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Datums for 9440574, NORTH JETTY WA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9440574, NORTH JETTY, WA
Status: Accepted (Oct 30 2003)
Units: Feet
Control Station: 9439040 Astoria, OR
T.M.: 120
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW7.75Mean Higher-High Water
MHW7.08Mean High Water
MTL4.15Mean Tide Level
MSL4.09Mean Sea Level
DTL3.87Mean Diurnal Tide Level
MLW1.23Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.25North American Vertical Datum of 1988
STND-3.64Station Datum
GT7.75Great Diurnal Range
MN5.85Mean Range of Tide
DHQ0.67Mean Diurnal High Water Inequality
DLQ1.23Mean Diurnal Low Water Inequality
HWI8.25Greenwich High Water Interval (in hours)
LWI1.80Greenwich Low Water Interval (in hours)
Max TideHighest Observed Tide
Max Tide Date & Time Highest Observed Tide Date & Time
Min TideLowest Observed Tide
Min Tide Date & Time Lowest Observed Tide Date & Time
HATHighest Astronomical Tide
HAT Date & Time HAT Date and Time
LATLowest Astronomical Tide
LAT Date & Time LAT Date and Time
Tidal Datum Analysis Periods
07/01/1983 - 10/31/1983
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 9440574 NORTH JETTY, WA

Revised: 08/08/2018
NOAA / National Ocean Service
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