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Current Datum Value: 17.79

Datums for 9448009, Spee-Bi-Dah WA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9448009, Spee-Bi-Dah, WA
Status: Accepted (Sep 30 2014)
Units: Feet
Control Station: 9447130 Seattle, WA
T.M.: 120
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW11.22Mean Higher-High Water
MHW10.37Mean High Water
MTL6.58Mean Tide Level
MSL6.57Mean Sea Level
DTL5.62Mean Diurnal Tide Level
MLW2.80Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD881.96North American Vertical Datum of 1988
STND-17.79Station Datum
GT11.22Great Diurnal Range
MN7.56Mean Range of Tide
DHQ0.86Mean Diurnal High Water Inequality
DLQ2.80Mean Diurnal Low Water Inequality
HWI0.39Greenwich High Water Interval (in hours)
LWI6.60Greenwich 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
HAT13.43Highest Astronomical Tide
HAT Date & Time01/01/1983 15:06HAT Date and Time
LAT-4.39Lowest Astronomical Tide
LAT Date & Time06/22/1986 18:36LAT Date and Time
Tidal Datum Analysis Periods
06/01/2014 - 08/31/2014




Products available at 9448009 Spee-Bi-Dah, WA

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