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Datums for 8454049, Quonset Point RI
NOTICE: All data values are relative to the MLLW.
Elevations on Mean Lower Low Water
Station: 8454049, Quonset Point, RI
Status: Accepted (May 22 2020)
Units: Feet
Control Station: 8452660 Newport, RI
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW4.11Mean Higher-High Water
MHW3.86Mean High Water
MTL2.01Mean Tide Level
MSL1.87Mean Sea Level
DTL2.06Mean Diurnal Tide Level
MLW0.16Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD882.24North American Vertical Datum of 1988
STND-23.01Station Datum
GT4.10Great Diurnal Range
MN3.70Mean Range of Tide
DHQ0.25Mean Diurnal High Water Inequality
DLQ0.15Mean Diurnal Low Water Inequality
HWI0.37Greenwich High Water Interval (in hours)
LWI5.88Greenwich Low Water Interval (in hours)
Max Tide7.32Highest Observed Tide
Max Tide Date & Time04/16/2007 11:12Highest Observed Tide Date & Time
Min Tide-2.73Lowest Observed Tide
Min Tide Date & Time02/11/2001 21:06Lowest Observed Tide Date & Time
HAT5.42Highest Astronomical Tide
HAT Date & Time10/16/1993 12:54HAT Date and Time
LAT-1.03Lowest Astronomical Tide
LAT Date & Time03/09/1993 06:36LAT Date and Time
Tidal Datum Analysis Periods
06/01/2000 - 05/31/2012
11/01/2012 - 10/31/2014
03/01/2015 - 02/28/2019
DHQ: 0.25
DLQ: 0.15
MN: 3.7
GT: 4.1
Datums for 8454049, Quonset Point, RI
All figures in feet relative to MLLW
MHHW: 4.11
MHW: 3.86
DTL: 2.06
MTL: 2.01
MSL: 1.87
MLW: 0.16
MLLW: 0
NAVD88: 2.24
Datums
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NOAA/NOS/CO-OPS

Showing datums for
8454049 Quonset Point, RI
Datum
Data Units
Feet
Meters
Epoch
Present (1983-2001)
Superseded (1960-1978)

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