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Current Datum Value: 8.26

Datums for 9439008, FORT STEVENS OR


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9439008, FORT STEVENS, OR
Status: Accepted (Oct 30 2003)
Units: Feet
Control Station: 9439040 Astoria, OR
T.M.: 120
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW8.61Mean Higher-High Water
MHW7.91Mean High Water
MTL4.59Mean Tide Level
MSL4.54Mean Sea Level
DTL4.30Mean Diurnal Tide Level
MLW1.28Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.18North American Vertical Datum of 1988
STND-8.26Station Datum
GT8.61Great Diurnal Range
MN6.62Mean Range of Tide
DHQ0.70Mean Diurnal High Water Inequality
DLQ1.28Mean Diurnal Low Water Inequality
HWI8.84Greenwich High Water Interval (in hours)
LWI2.32Greenwich 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
05/01/1981 - 11/30/1981




Products available at 9439008 FORT STEVENS, OR

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services