USGS 12020800 SOUTH FORK CHEHALIS RIVER NEAR WILDWOOD, WA
46°26'42", Longitude 123°04'57", in NW 1/4 NE 1/4
Section 17, Township 11 North, Range 3 West, in Lewis County, Hydrologic Unit 17100103, on
left bank at Wildwood Road bridge, 0.4 mile downstream from Black
Creek, 1.2 miles southeast of Wildwood, and at river mile
area is 27.0 mi2. Datum of
the gage is NAVD of 1988. Prior to May 1, 2018, datum of the gage was
NVGD of 1929.
this station on a
map of the basin (PDF).
Additional Data and Information.-- Latest shifted
Flood Stage.--The National Weather Service has not
established a Flood
Stage for this station. Lewis County has Flood Phase information for this
Funding for this site is provided by the
cooperators / programs below:
The 15-minute precipitation 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
This station is operated
from October 1 to April 30.
height datum conversion to the NAVD88 datum for this streamgage was
completed on May 1, 2018. All reported gage heights and those
associated with discharge measurements and stage-discharge ratings
have been converted and are consistent with elevations based on the
NAVD88 datum. A conversion factor of 1.27 ft was used to convert
the old gage heights to the currently reported instantaneous gage
height, discharge measurement gage heights, and stage-discharge
This station managed by the Western Washington Field Office (Tacoma).
Summary of all available data for this site
Instantaneous-data availability statement
Most recent instantaneous value: Ssn
05-18-2023 09:15 PDT
Most recent instantaneous value: 93.7 05-01-2023 01:15 PDT
Most recent instantaneous value: 357.27 05-01-2023 01:15 PDT