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Datums for 9446281, ALLYN WA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9446281, ALLYN, WA
Status: Accepted (Jun 25 2004)
Units: Feet
Control Station: 9447130 Seattle, WA
T.M.: 120
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW14.22Mean Higher-High Water
MHW13.29Mean High Water
MTL8.17Mean Tide Level
MSL8.18Mean Sea Level
DTL7.11Mean Diurnal Tide Level
MLW3.05Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-3.46Station Datum
GT14.22Great Diurnal Range
MN10.24Mean Range of Tide
DHQ0.93Mean Diurnal High Water Inequality
DLQ3.05Mean Diurnal Low Water Inequality
HWI1.23Greenwich High Water Interval (in hours)
LWI7.62Greenwich 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
02/01/1978 - 03/31/1978
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 9446281 ALLYN, WA

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