USGS Streamgage 09512800
Agua Fria River near Rock Springs, AZ
Agua Fria River near Rock Springs, AZ is USGS streamgage 09512800 in Arizona, monitoring river discharge in hydrologic subbasin 15070102. It drains a watershed of about 1,111 square miles. Discharge records at this site go back to 1919. Typical flow runs near 0.8 cfs in July and 4.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Arizona
- Drainage area
- 1,111 sq mi
- Gauge elevation
- 1,773 ft
- Subbasin (HUC-8)
- 15070102
- Coordinates
- 34.0156, -112.16795
- USGS site number
- 09512800
- Records begin
- 1919-11-27 (107 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 57 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 | 0.2 | 5.1 | 195.1 | |
| February | 0.4 | 11.2 | 473 | |
| March | 0.4 | 16.4 | 468.6 | |
| April | 0.1 | 4.7 | 134.2 | |
| May | 0 | 1.5 | 24 | |
| June | 0 | 0.5 | 6.5 | |
| July | 0 | 0.8 | 28.6 | |
| August | 0 | 1.6 | 67 | |
| September | 0 | 1.3 | 31.8 | |
| October | 0 | 0.7 | 11.9 | |
| November | 0 | 0.9 | 18.6 | |
| December | 0.1 | 1.5 | 68.9 |
All values in cubic feet per second (cfs).
Common questions
- When does Agua Fria River near Rock Springs, AZ normally run highest?
- March, on the long-term record. The median daily flow that month is about 16.4 cfs, against 0.5 cfs in June, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Agua Fria River near Rock Springs, AZ?
- It depends on the month. In January, half of days historically fall near 5.1 cfs, with the middle 80% of days between 0.2 and 195.1 cfs. The month-by-month table on this page gives the full range.
- How long has Agua Fria River near Rock Springs, AZ been measured?
- Discharge records at USGS site 09512800 begin in 1919, about 107 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 Agua Fria River near Rock Springs, AZ?
- The gauge sits at 34.0156, -112.16795, in Arizona, in hydrologic subbasin 15070102, at an elevation of about 1,773 feet, draining roughly 1,111 square miles.
- Can I use Agua Fria River near Rock Springs, 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.