USGS Streamgage 10296500
W Walker River near Coleville, CA
W Walker River near Coleville, CA is USGS streamgage 10296500 in California, monitoring river discharge in hydrologic subbasin 16050302. It drains a watershed of about 250 square miles. Discharge records at this site go back to 1902. Typical flow runs near 332.1 cfs in July and 285.5 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- California
- Drainage area
- 250 sq mi
- Gauge elevation
- 5,520 ft
- Subbasin (HUC-8)
- 16050302
- Coordinates
- 38.51324, -119.44989
- USGS site number
- 10296500
- Records begin
- 1902-10-01 (124 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 124 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 | 32.4 | 57.8 | 120.1 | |
| February | 39.8 | 69.6 | 127.9 | |
| March | 57.2 | 108.5 | 225.6 | |
| April | 142.2 | 285.5 | 544.2 | |
| May | 334.3 | 708 | 1,408 | |
| June | 265.2 | 873.3 | 1,866 | |
| July | 85.1 | 332.1 | 1,156.3 | |
| August | 40 | 110.1 | 355.1 | |
| September | 27.2 | 64.1 | 153.3 | |
| October | 28 | 57 | 114.6 | |
| November | 31.6 | 60.2 | 117.4 | |
| December | 30.9 | 56.5 | 109.9 |
All values in cubic feet per second (cfs).
Common questions
- When does W Walker River near Coleville, CA normally run highest?
- June, on the long-term record. The median daily flow that month is about 873.3 cfs, against 56.5 cfs in December, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for W Walker River near Coleville, CA?
- It depends on the month. In January, half of days historically fall near 57.8 cfs, with the middle 80% of days between 32.4 and 120.1 cfs. The month-by-month table on this page gives the full range.
- How long has W Walker River near Coleville, CA been measured?
- Discharge records at USGS site 10296500 begin in 1902, about 124 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 W Walker River near Coleville, CA?
- The gauge sits at 38.51324, -119.44989, in California, in hydrologic subbasin 16050302, at an elevation of about 5,520 feet, draining roughly 250 square miles.
- Can I use W Walker River near Coleville, 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.