USGS Streamgage 09519000
Enterprise Canal at Gillespie Dam, AZ
Enterprise Canal at Gillespie Dam, AZ is USGS streamgage 09519000 in Arizona, monitoring river discharge in hydrologic subbasin 15070101. It drains a watershed of about 49,650 square miles. Discharge records at this site go back to 1974. Typical flow runs near 9.4 cfs in July and 9.9 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Arizona
- Drainage area
- 49,650 sq mi
- Subbasin (HUC-8)
- 15070101
- Coordinates
- 33.22921, -112.77156
- USGS site number
- 09519000
- Records begin
- 1974-03-12 (52 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 33 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 | 4.6 | 10.5 | 16.9 | |
| February | 2.4 | 10 | 16.3 | |
| March | 4.4 | 9.9 | 16.8 | |
| April | 5.6 | 9.9 | 15.8 | |
| May | 6 | 10.1 | 16 | |
| June | 5.8 | 9.6 | 15.2 | |
| July | 4.5 | 9.4 | 15 | |
| August | 4 | 9.8 | 15.7 | |
| September | 4.5 | 10.7 | 17.3 | |
| October | 5.5 | 10.9 | 16.8 | |
| November | 0.3 | 10.5 | 16.3 | |
| December | 2.2 | 11.2 | 16.7 |
All values in cubic feet per second (cfs).
Common questions
- When does Enterprise Canal at Gillespie Dam, AZ normally run highest?
- December, on the long-term record. The median daily flow that month is about 11.2 cfs, against 9.4 cfs in July, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Enterprise Canal at Gillespie Dam, AZ?
- It depends on the month. In January, half of days historically fall near 10.5 cfs, with the middle 80% of days between 4.6 and 16.9 cfs. The month-by-month table on this page gives the full range.
- How long has Enterprise Canal at Gillespie Dam, AZ been measured?
- Discharge records at USGS site 09519000 begin in 1974, about 52 years, covering roughly 8,761 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Enterprise Canal at Gillespie Dam, AZ?
- The gauge sits at 33.22921, -112.77156, in Arizona, in hydrologic subbasin 15070101, draining roughly 49,650 square miles.
- Can I use Enterprise Canal at Gillespie 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.