USGS Streamgage 09469500
Gila River below Coolidge Dam, AZ
Gila River below Coolidge Dam, AZ is USGS streamgage 09469500 in Arizona, monitoring river discharge in hydrologic subbasin 15050100. It sits on the Gila River, alongside 16 other gauges Rivermatics tracks on the same river. It drains a watershed of about 12,886 square miles. Discharge records at this site go back to 1899. Typical flow runs near 484.9 cfs in July and 386 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
- 12,886 sq mi
- Gauge elevation
- 2,311 ft
- Subbasin (HUC-8)
- 15050100
- Coordinates
- 33.16934, -110.53146
- USGS site number
- 09469500
- Records begin
- 1899-07-11 (127 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Gila River below Coolidge 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 |
|---|---|---|---|---|
| 0.6 | 0.7 | 0.9 | ||
| 0.6 | 0.7 | 1.4 | ||
| 0.6 | 0.7 | 1.6 | ||
| 0.6 | 0.7 | 1.9 | ||
| 0.6 | 0.7 | 2.2 | ||
| 0.6 | 0.7 | 2.3 | ||
| 0.5 | 0.7 | 2.3 | ||
| 0.5 | 0.7 | 2.9 | ||
| 0.5 | 0.8 | 3.1 | ||
| 0.5 | 0.8 | 3.2 | ||
| 0.5 | 0.8 | 3.2 | ||
| 0.5 | 0.8 | 2.9 | ||
| 0.5 | 0.7 | 2.5 | ||
| 0.5 | 0.7 | 2.5 |
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 127 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 | 0.7 | 61.4 | 288 | |
| February | 2.8 | 138.1 | 471.4 | |
| March | 34.7 | 302 | 873.4 | |
| April | 33.3 | 386 | 720.2 | |
| May | 5.1 | 383.7 | 752.6 | |
| June | 0.7 | 433.6 | 982.2 | |
| July | 0.8 | 484.9 | 1,159.7 | |
| August | 2.3 | 397.5 | 1,126.1 | |
| September | 5.1 | 263.7 | 670.4 | |
| October | 1.3 | 96.3 | 317.8 | |
| November | 0.8 | 24.7 | 244.4 | |
| December | 1.2 | 121.9 | 342.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Gila River below Coolidge Dam, AZ normally run highest?
- July, on the long-term record. The median daily flow that month is about 484.9 cfs, against 24.7 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 Gila River below Coolidge Dam, AZ?
- It depends on the month. In January, half of days historically fall near 61.4 cfs, with the middle 80% of days between 0.7 and 288 cfs. The month-by-month table on this page gives the full range.
- How long has Gila River below Coolidge Dam, AZ been measured?
- Discharge records at USGS site 09469500 begin in 1899, about 127 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 Gila River below Coolidge 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 Gila River below Coolidge Dam, AZ?
- The gauge sits at 33.16934, -110.53146, in Arizona, in hydrologic subbasin 15050100, at an elevation of about 2,311 feet, draining roughly 12,886 square miles.
- Can I use Gila River below Coolidge 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 Gila River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Gila River in full.
- Gila River near Gila Hot Springs, NM 1,510 sq mi
- Gila River near Gila, NM 1,864 sq mi
- Gila River near Redrock, NM 2,829 sq mi
- Gila River below Blue Creek, near Virden, NM 3,203 sq mi
- Gila River at Duncan, AZ 3,589 sq mi
- Gila River near Clifton, AZ 4,010 sq mi
- Gila River at Head of Safford Valley, near Solomon 7,857 sq mi
- Gila River at Calva, AZ 11,470 sq mi
- Gila River below Coolidge Dam, AZ this page
- Gila River at Kelvin, AZ 18,011 sq mi
- Gila River near Maricopa, AZ 19,915 sq mi
- Gila River at Estrella Parkway, near Goodyear, AZ 45,585 sq mi
- Gila River below Painted Rock Dam, AZ 50,910 sq mi
- Gila River near Dateland, AZ 55,000 sq mi
- Gila River near Dome, AZ 57,850 sq mi
- Gila River at Miller Rd near Buckeye, AZ
- Gila River below Gillespie Dam, Az (Low-Flow Station)