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 sits on the Salt River, alongside 2 other gauges Rivermatics tracks on the same river. 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. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.
View live conditions & forecast →
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)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Salt River below Stewart Mountain Dam, AZ. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 445 | 545 | 706 | ||
| 385 | 556 | 870 | ||
| 355 | 562 | 956 | ||
| 368 | 592 | 983 | ||
| 370 | 603 | 988 | ||
| 360 | 591 | 947 | ||
| 353 | 592 | 934 | ||
| 363 | 610 | 940 | ||
| 355 | 607 | 920 | ||
| 364 | 614 | 910 | ||
| 353 | 602 | 888 | ||
| 326 | 580 | 873 | ||
| 332 | 594 | 892 | ||
| 332 | 596 | 890 |
All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.
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 9,130 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Salt River below Stewart Mountain Dam, AZ?
- Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
- 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.
Upstream and downstream on the Salt River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Salt River in full.
- Salt River near Chrysotile, AZ 2,849 sq mi
- Salt River near Roosevelt, AZ 4,306 sq mi
- Salt River below Stewart Mountain Dam, AZ this page