USGS Streamgage 09474000
Gila River at Kelvin, AZ
Gila River at Kelvin, AZ is USGS streamgage 09474000 in Arizona, monitoring river discharge in hydrologic subbasin 15050100. It drains a watershed of about 18,011 square miles. Discharge records at this site go back to 1891. Typical flow runs near 577.9 cfs in July and 403.7 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Arizona
- Drainage area
- 18,011 sq mi
- Gauge elevation
- 1,747 ft
- Subbasin (HUC-8)
- 15050100
- Coordinates
- 33.10286, -110.97652
- USGS site number
- 09474000
- Records begin
- 1891-02-22 (135 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 116 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 | 23.4 | 124.6 | 587.5 | |
| February | 55.9 | 198.6 | 815.7 | |
| March | 111.9 | 361.9 | 1,241.9 | |
| April | 60.6 | 403.7 | 854.3 | |
| May | 14.3 | 376.1 | 779.1 | |
| June | 1.2 | 422.5 | 1,011.6 | |
| July | 13.1 | 577.9 | 1,274.5 | |
| August | 93.4 | 593.1 | 1,358.4 | |
| September | 27.2 | 327 | 781.9 | |
| October | 9.1 | 129.3 | 369.2 | |
| November | 5.8 | 57.8 | 277.5 | |
| December | 28.3 | 169.1 | 415.9 |
All values in cubic feet per second (cfs).
Common questions
- When does Gila River at Kelvin, AZ normally run highest?
- August, on the long-term record. The median daily flow that month is about 593.1 cfs, against 57.8 cfs in November, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Gila River at Kelvin, AZ?
- It depends on the month. In January, half of days historically fall near 124.6 cfs, with the middle 80% of days between 23.4 and 587.5 cfs. The month-by-month table on this page gives the full range.
- How long has Gila River at Kelvin, AZ been measured?
- Discharge records at USGS site 09474000 begin in 1891, about 135 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 Gila River at Kelvin, AZ?
- The gauge sits at 33.10286, -110.97652, in Arizona, in hydrologic subbasin 15050100, at an elevation of about 1,747 feet, draining roughly 18,011 square miles.
- Can I use Gila River at Kelvin, AZ 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.