USGS Streamgage 11521500
Indian C near Happy Camp, CA
Indian C near Happy Camp, CA is USGS streamgage 11521500 in California, monitoring river discharge in hydrologic subbasin 18010209. It drains a watershed of about 120 square miles. Discharge records at this site go back to 1912. Typical flow runs near 90 cfs in July and 615.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 120 sq mi
- Gauge elevation
- 1,202 ft
- Subbasin (HUC-8)
- 18010209
- Coordinates
- 41.83509, -123.38308
- USGS site number
- 11521500
- Records begin
- 1912-02-17 (114 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 70 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 | 128.9 | 453.5 | 1,634.2 | |
| February | 232.8 | 552.7 | 1,610.7 | |
| March | 294.8 | 624.2 | 1,436.5 | |
| April | 269.7 | 615.8 | 1,181 | |
| May | 177 | 456 | 999 | |
| June | 99.9 | 198.9 | 487.2 | |
| July | 54.6 | 90 | 152.3 | |
| August | 36.4 | 58.4 | 83.1 | |
| September | 30.7 | 47.6 | 65.8 | |
| October | 34.3 | 52.6 | 131.9 | |
| November | 50.1 | 124.6 | 661.4 | |
| December | 83 | 308.4 | 1,516.6 |
All values in cubic feet per second (cfs).
Common questions
- When does Indian C near Happy Camp, CA normally run highest?
- March, on the long-term record. The median daily flow that month is about 624.2 cfs, against 47.6 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 Indian C near Happy Camp, CA?
- It depends on the month. In January, half of days historically fall near 453.5 cfs, with the middle 80% of days between 128.9 and 1,634.2 cfs. The month-by-month table on this page gives the full range.
- How long has Indian C near Happy Camp, CA been measured?
- Discharge records at USGS site 11521500 begin in 1912, about 114 years, covering roughly 8,943 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Indian C near Happy Camp, CA?
- The gauge sits at 41.83509, -123.38308, in California, in hydrologic subbasin 18010209, at an elevation of about 1,202 feet, draining roughly 120 square miles.
- Can I use Indian C near Happy Camp, 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.