USGS Streamgage 14211820
Columbia Slough at Portland, OR
Columbia Slough at Portland, OR is USGS streamgage 14211820 in Oregon, monitoring river discharge in hydrologic subbasin 17090012. Discharge records at this site go back to 1988. Typical flow runs near 95.1 cfs in July and 106.3 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Oregon
- Subbasin (HUC-8)
- 17090012
- Coordinates
- 45.63901, -122.76315
- USGS site number
- 14211820
- Records begin
- 1988-10-14 (38 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 36 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 | 11.8 | 154.5 | 320.5 | |
| February | 23 | 148 | 331.2 | |
| March | -4.3 | 130.2 | 278.1 | |
| April | -54.7 | 106.3 | 272.4 | |
| May | -138.4 | 65.4 | 234.8 | |
| June | -102 | 84.8 | 278.7 | |
| July | 0.3 | 95.1 | 211.2 | |
| August | 1.9 | 78.4 | 160.8 | |
| September | -1.7 | 72.2 | 148.3 | |
| October | 4.9 | 85.9 | 175.4 | |
| November | 12.2 | 107.1 | 215.2 | |
| December | 6.4 | 128.5 | 302.2 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- MITCHELL CREEK at SE 162nd AVE, at PORTLAND, OR
- Badger Creek at Rugg Road near Gresham, OR
- Sunshine Creek at Mouth near Gresham, OR
- N Fk Johnson Creek near Se Orient Dr, near Gresham, OR
- Tryon Creek near Lake Oswego, OR
- Johnson Creek at Regner Road, at Gresham, OR
- Kelley Creek at Se 159Th Drive at Portland, OR
- Johnson Creek at Sycamore, OR