USGS Streamgage 10336660
Blackwood C near Tahoe City, CA
Blackwood C near Tahoe City, CA is USGS streamgage 10336660 in California, monitoring river discharge in hydrologic subbasin 16050101. It drains a watershed of about 11 square miles. Discharge records at this site go back to 1960. Typical flow runs near 10 cfs in July and 55.9 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 11 sq mi
- Gauge elevation
- 6,229 ft
- Subbasin (HUC-8)
- 16050101
- Coordinates
- 39.10739, -120.16211
- USGS site number
- 10336660
- Records begin
- 1960-10-01 (66 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 66 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 | 3 | 8.2 | 40.1 | |
| February | 4.1 | 12.1 | 37.2 | |
| March | 9.6 | 20.9 | 56.8 | |
| April | 24.6 | 55.9 | 112.4 | |
| May | 44 | 111 | 230.3 | |
| June | 14.6 | 68.2 | 223 | |
| July | 3.2 | 10 | 59.7 | |
| August | 1.6 | 2.9 | 9.9 | |
| September | 1.2 | 2 | 4.2 | |
| October | 1.3 | 2.4 | 7.2 | |
| November | 1.8 | 3.6 | 20.2 | |
| December | 2.3 | 5.6 | 35.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Blackwood C near Tahoe City, CA normally run highest?
- May, on the long-term record. The median daily flow that month is about 111 cfs, against 2 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Blackwood C near Tahoe City, CA?
- It depends on the month. In January, half of days historically fall near 8.2 cfs, with the middle 80% of days between 3 and 40.1 cfs. The month-by-month table on this page gives the full range.
- How long has Blackwood C near Tahoe City, CA been measured?
- Discharge records at USGS site 10336660 begin in 1960, about 66 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 Blackwood C near Tahoe City, CA?
- The gauge sits at 39.10739, -120.16211, in California, in hydrologic subbasin 16050101, at an elevation of about 6,229 feet, draining roughly 11 square miles.
- Can I use Blackwood C near Tahoe City, 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.