USGS Streamgage 11451715
Bear C Ab Holsten Chimney Cyn near Rumsey, CA
Bear C Ab Holsten Chimney Cyn near Rumsey, CA is USGS streamgage 11451715 in California, monitoring river discharge in hydrologic subbasin 18020116. It drains a watershed of about 95 square miles. Discharge records at this site go back to 1997. Typical flow runs near 1.7 cfs in July and 28.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 95 sq mi
- Gauge elevation
- 819 ft
- Subbasin (HUC-8)
- 18020116
- Coordinates
- 38.95765, -122.34273
- USGS site number
- 11451715
- Records begin
- 1997-11-20 (29 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 29 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 | 2.9 | 30.5 | 317.1 | |
| February | 5.1 | 43.6 | 548 | |
| March | 5.1 | 46.5 | 252.7 | |
| April | 5.3 | 28.3 | 98.1 | |
| May | 1.6 | 8.9 | 51.3 | |
| June | 0.2 | 3.3 | 21 | |
| July | 0 | 1.7 | 6.2 | |
| August | 0 | 1.3 | 3.2 | |
| September | 0.1 | 1.4 | 2.7 | |
| October | 0.6 | 2.1 | 4.8 | |
| November | 1.3 | 3.2 | 14.1 | |
| December | 2.1 | 7.7 | 234.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Bear C Ab Holsten Chimney Cyn near Rumsey, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 46.5 cfs, against 1.3 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Bear C Ab Holsten Chimney Cyn near Rumsey, CA?
- It depends on the month. In January, half of days historically fall near 30.5 cfs, with the middle 80% of days between 2.9 and 317.1 cfs. The month-by-month table on this page gives the full range.
- How long has Bear C Ab Holsten Chimney Cyn near Rumsey, CA been measured?
- Discharge records at USGS site 11451715 begin in 1997, about 29 years, covering roughly 8,574 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Bear C Ab Holsten Chimney Cyn near Rumsey, CA?
- The gauge sits at 38.95765, -122.34273, in California, in hydrologic subbasin 18020116, at an elevation of about 819 feet, draining roughly 95 square miles.
- Can I use Bear C Ab Holsten Chimney Cyn near Rumsey, 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.