation
- 24 ft
- Subbasin (HUC-8)
- 18050004
- Coordinates
- 37.5666, -122.00163
- USGS site number
- 11179100
- Records begin
- 2012-12-04 (14 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 13 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 | 0.5 | 17.6 | 2,453.1 | |
| February | 1.6 | 24.9 | 2,167.1 | |
| March | 2.1 | 28.1 | 1,496 | |
| April | 1.4 | 16 | 222.1 | |
| May | 1 | 7.3 | 51.3 | |
| June | 0.7 | 10.2 | 29.7 | |
| July | 0.2 | 5.9 | 24.6 | |
| August | 0 | 6.2 | 24 | |
| September | 0.1 | 6.3 | 25.4 | |
| October | 0.1 | 5.2 | 122.7 | |
| November | 0.1 | 4.6 | 65.2 | |
| December | 0.3 | 5.6 | 726.6 |
All values in cubic feet per second (cfs).
Common questions
- When does Alameda C near Fremont, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 28.1 cfs, against 4.6 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 Alameda C near Fremont, CA?
- It depends on the month. In January, half of days historically fall near 17.6 cfs, with the middle 80% of days between 0.5 and 2,453.1 cfs. The month-by-month table on this page gives the full range.
- How long has Alameda C near Fremont, CA been measured?
- Discharge records at USGS site 11179100 begin in 2012, about 14 years, covering roughly 4,988 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Alameda C near Fremont, CA?
- The gauge sits at 37.5666, -122.00163, in California, in hydrologic subbasin 18050004, at an elevation of about 24 feet, draining roughly 638 square miles.
- Can I use Alameda C near Fremont, 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.