Datums for 8415490, Rockland ME


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8415490, Rockland, ME
Status: Accepted (Apr 17 2003)
Units: Feet
Control Station: 8418150 Portland, ME
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW10.57Mean Higher-High Water
MHW10.17Mean High Water
MTL5.28Mean Tide Level
MSL5.33Mean Sea Level
DTL5.28Mean Diurnal Tide Level
MLW0.39Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-3.62Station Datum
GT10.57Great Diurnal Range
MN9.78Mean Range of Tide
DHQ0.40Mean Diurnal High Water Inequality
DLQ0.39Mean Diurnal Low Water Inequality
HWI3.43Greenwich High Water Interval (in hours)
LWI9.61Greenwich Low Water Interval (in hours)
Max Tide14.17Highest Observed Tide
Max Tide Date & Time03/18/1976 00:00Highest Observed Tide Date & Time
Min Tide-2.61Lowest Observed Tide
Min Tide Date & Time03/18/1976 00:00Lowest Observed Tide Date & Time
HAT12.85Highest Astronomical Tide
HAT Date & Time12/04/1994 16:18HAT Date and Time
LAT-2.22Lowest Astronomical Tide
LAT Date & Time11/05/1998 22:30LAT Date and Time
Tidal Datum Analysis Periods
07/01/1973 - 06/30/1987




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