USGS Streamgage 12117700
Rock Creek below Walsh Lake near Landsburg, WA
Rock Creek below Walsh Lake near Landsburg, WA is USGS streamgage 12117700 in Washington, monitoring river discharge in hydrologic subbasin 17110012. It drains a watershed of about 5 square miles. Discharge records at this site go back to 1985. Typical flow runs near 5.9 cfs in July and 15.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Washington
- Drainage area
- 5 sq mi
- Gauge elevation
- 724 ft
- Subbasin (HUC-8)
- 17110012
- Coordinates
- 47.39869, -121.9212
- USGS site number
- 12117700
- Records begin
- 1985-10-01 (41 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 5 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 | — | 21.1 | — | |
| February | — | 17.5 | — | |
| March | — | 23.3 | — | |
| April | — | 15.8 | — | |
| May | — | 14 | — | |
| June | — | 8.2 | — | |
| July | — | 5.9 | — | |
| August | — | 4.2 | — | |
| September | — | 4.8 | — | |
| October | — | 6.3 | — | |
| November | — | 19.2 | — | |
| December | — | 16.2 | — |
All values in cubic feet per second (cfs).
Common questions
- When does Rock Creek below Walsh Lake near Landsburg, WA normally run highest?
- March, on the long-term record. The median daily flow that month is about 23.3 cfs, against 4.2 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- How long has Rock Creek below Walsh Lake near Landsburg, WA been measured?
- Discharge records at USGS site 12117700 begin in 1985, about 41 years, covering roughly 67 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Rock Creek below Walsh Lake near Landsburg, WA?
- The gauge sits at 47.39869, -121.9212, in Washington, in hydrologic subbasin 17110012, at an elevation of about 724 feet, draining roughly 5 square miles.
- Can I use Rock Creek below Walsh Lake near Landsburg, WA data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.
Other gauges in this subbasin
- Rock Creek at Highway 516 near Ravensdale, WA
- Cedar River at Renton, WA
- Issaquah Creek near Hobart, WA
- Issaquah Creek near Mouth near Issaquah, WA
- Cottage Lake Creek Ab Bear Creek near Redmond, WA
- Cedar River below Bear Creek near Cedar Falls, WA
- Cedar River near Cedar Falls, WA
- Rex River near Cedar Falls, WA