USGS Streamgage 09527700
All-American Canal below Drop 2 Reservoir Outlet
All-American Canal below Drop 2 Reservoir Outlet is USGS streamgage 09527700 in California, monitoring river discharge in hydrologic subbasin 18100204. Discharge records at this site go back to 2011. Typical flow runs near 4,029.7 cfs in July and 4,624.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Gauge elevation
- 81 ft
- Subbasin (HUC-8)
- 18100204
- Coordinates
- 32.70425, -115.04811
- USGS site number
- 09527700
- Records begin
- 2011-10-25 (15 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 15 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 | 871.5 | 1,842.6 | 2,474.2 | |
| February | 1,548.4 | 2,693.1 | 3,325.7 | |
| March | 2,385.2 | 3,876.5 | 4,687.7 | |
| April | 3,380.7 | 4,624.7 | 5,381.7 | |
| May | 3,783.9 | 4,782.9 | 5,465.5 | |
| June | 3,745.3 | 4,601 | 5,224.3 | |
| July | 3,147.4 | 4,029.7 | 4,853.9 | |
| August | 2,088.1 | 3,644.5 | 4,373.9 | |
| September | 1,926.3 | 3,278.7 | 4,041.3 | |
| October | 2,636.5 | 3,471 | 3,995.2 | |
| November | 1,650.4 | 2,610.7 | 3,094 | |
| December | 987.3 | 1,953.2 | 2,598.4 |
All values in cubic feet per second (cfs).
Common questions
- When does All-American Canal below Drop 2 Reservoir Outlet normally run highest?
- May, on the long-term record. The median daily flow that month is about 4,782.9 cfs, against 1,842.6 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for All-American Canal below Drop 2 Reservoir Outlet?
- It depends on the month. In January, half of days historically fall near 1,842.6 cfs, with the middle 80% of days between 871.5 and 2,474.2 cfs. The month-by-month table on this page gives the full range.
- How long has All-American Canal below Drop 2 Reservoir Outlet been measured?
- Discharge records at USGS site 09527700 begin in 2011, about 15 years, covering roughly 5,394 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is All-American Canal below Drop 2 Reservoir Outlet?
- The gauge sits at 32.70425, -115.04811, in California, in hydrologic subbasin 18100204, at an elevation of about 81 feet.
- Can I use All-American Canal below Drop 2 Reservoir Outlet 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.