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Datums for 8452660, Newport RI


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8452660, Newport, RI
Status: Accepted (Apr 17 2003)
Units: Feet
Control Station:
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW3.85Mean Higher-High Water
MHW3.61Mean High Water
MTL1.88Mean Tide Level
MSL1.74Mean Sea Level
DTL1.93Mean Diurnal Tide Level
MLW0.14Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD882.04North American Vertical Datum of 1988
STND-1.89Station Datum
GT3.85Great Diurnal Range
MN3.46Mean Range of Tide
DHQ0.25Mean Diurnal High Water Inequality
DLQ0.14Mean Diurnal Low Water Inequality
HWI0.27Greenwich High Water Interval (in hours)
LWI5.92Greenwich Low Water Interval (in hours)
Max Tide13.31Highest Observed Tide
Max Tide Date & Time09/21/1938 00:00Highest Observed Tide Date & Time
Min Tide-3.09Lowest Observed Tide
Min Tide Date & Time02/03/1976 00:00Lowest Observed Tide Date & Time
HAT5.16Highest Astronomical Tide
HAT Date & Time04/27/1994 01:18HAT Date and Time
LAT-0.88Lowest Astronomical Tide
LAT Date & Time01/21/1992 06:42LAT 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 8452660 Newport, RI

Revised: 08/08/2018
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