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Datums for 8454000, Providence RI


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8454000, Providence, RI
Status: Accepted (Apr 17 2003)
Units: Feet
Control Station:
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW4.84Mean Higher-High Water
MHW4.59Mean High Water
MTL2.39Mean Tide Level
MSL2.25Mean Sea Level
DTL2.42Mean Diurnal Tide Level
MLW0.18Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD882.47North American Vertical Datum of 1988
STND-3.49Station Datum
GT4.84Great Diurnal Range
MN4.42Mean Range of Tide
DHQ0.25Mean Diurnal High Water Inequality
DLQ0.18Mean Diurnal Low Water Inequality
HWI0.48Greenwich High Water Interval (in hours)
LWI5.92Greenwich Low Water Interval (in hours)
Max Tide17.51Highest Observed Tide
Max Tide Date & Time09/21/1938 00:00Highest Observed Tide Date & Time
Min Tide-3.59Lowest Observed Tide
Min Tide Date & Time01/05/1959 21:36Lowest Observed Tide Date & Time
HAT6.52Highest Astronomical Tide
HAT Date & Time06/14/1995 01:12HAT Date and Time
LAT-1.23Lowest Astronomical Tide
LAT Date & Time03/09/1993 06:30LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 8454000 Providence, RI

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