Datums for 9440581, Cape Disappointment


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9440581, Cape Disappointment
Status: Accepted (Sep 24 2019)
Units: Feet
Control Station: 9439040 Astoria, OR
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW8.07Mean Higher-High Water
MHW7.37Mean High Water
MTL4.36Mean Tide Level
MSL4.30Mean Sea Level
DTL4.03Mean Diurnal Tide Level
MLW1.35Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.46North American Vertical Datum of 1988
STND-52.27Station Datum
GT8.07Great Diurnal Range
MN6.02Mean Range of Tide
DHQ0.70Mean Diurnal High Water Inequality
DLQ1.35Mean Diurnal Low Water Inequality
HWI8.62Greenwich High Water Interval (in hours)
LWI2.05Greenwich Low Water Interval (in hours)
Max Tide11.50Highest Observed Tide
Max Tide Date & Time03/10/2016 09:30Highest Observed Tide Date & Time
Min Tide-2.95Lowest Observed Tide
Min Tide Date & Time12/05/2017 03:12Lowest Observed Tide Date & Time
HAT10.36Highest Astronomical Tide
HAT Date & Time12/31/1986 20:06HAT Date and Time
LAT-2.66Lowest Astronomical Tide
LAT Date & Time06/22/1986 14:42LAT Date and Time
Tidal Datum Analysis Periods
08/01/2015 - 07/31/2018




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