USGS Streamgage 14152500
Coast Fork Willamette at London, OR
Coast Fork Willamette at London, OR is USGS streamgage 14152500 in Oregon, monitoring river discharge in hydrologic subbasin 17090002. It drains a watershed of about 72 square miles. Discharge records at this site go back to 1935. Typical flow runs near 28.2 cfs in July and 191.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Oregon
- Drainage area
- 72 sq mi
- Subbasin (HUC-8)
- 17090002
- Coordinates
- 43.64151, -123.08591
- USGS site number
- 14152500
- Records begin
- 1935-10-01 (91 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 91 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 | 81.6 | 235.2 | 948.3 | |
| February | 108.5 | 270 | 817.7 | |
| March | 115.5 | 264.1 | 693.3 | |
| April | 89.2 | 191.8 | 455.6 | |
| May | 56.9 | 112.5 | 266.9 | |
| June | 32.1 | 57.1 | 143.9 | |
| July | 17 | 28.2 | 49.4 | |
| August | 10.9 | 17.3 | 28.4 | |
| September | 10 | 16.3 | 35.7 | |
| October | 14.1 | 26.8 | 116.5 | |
| November | 23.8 | 102.7 | 562.2 | |
| December | 50.2 | 225.5 | 882.5 |
All values in cubic feet per second (cfs).