USGS Streamgage 14211550
Johnson Creek at Milwaukie, OR
Johnson Creek at Milwaukie, OR is USGS streamgage 14211550 in Oregon, monitoring river discharge in hydrologic subbasin 17090012. It drains a watershed of about 53 square miles. Discharge records at this site go back to 1989. Typical flow runs near 18.5 cfs in July and 61.1 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Oregon
- Drainage area
- 53 sq mi
- Subbasin (HUC-8)
- 17090012
- Coordinates
- 45.4529, -122.64315
- USGS site number
- 14211550
- Records begin
- 1989-04-22 (37 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 | 42.4 | 107.6 | 360.7 | |
| February | 34.1 | 87.2 | 302.7 | |
| March | 35.5 | 82.4 | 247.3 | |
| April | 27 | 61.1 | 161 | |
| May | 19.2 | 37.2 | 112.7 | |
| June | 15 | 26.3 | 60 | |
| July | 13.1 | 18.5 | 28.3 | |
| August | 11.9 | 17.1 | 25.3 | |
| September | 12.5 | 17.7 | 34.4 | |
| October | 14.3 | 23 | 69 | |
| November | 19.8 | 57.9 | 211.8 | |
| December | 32.2 | 95 | 379.3 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- Willamette River at Portland, OR
- Fairview Creek at Glisan St near Gresham, OR
- Columbia Slough at Portland, OR
- 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