Datums for 9446484, Tacoma WA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9446484, Tacoma, WA
Status: Superseded (Apr 17 2003) (Accepted Aug 16 1999)
Units: Feet
Control Station: 9447130 Seattle, WA
T.M.: 120
Epoch: 1960-1978
Datum: MLLW
DatumValueDescription
MHHW11.83Mean Higher-High Water
MHW10.96Mean High Water
MTL6.91Mean Tide Level
MSL6.87Mean Sea Level
DTL5.92Mean Diurnal Tide Level
MLW2.85Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-0.38Station Datum
GT11.82Great Diurnal Range
MN8.11Mean Range of Tide
DHQ0.87Mean Diurnal High Water Inequality
DLQ2.85Mean Diurnal Low Water Inequality
HWI0.48Greenwich High Water Interval (in hours)
LWI6.72Greenwich Low Water Interval (in hours)
Max Tide15.11Highest Observed Tide
Max Tide Date & Time12/17/2012 16:12Highest Observed Tide Date & Time
Min Tide-4.49Lowest Observed Tide
Min Tide Date & Time11/26/2007 07:06Lowest Observed Tide Date & Time
HAT13.67Highest Astronomical Tide
HAT Date & Time01/16/2032 15:42HAT Date and Time
LAT-4.33Lowest Astronomical Tide
LAT Date & Time06/15/2026 18:36LAT Date and Time
Tidal Datum Analysis Periods
08/01/1997 - 02/28/1999




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