USGS 14243000 COWLITZ RIVER AT CASTLE ROCK, WA

PROVISIONAL DATA SUBJECT TO REVISION

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Additional Data and Information.-- Latest shifted rating.

Flood Stage.--The National Weather Service Flood Stage for this station is 48.0 feet.

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

Boating safety tips

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

Available Parameters Available Period
  
1961-12-20  2026-09-08
2007-10-01  2026-09-08
2008-10-01  2026-09-08
2020-10-29  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08
2023-09-08  2026-09-08







 (7)
 
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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: 2500 09-08-2026   08:30 PDT
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Daily discharge, cubic feet per second -- statistics for Sep 8 based on 84 water years of record more
Min
(1930)		 25th
percen-
tile		 Most Recent
Instantaneous
Value Sep 8		 Median Mean 75th
percen-
tile		 Max
(1970)
1450 2100 2500 2810 3020 3670 6690

Gage height, feet, [NAVD 1988, feet]
Most recent instantaneous value: 33.10 09-08-2026   08:30 PDT
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Stream water level elevation above NAVD 1988, in feet
 
-- Data temporarily unavailable for the time period specified --

Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU), RIGHT BANK, [Analite NEP5000]
 
-- Data temporarily unavailable for the time period specified --

Water velocity reading from field sensor, feet per second, RIGHT BANK, [from ADVM 1500kHz]
Most recent instantaneous value: 1.30 09-08-2026   08:15 PDT
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Water velocity reading from field sensor, feet per second, RIGHT BANK, [from ADVM 500kHz]
Most recent instantaneous value: 1.17 09-08-2026   08:15 PDT
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Suspended sediment load, water, unfiltered, computed, the product of regression-computed suspended sediment concentration and streamflow, short tons per day, [Suspended Load, Fines]
 
-- Data temporarily unavailable for the time period specified --

Suspended sediment load, water, unfiltered, computed, the product of regression-computed suspended sediment concentration and streamflow, short tons per day, [Suspended Load, Sands]
 
-- Data temporarily unavailable for the time period specified --

Suspended sediment load, water, unfiltered, computed, the product of regression-computed suspended sediment concentration and streamflow, short tons per day, [Total Suspended Load, Sands an]
 
-- Data temporarily unavailable for the time period specified --

Upper 90 percent prediction limit for SSC by regression (PCODE 99409), milligrams per liter, [Suspended Fines]
 
-- Data temporarily unavailable for the time period specified --

Upper 90 percent prediction limit for SSC by regression (PCODE 99409), milligrams per liter, [Suspended Sands]
 
-- Data temporarily unavailable for the time period specified --

Upper 90 percent prediction limit for SSC by regression (PCODE 99409), milligrams per liter, [Total SSC, Sands and Fines]
 
-- Data temporarily unavailable for the time period specified --

Lower 90 percent prediction limit for SSC by regression (PCODE 99409), milligrams per liter, [Suspended Fines]
 
-- Data temporarily unavailable for the time period specified --

Lower 90 percent prediction limit for SSC by regression (PCODE 99409), milligrams per liter, [Suspended Sands]
 
-- Data temporarily unavailable for the time period specified --

Lower 90 percent prediction limit for SSC by regression (PCODE 99409), milligrams per liter, [Total SSC, Sands and Fines]
 
-- Data temporarily unavailable for the time period specified --

Suspended sediment concentration, water, unfiltered, estimated by regression equation, milligrams per liter, [Suspended Fines]
 
-- Data temporarily unavailable for the time period specified --

Suspended sediment concentration, water, unfiltered, estimated by regression equation, milligrams per liter, [Suspended Sands]
 
-- Data temporarily unavailable for the time period specified --

Suspended sediment concentration, water, unfiltered, estimated by regression equation, milligrams per liter, [Total SSC, Sands and Fines]
 
-- Data temporarily unavailable for the time period specified --