USGS Streamgage 12118400
Rock Creek at Highway 516 near Ravensdale, WA
Rock Creek at Highway 516 near Ravensdale, WA is USGS streamgage 12118400 in Washington, monitoring river discharge in hydrologic subbasin 17110012. It drains a watershed of about 11 square miles. Discharge records at this site go back to 1956. Typical flow runs near 5 cfs in July and 20.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 11 sq mi
- Gauge elevation
- 568 ft
- Subbasin (HUC-8)
- 17110012
- Coordinates
- 47.36232, -122.01095
- USGS site number
- 12118400
- Records begin
- 1956-07-01 (70 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 70 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 | 9.9 | 22.9 | 53.9 | |
| February | 11 | 26.5 | 51.8 | |
| March | 11 | 23.2 | 49.6 | |
| April | 10.6 | 20.8 | 39.6 | |
| May | 7.2 | 12.2 | 27.7 | |
| June | 4.7 | 7.7 | 17.6 | |
| July | 3.3 | 5 | 10.6 | |
| August | 2.5 | 3.5 | 8.2 | |
| September | 1.9 | 2.8 | 6.9 | |
| October | 3 | 3.7 | 6.7 | |
| November | 3.8 | 5.8 | 17.9 | |
| December | 6 | 14.6 | 40.4 |
All values in cubic feet per second (cfs).