Location.--Latitude 47°08'23", Longitude
122°05'29", in NE 1/4 NW 1/4 Section 18, Township 19 North,
Range 6 East, in Pierce County, Hydrologic Unit 17110014, on
downstream side of bridge on State Highway 162, 0.8 mi downstream from
Wilkeson Creek, 0.3 mi east of South Prairie, and at river mile
area is 79.5 mi2. Datum of
gage is 400.0 feet above NGVD of 1929.
15-minute precipitation and air temperature data for this station
are temporary and will only be displayed for 120 days.
Time series of 15-minute or cumulative daily values will NOT be
available for retrieval following the 120-day display period.
Although the instrumentation is calibrated at least once/year, the
temporary classification means that documented routine inspections
and other quality assurance measures are not performed that would
make the data acceptable for archival, retrieval, or future use in
general scientific or interpretive studies.
On Feb. 1, 2021, the National
Weather Service updated the minor flood flow level to 4,000
cfs. (Message posted Feb. 3, 2021)