USGS Streamgage 09502000
Salt River below Stewart Mountain Dam, AZ
Salt River below Stewart Mountain Dam, AZ is USGS streamgage 09502000 in Arizona, monitoring river discharge in hydrologic subbasin 15060106. It drains a watershed of about 6,232 square miles. Discharge records at this site go back to 1934. Typical flow runs near 1,313.5 cfs in July and 789.3 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Arizona
- Drainage area
- 6,232 sq mi
- Gauge elevation
- 1,375 ft
- Subbasin (HUC-8)
- 15060106
- Coordinates
- 33.55284, -111.57654
- USGS site number
- 09502000
- Records begin
- 1934-10-01 (92 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 86 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 | 0.1 | 10.4 | 611.6 | |
| February | 0.8 | 26.2 | 1,129.4 | |
| March | 5.4 | 428.6 | 1,914.5 | |
| April | 7.3 | 789.3 | 2,206.3 | |
| May | 352.9 | 998.3 | 1,881.6 | |
| June | 615.6 | 1,268 | 1,921.3 | |
| July | 741.6 | 1,313.5 | 1,881 | |
| August | 577.5 | 1,218.1 | 1,861.6 | |
| September | 403.7 | 1,106.8 | 1,670 | |
| October | 19.4 | 390.7 | 1,036.2 | |
| November | 1.4 | 9.7 | 525.1 | |
| December | 0.8 | 10.8 | 761.6 |
All values in cubic feet per second (cfs).
Common questions
- When does Salt River below Stewart Mountain Dam, AZ normally run highest?
- July, on the long-term record. The median daily flow that month is about 1,313.5 cfs, against 9.7 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 Salt River below Stewart Mountain Dam, AZ?
- It depends on the month. In January, half of days historically fall near 10.4 cfs, with the middle 80% of days between 0.1 and 611.6 cfs. The month-by-month table on this page gives the full range.
- How long has Salt River below Stewart Mountain Dam, AZ been measured?
- Discharge records at USGS site 09502000 begin in 1934, about 92 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 Salt River below Stewart Mountain Dam, AZ?
- The gauge sits at 33.55284, -111.57654, in Arizona, in hydrologic subbasin 15060106, at an elevation of about 1,375 feet, draining roughly 6,232 square miles.
- Can I use Salt River below Stewart Mountain Dam, 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.