USGS Streamgage 10251300
Amargosa River at Tecopa, CA
Amargosa River at Tecopa, CA is USGS streamgage 10251300 in California, monitoring river discharge in hydrologic subbasin 18090202. It drains a watershed of about 3,090 square miles. Discharge records at this site go back to 1961. Typical flow runs near 0 cfs in July and 0.4 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 3,090 sq mi
- Gauge elevation
- 1,293 ft
- Subbasin (HUC-8)
- 18090202
- Coordinates
- 35.84944, -116.23083
- USGS site number
- 10251300
- Records begin
- 1961-10-01 (65 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 65 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 | 0.6 | 1.3 | 8.2 | |
| February | 0.6 | 1.3 | 13.7 | |
| March | 0.4 | 0.9 | 7.1 | |
| April | 0.2 | 0.4 | 1.1 | |
| May | 0 | 0.1 | 0.4 | |
| June | 0 | 0.1 | 0.1 | |
| July | 0 | 0 | 0.2 | |
| August | 0 | 0 | 1.1 | |
| September | 0 | 0 | 0.9 | |
| October | 0 | 0.1 | 0.4 | |
| November | 0.1 | 0.3 | 1.3 | |
| December | 0.4 | 1 | 3.6 |
All values in cubic feet per second (cfs).
Common questions
- When does Amargosa River at Tecopa, CA normally run highest?
- January, on the long-term record. The median daily flow that month is about 1.3 cfs, against 0 cfs in July, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Amargosa River at Tecopa, CA?
- It depends on the month. In January, half of days historically fall near 1.3 cfs, with the middle 80% of days between 0.6 and 8.2 cfs. The month-by-month table on this page gives the full range.
- How long has Amargosa River at Tecopa, CA been measured?
- Discharge records at USGS site 10251300 begin in 1961, about 65 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 Amargosa River at Tecopa, CA?
- The gauge sits at 35.84944, -116.23083, in California, in hydrologic subbasin 18090202, at an elevation of about 1,293 feet, draining roughly 3,090 square miles.
- Can I use Amargosa River at Tecopa, 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.