USGS Streamgage 10312150
Carson River below Lahontan Reservoir near Fallon, NV
Carson River below Lahontan Reservoir near Fallon, NV is USGS streamgage 10312150 in Nevada, monitoring river discharge in hydrologic subbasin 16050203. It drains a watershed of about 1,801 square miles. Discharge records at this site go back to 1966. Typical flow runs near 865.6 cfs in July and 603.8 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Nevada
- Drainage area
- 1,801 sq mi
- Gauge elevation
- 4,040 ft
- Subbasin (HUC-8)
- 16050203
- Coordinates
- 39.46394, -119.04626
- USGS site number
- 10312150
- Records begin
- 1966-10-01 (60 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 60 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 | 1.1 | 3.2 | 187.1 | |
| February | 1.2 | 3.5 | 532.6 | |
| March | 1.6 | 95.2 | 823.9 | |
| April | 248.5 | 603.8 | 1,304.6 | |
| May | 423.2 | 793.1 | 1,484.5 | |
| June | 537 | 828.3 | 1,506.7 | |
| July | 638.9 | 865.6 | 1,104.4 | |
| August | 529.9 | 796.1 | 993.2 | |
| September | 208.3 | 606.6 | 789.1 | |
| October | 1.5 | 351.2 | 515.7 | |
| November | 1 | 124.1 | 218.3 | |
| December | 1.1 | 3.4 | 7.1 |
All values in cubic feet per second (cfs).
Common questions
- When does Carson River below Lahontan Reservoir near Fallon, NV normally run highest?
- July, on the long-term record. The median daily flow that month is about 865.6 cfs, against 3.2 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 Carson River below Lahontan Reservoir near Fallon, NV?
- It depends on the month. In January, half of days historically fall near 3.2 cfs, with the middle 80% of days between 1.1 and 187.1 cfs. The month-by-month table on this page gives the full range.
- How long has Carson River below Lahontan Reservoir near Fallon, NV been measured?
- Discharge records at USGS site 10312150 begin in 1966, about 60 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 Carson River below Lahontan Reservoir near Fallon, NV?
- The gauge sits at 39.46394, -119.04626, in Nevada, in hydrologic subbasin 16050203, at an elevation of about 4,040 feet, draining roughly 1,801 square miles.
- Can I use Carson River below Lahontan Reservoir near Fallon, NV 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.