USGS Streamgage 09486520
Santa Cruz River at Trico Road, near Marana, AZ
Santa Cruz River at Trico Road, near Marana, AZ is USGS streamgage 09486520 in Arizona, monitoring river discharge in hydrologic subbasin 15050303. It drains a watershed of about 3,641 square miles. Discharge records at this site go back to 1989. Typical flow runs near 13.4 cfs in July and 15.6 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Arizona
- Drainage area
- 3,641 sq mi
- Gauge elevation
- 1,899 ft
- Subbasin (HUC-8)
- 15050303
- Coordinates
- 32.47159, -111.30197
- USGS site number
- 09486520
- Records begin
- 1989-04-01 (37 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 37 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 | 7.3 | 28.6 | 70.5 | |
| February | 0.4 | 26.6 | 59.6 | |
| March | 0 | 20.5 | 47.6 | |
| April | 0 | 15.6 | 37.6 | |
| May | 0 | 11.2 | 26.4 | |
| June | 0 | 7.8 | 23.8 | |
| July | 0 | 13.4 | 206.5 | |
| August | 0 | 17.5 | 173.7 | |
| September | 0 | 18.8 | 65.7 | |
| October | 0.9 | 21.1 | 40.3 | |
| November | 2 | 24.2 | 45.2 | |
| December | 6.1 | 26.4 | 53.1 |
All values in cubic feet per second (cfs).
Common questions
- When does Santa Cruz River at Trico Road, near Marana, AZ normally run highest?
- January, on the long-term record. The median daily flow that month is about 28.6 cfs, against 7.8 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 Santa Cruz River at Trico Road, near Marana, AZ?
- It depends on the month. In January, half of days historically fall near 28.6 cfs, with the middle 80% of days between 7.3 and 70.5 cfs. The month-by-month table on this page gives the full range.
- How long has Santa Cruz River at Trico Road, near Marana, AZ been measured?
- Discharge records at USGS site 09486520 begin in 1989, about 37 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 Santa Cruz River at Trico Road, near Marana, AZ?
- The gauge sits at 32.47159, -111.30197, in Arizona, in hydrologic subbasin 15050303, at an elevation of about 1,899 feet, draining roughly 3,641 square miles.
- Can I use Santa Cruz River at Trico Road, near Marana, 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.