USGS Streamgage 11176500
Arroyo Valle near Livermore, CA
Arroyo Valle near Livermore, CA is USGS streamgage 11176500 in California, monitoring river discharge in hydrologic subbasin 18050004. It drains a watershed of about 147 square miles. Discharge records at this site go back to 1912. Typical flow runs near 7.4 cfs in July and 2.1 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- California
- Drainage area
- 147 sq mi
- Gauge elevation
- 513 ft
- Subbasin (HUC-8)
- 18050004
- Coordinates
- 37.62323, -121.7588
- USGS site number
- 11176500
- Records begin
- 1912-04-01 (114 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 | 0.3 | 1.4 | 20.2 | |
| February | 0.4 | 2.7 | 302.3 | |
| March | 0.4 | 2.3 | 141.6 | |
| April | 0.3 | 2.1 | 15.6 | |
| May | 0.2 | 3.1 | 12.6 | |
| June | 0.1 | 5.7 | 17.3 | |
| July | 0.1 | 7.4 | 35.1 | |
| August | 0.1 | 4.8 | 31.5 | |
| September | 0.2 | 4.7 | 21.1 | |
| October | 0.2 | 2.5 | 17.1 | |
| November | 0.3 | 2.9 | 14.5 | |
| December | 0.4 | 1.4 | 12.6 |
All values in cubic feet per second (cfs).
Common questions
- When does Arroyo Valle near Livermore, CA normally run highest?
- July, on the long-term record. The median daily flow that month is about 7.4 cfs, against 1.4 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 Arroyo Valle near Livermore, CA?
- It depends on the month. In January, half of days historically fall near 1.4 cfs, with the middle 80% of days between 0.3 and 20.2 cfs. The month-by-month table on this page gives the full range.
- How long has Arroyo Valle near Livermore, CA been measured?
- Discharge records at USGS site 11176500 begin in 1912, about 114 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 Arroyo Valle near Livermore, CA?
- The gauge sits at 37.62323, -121.7588, in California, in hydrologic subbasin 18050004, at an elevation of about 513 feet, draining roughly 147 square miles.
- Can I use Arroyo Valle near Livermore, 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.