USGS Streamgage 10344400
Little Truckee River Ab Boca Reservoir near Truckee, CA
Little Truckee River Ab Boca Reservoir near Truckee, CA is USGS streamgage 10344400 in California, monitoring river discharge in hydrologic subbasin 16050102. It drains a watershed of about 146 square miles. Discharge records at this site go back to 1904. Typical flow runs near 93.4 cfs in July and 219.5 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 146 sq mi
- Gauge elevation
- 5,623 ft
- Subbasin (HUC-8)
- 16050102
- Coordinates
- 39.43571, -120.08434
- USGS site number
- 10344400
- Records begin
- 1904-04-14 (122 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 58 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 | 29.5 | 52 | 177.2 | |
| February | 31.3 | 70.6 | 170.7 | |
| March | 36.1 | 117.4 | 293.8 | |
| April | 45.8 | 219.5 | 709.2 | |
| May | 62.6 | 359.3 | 1,102.4 | |
| June | 35 | 184.5 | 691.3 | |
| July | 30.6 | 93.4 | 375.9 | |
| August | 27.5 | 58 | 236.7 | |
| September | 23.9 | 40.7 | 121.2 | |
| October | 26.3 | 40.1 | 141.7 | |
| November | 25.8 | 37.1 | 110.2 | |
| December | 28.3 | 43.7 | 142.2 |
All values in cubic feet per second (cfs).
Common questions
- When does Little Truckee River Ab Boca Reservoir near Truckee, CA normally run highest?
- May, on the long-term record. The median daily flow that month is about 359.3 cfs, against 37.1 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 Little Truckee River Ab Boca Reservoir near Truckee, CA?
- It depends on the month. In January, half of days historically fall near 52 cfs, with the middle 80% of days between 29.5 and 177.2 cfs. The month-by-month table on this page gives the full range.
- How long has Little Truckee River Ab Boca Reservoir near Truckee, CA been measured?
- Discharge records at USGS site 10344400 begin in 1904, about 122 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 Little Truckee River Ab Boca Reservoir near Truckee, CA?
- The gauge sits at 39.43571, -120.08434, in California, in hydrologic subbasin 16050102, at an elevation of about 5,623 feet, draining roughly 146 square miles.
- Can I use Little Truckee River Ab Boca Reservoir 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.