USGS Streamgage 10340500
Prosser C below Prosser C Dam near Truckee, CA
Prosser C below Prosser C Dam near Truckee, CA is USGS streamgage 10340500 in California, monitoring river discharge in hydrologic subbasin 16050102. It drains a watershed of about 53 square miles. Discharge records at this site go back to 1942. Typical flow runs near 45.4 cfs in July and 93.6 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 53 sq mi
- Gauge elevation
- 5,620 ft
- Subbasin (HUC-8)
- 16050102
- Coordinates
- 39.37324, -120.13159
- USGS site number
- 10340500
- Records begin
- 1942-10-01 (84 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 63 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 | 11.1 | 34.3 | 133.6 | |
| February | 15.7 | 42.5 | 135.7 | |
| March | 26.6 | 80.6 | 199.2 | |
| April | 23.2 | 93.6 | 301.7 | |
| May | 17.1 | 110.2 | 479.4 | |
| June | 12.7 | 66.8 | 240.2 | |
| July | 8.1 | 45.4 | 160.8 | |
| August | 5.9 | 45.4 | 122.8 | |
| September | 5.6 | 81.9 | 212.8 | |
| October | 6.4 | 62.1 | 186 | |
| November | 9.1 | 24.9 | 83.7 | |
| December | 9.9 | 29.3 | 116.6 |
All values in cubic feet per second (cfs).
Common questions
- When does Prosser C below Prosser C Dam near Truckee, CA normally run highest?
- May, on the long-term record. The median daily flow that month is about 110.2 cfs, against 24.9 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 Prosser C below Prosser C Dam near Truckee, CA?
- It depends on the month. In January, half of days historically fall near 34.3 cfs, with the middle 80% of days between 11.1 and 133.6 cfs. The month-by-month table on this page gives the full range.
- How long has Prosser C below Prosser C Dam near Truckee, CA been measured?
- Discharge records at USGS site 10340500 begin in 1942, about 84 years, covering roughly 8,778 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Prosser C below Prosser C Dam near Truckee, CA?
- The gauge sits at 39.37324, -120.13159, in California, in hydrologic subbasin 16050102, at an elevation of about 5,620 feet, draining roughly 53 square miles.
- Can I use Prosser C below Prosser C Dam near Truckee, 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.