USGS Streamgage 11158600
San Benito River below Hospital Rd Bridge near Hollister, CA
San Benito River below Hospital Rd Bridge near Hollister, CA is USGS streamgage 11158600 in California, monitoring river discharge in hydrologic subbasin 18060002. It drains a watershed of about 596 square miles. Discharge records at this site go back to 1970. Typical flow runs near 0 cfs in July and 2.2 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 596 sq mi
- Gauge elevation
- 295 ft
- Subbasin (HUC-8)
- 18060002
- Coordinates
- 36.81675, -121.39268
- USGS site number
- 11158600
- Records begin
- 1970-10-01 (56 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 56 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 | 1.7 | 111.6 | |
| February | 0 | 3.1 | 271.3 | |
| March | 0 | 6.8 | 261.1 | |
| April | 0 | 2.2 | 96.1 | |
| May | 0 | 0 | 16.7 | |
| June | 0 | 0 | 15.8 | |
| July | 0 | 0 | 15 | |
| August | 0 | 0 | 13.2 | |
| September | 0 | 0 | 12.9 | |
| October | 0 | 0 | 7.5 | |
| November | 0 | 0 | 9.6 | |
| December | 0 | 0 | 20.5 |
All values in cubic feet per second (cfs).
Common questions
- When does San Benito River below Hospital Rd Bridge near Hollister, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 6.8 cfs, against 0 cfs in May, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for San Benito River below Hospital Rd Bridge near Hollister, CA?
- It depends on the month. In January, half of days historically fall near 1.7 cfs, with the middle 80% of days between 0 and 111.6 cfs. The month-by-month table on this page gives the full range.
- How long has San Benito River below Hospital Rd Bridge near Hollister, CA been measured?
- Discharge records at USGS site 11158600 begin in 1970, about 56 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 San Benito River below Hospital Rd Bridge near Hollister, CA?
- The gauge sits at 36.81675, -121.39268, in California, in hydrologic subbasin 18060002, at an elevation of about 295 feet, draining roughly 596 square miles.
- Can I use San Benito River below Hospital Rd Bridge near Hollister, 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.