USGS Streamgage 14153500
Coast Fork Willamette River below Cottage Grove Dam, OR
Coast Fork Willamette River below Cottage Grove Dam, OR is USGS streamgage 14153500 in Oregon, monitoring river discharge in hydrologic subbasin 17090002. It drains a watershed of about 104 square miles. Discharge records at this site go back to 1939. Typical flow runs near 52.5 cfs in July and 116.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Oregon
- Drainage area
- 104 sq mi
- Subbasin (HUC-8)
- 17090002
- Coordinates
- 43.72068, -123.0498
- USGS site number
- 14153500
- Records begin
- 1939-01-01 (87 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 87 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 | 101 | 341 | 1,411.4 | |
| February | 71.1 | 210 | 957.2 | |
| March | 65.6 | 186.2 | 803.8 | |
| April | 57.5 | 116.7 | 516.8 | |
| May | 55.6 | 83.3 | 321.4 | |
| June | 51.2 | 76.3 | 191.2 | |
| July | 43.5 | 52.5 | 76.9 | |
| August | 42.2 | 53.9 | 184.8 | |
| September | 48.9 | 152.7 | 358.6 | |
| October | 50.4 | 216.2 | 384.4 | |
| November | 42.6 | 149.8 | 735.8 | |
| December | 67.3 | 316.4 | 1,316.5 |
All values in cubic feet per second (cfs).