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Datums for 9439011, Hammond OR


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9439011, Hammond, OR
Status: Accepted (Jul 12 2017)
Units: Feet
Control Station: 9439040 Astoria, OR
T.M.: 120
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW8.36Mean Higher-High Water
MHW7.65Mean High Water
MTL4.45Mean Tide Level
MSL4.38Mean Sea Level
DTL4.18Mean Diurnal Tide Level
MLW1.26Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.06North American Vertical Datum of 1988
STND-2.50Station Datum
GT8.35Great Diurnal Range
MN6.39Mean Range of Tide
DHQ0.71Mean Diurnal High Water Inequality
DLQ1.26Mean Diurnal Low Water Inequality
HWI8.85Greenwich High Water Interval (in hours)
LWI2.31Greenwich Low Water Interval (in hours)
Max Tide11.68Highest Observed Tide
Max Tide Date & Time11/24/2011 19:24Highest Observed Tide Date & Time
Min Tide-3.22Lowest Observed Tide
Min Tide Date & Time02/06/1989 02:48Lowest 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
05/01/2012 - 04/30/2014




Products available at 9439011 Hammond, OR

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