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Streamflow Measurements for the Nation

! Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 12020565 CHEHALIS RIVER AT DRYAD, WA
Lewis County, Washington
Hydrologic Unit Code 17100103
Latitude  46°37'54", Longitude 123°14'51" NAD27
Gage datum 250 feet above NGVD29
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Meas.
Number		   Date       Time Time
Datum		 Measurement
Used?		   Who Measuring
Agency		 Stream
flow
(ft3/s)		 Gage
Height
(ft)		 GH
Change
(ft)		 Meas.
Duration
(hr)		 Meas.
Rated		   Control Flow
Adjust.
Code 		 Channel
Number		 Channel
Name		 Meas.
type 		 Stream
flow
method 		 Velocity
method 		 Channel
flow
(ft3/s)		 Channel
width
(ft)		 Channel
area
(ft2)		 Channel
vel.
(ft/s)		 Channel
stability 		 Channel
material 		 Channel
evenness 		 Long.
vel.
desc. 		 Horz.
vel.
desc. 		 Vert.
vel.
desc. 		 Channel
loc.
code 		 Channel
loc.
dist.(ft)
982007-09-11 12:55PDTYesPHLUSGS43.57.820.000.50GoodClearNONE1Imported Channel 1WADEunspeunkno43.577.599.00.44UNSPUNSPUNSPunknUNSPUNSPUNSP
971998-08-24 18:40PDTYesGWOUSGS44.98.050.000.50GoodClearNONE1Imported Channel 1WADEunspeunkno44.955.070.10.64UNSPUNSPUNSPunknUNSPUNSPUNSP
961998-06-19 13:55PDTYesGWOUSGS1428.640.000.60GoodClearNONE1Imported Channel 1WADEunspeunkno14259.01041.37UNSPUNSPUNSPunknUNSPUNSPUNSP
951998-04-08 14:00PDTYesGWOUSGS5109.76-0.011.00GoodClearNONE1Imported Channel 1CRANunspeunkno51087.04251.20UNSPUNSPUNSPunknUNSPUNSPUNSP
941998-02-06 08:15PSTYesGWOUSGS74210.250.001.00GoodClearNONE1Imported Channel 1CRANunspeunkno74288.04732.57UNSPUNSPUNSPunknUNSPUNSPUNSP