USGS Streamgage 11109800
Piru Creek below Santa Felicia Dam, CA
Piru Creek below Santa Felicia Dam, CA is USGS streamgage 11109800 in California, monitoring river discharge in hydrologic subbasin 18070102. It drains a watershed of about 425 square miles. Discharge records at this site go back to 1955. Typical flow runs near 7.7 cfs in July and 7 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- California
- Drainage area
- 425 sq mi
- Gauge elevation
- 861 ft
- Subbasin (HUC-8)
- 18070102
- Coordinates
- 34.46027, -118.75202
- USGS site number
- 11109800
- Records begin
- 1955-10-01 (71 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 49 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 | 1.8 | 6.1 | 24.4 | |
| February | 1.4 | 6.4 | 61.7 | |
| March | 3.2 | 6.8 | 100.4 | |
| April | 3.8 | 7 | 97 | |
| May | 4.5 | 7.3 | 100.3 | |
| June | 4.8 | 8.2 | 105.1 | |
| July | 4.5 | 7.7 | 197.4 | |
| August | 4.5 | 7.7 | 226.9 | |
| September | 4.8 | 89 | 365.4 | |
| October | 5.9 | 83.2 | 344.1 | |
| November | 4.8 | 8.1 | 154.6 | |
| December | 4.4 | 7 | 36.7 |
All values in cubic feet per second (cfs).
Common questions
- When does Piru Creek below Santa Felicia Dam, CA normally run highest?
- September, on the long-term record. The median daily flow that month is about 89 cfs, against 6.1 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 Piru Creek below Santa Felicia Dam, CA?
- It depends on the month. In January, half of days historically fall near 6.1 cfs, with the middle 80% of days between 1.8 and 24.4 cfs. The month-by-month table on this page gives the full range.
- How long has Piru Creek below Santa Felicia Dam, CA been measured?
- Discharge records at USGS site 11109800 begin in 1955, about 71 years, covering roughly 8,211 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Piru Creek below Santa Felicia Dam, CA?
- The gauge sits at 34.46027, -118.75202, in California, in hydrologic subbasin 18070102, at an elevation of about 861 feet, draining roughly 425 square miles.
- Can I use Piru Creek below Santa Felicia 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.