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Datums for 9439189, Rocky Point


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9439189, Rocky Point
Status: Accepted (Dec 5 2011)
Units: Feet
Control Station: 9439040 Astoria, OR
T.M.: 120
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW3.31Mean Higher-High Water
MHW2.75Mean High Water
MTL1.49Mean Tide Level
MSL1.42Mean Sea Level
DTL1.66Mean Diurnal Tide Level
MLW0.23Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-1.84Station Datum
GT3.32Great Diurnal Range
MN2.52Mean Range of Tide
DHQ0.57Mean Diurnal High Water Inequality
DLQ0.23Mean Diurnal Low Water Inequality
HWI1.06Greenwich High Water Interval (in hours)
LWI9.00Greenwich 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
HAT3.92Highest Astronomical Tide
HAT Date & Time12/29/1986 23:42HAT Date and Time
LAT-0.51Lowest Astronomical Tide
LAT Date & Time01/30/1987 10:06LAT Date and Time
Tidal Datum Analysis Periods
08/01/2004 - 10/31/2004
08/01/2005 - 10/31/2005
08/01/2006 - 10/31/2006
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 9439189 Rocky Point,

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