USGS Streamgage 12435500
Feeder Canal at Grand Coulee, WA
Feeder Canal at Grand Coulee, WA is USGS streamgage 12435500 in Washington, monitoring river discharge in hydrologic subbasin 17020001. Discharge records at this site go back to 1952. Typical flow runs near 7,587.4 cfs in July and 3,134.3 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Washington
- Gauge elevation
- 1,570 ft
- Subbasin (HUC-8)
- 17020001
- Coordinates
- 47.95126, -118.99558
- USGS site number
- 12435500
- Records begin
- 1952-05-01 (74 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 74 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 | -129.3 | 0 | 40.2 | |
| February | -42.1 | 0 | 1,012.1 | |
| March | -6.6 | 10.1 | 3,097.7 | |
| April | 0 | 3,134.3 | 9,099.7 | |
| May | 989.3 | 6,640.3 | 10,826.1 | |
| June | 3,644.7 | 7,711.3 | 11,816.7 | |
| July | 4,024.5 | 7,587.4 | 12,074.2 | |
| August | 1,739.1 | 5,762.6 | 10,102.3 | |
| September | 0 | 3,831.7 | 8,964.7 | |
| October | 0 | 1,426.1 | 5,565.2 | |
| November | -0.2 | 0 | 1,272.6 | |
| December | -2.6 | 0 | 255.3 |
All values in cubic feet per second (cfs).