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USGS 12031000 CHEHALIS RIVER AT PORTER, WA

PROVISIONAL DATA SUBJECT TO REVISION

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Additional Data and Information.--Station data inventory, annual data report, and latest shifted rating.

Flood Stage.--The National Weather Service Flood Stage for this station is 44.5 feet.

Funding for this site is provided by the cooperators / programs below:

Station Notes
gage
Gage height datum conversion to the NAVD88 datum for this streamgage was completed on May 10, 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 27.11 ft was used to convert the old gage heights to the currently reported instantaneous gage height, discharge measurement gage heights, and stage-discharge rating points.

Boating safety tips

This station managed by the Western Washington Field Office (Tacoma).

Available Parameters Available Period
All 3 Available Parameters for this site
   
00060 Discharge 1989-10-01  2019-01-17
00065 Gage height [NAVD 1988 as of 5/10/2018] 1990-02-22  2019-01-17
63680 Turbidity, Form Neph 2018-12-13  2019-01-17

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Summary of all available data for this site
Instantaneous-data availability statement

Discharge, cubic feet per second
Most recent instantaneous value: 4250 01-17-2019   21:45 PST
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Daily discharge, cubic feet per second -- statistics for Jan 18 based on 63 years of record more
Min
(2001)		 Most Recent
Instantaneous
Value Jan 18		 25th
percen-
tile		 Median Mean 75th
percen-
tile		 Max
(1971)
1590 4250 4580 7700 10200 15000 29700

Gage height, feet, [NAVD 1988 as of 5/10/2018]
Most recent instantaneous value: 36.01 01-17-2019   21:45 PST
Graph of Gage height, feet, [NAVD 1988 as of 5/10/2018]

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Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)
Most recent instantaneous value: 10.0 01-17-2019   21:45 PST
Graph of Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)

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