Datums for 9447130, Seattle WA

NOTICE: All data values are relative to the STND.

Elevations on Station Datum

Station: 9447130, Seattle, WA
Status: Accepted (Apr 17 2003)
Units: Meters
Control Station:
T.M.: 0
Epoch: 1983-2001
Datum: STND
MHHW5.882Mean Higher-High Water
MHW5.618Mean High Water
MTL4.451Mean Tide Level
MSL4.443Mean Sea Level
DTL4.151Mean Diurnal Tide Level
MLW3.284Mean Low Water
MLLW2.419Mean Lower-Low Water
NAVD883.134North American Vertical Datum of 1988
STND0.000Station Datum
GT3.462Great Diurnal Range
MN2.334Mean Range of Tide
DHQ0.264Mean Diurnal High Water Inequality
DLQ0.864Mean Diurnal Low Water Inequality
HWI0.400Greenwich High Water Interval (in hours)
LWI6.640Greenwich Low Water Interval (in hours)
Max Tide7.029Highest Observed Tide
Max Tide Date & Time12/27/2022 21:42Highest Observed Tide Date & Time
Min Tide0.884Lowest Observed Tide
Min Tide Date & Time01/04/1916 00:00Lowest Observed Tide Date & Time
HAT6.475Highest Astronomical Tide
HAT Date & Time01/16/2032 15:42HAT Date and Time
LAT1.105Lowest Astronomical Tide
LAT Date & Time06/15/2026 18:36LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001

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