USGS Current Conditions for USGS 12031000 CHEHALIS RIVER AT PORTER, WA

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Washington Water Science Center | Subscribe to Water Alerts | Threatened and Endangered Stations in Washington

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:

Washington State Department of Ecology
USGS

Station Notes

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.

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

Available Parameters	Available Period
All 2 Available Parameters for this site
00060 Discharge	1989-10-01	2018-08-18
00065 Gage height	1990-02-22	2018-08-18

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**Daily discharge, cubic feet per second -- statistics for Aug 18 based on 63 years of record more**
Min (1967)	Most Recent Instantaneous Value Aug 18	25th percen- tile	Median	Mean	75th percen- tile	Max (1976)
197	276	321	364	383	446	745

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U.S. Department of the Interior | U.S. Geological Survey
Title: USGS Current Conditions for Washington
URL: https://waterdata.usgs.gov/wa/nwis/uv?

Page Contact Information: Washington Water Data Support Team
Page Last Modified: 2018-08-18 08:02:24 EDT
1.65 1.37 vaww02