USGS Streamgage 09534550
242 Lateral above Main Drain at Az-Sonora Boundry
242 Lateral above Main Drain at Az-Sonora Boundry is USGS streamgage 09534550 in Arizona, monitoring river discharge in hydrologic subbasin 15030108. Discharge records at this site go back to 1979. Typical flow runs near 6.8 cfs in July and 3.1 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Arizona
- Subbasin (HUC-8)
- 15030108
- Coordinates
- 32.48694, -114.78722
- USGS site number
- 09534550
- Records begin
- 1979-10-01 (47 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 7 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 | — | 0.5 | — | |
| February | — | 3.5 | — | |
| March | — | 2.2 | — | |
| April | — | 3.1 | — | |
| May | — | 6.2 | — | |
| June | — | 8.1 | — | |
| July | — | 6.8 | — | |
| August | — | 4.5 | — | |
| September | — | 5.2 | — | |
| October | — | 0.3 | — | |
| November | — | 0 | — | |
| December | — | 0.6 | — |
All values in cubic feet per second (cfs).
Common questions
- When does 242 Lateral above Main Drain at Az-Sonora Boundry normally run highest?
- June, on the long-term record. The median daily flow that month is about 8.1 cfs, against 0 cfs in November, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- How long has 242 Lateral above Main Drain at Az-Sonora Boundry been measured?
- Discharge records at USGS site 09534550 begin in 1979, about 47 years, covering roughly 3,449 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is 242 Lateral above Main Drain at Az-Sonora Boundry?
- The gauge sits at 32.48694, -114.78722, in Arizona, in hydrologic subbasin 15030108.
- Can I use 242 Lateral above Main Drain at Az-Sonora Boundry 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.
Other gauges in this subbasin
- Colorado River at Nib, above Morelos Dam, AZ
- Colorado River below Cooper Wasteway near Yuma, AZ
- Gila Gravity Canal at Yuma-Mesa Pumping Plant, AZ
- McAs Diversion of B Canal near Yuma, AZ
- Unit B Canal near Yuma, AZ
- Yuma Main Canal below Colorado River. Siphon at Yuma, AZ
- Yuma Main Drain above Arizona-Sonora Boundary