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Datums for 8574680, Baltimore, Fort McHenry, Patapsco River MD


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8574680, Baltimore, Fort McHenry, Patapsco River, MD
Status: Accepted (Oct 6 2011)
Units: Feet
Control Station:
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.66Mean Higher-High Water
MHW1.37Mean High Water
MTL0.79Mean Tide Level
MSL0.81Mean Sea Level
DTL0.83Mean Diurnal Tide Level
MLW0.22Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.84North American Vertical Datum of 1988
STND-4.10Station Datum
GT1.66Great Diurnal Range
MN1.14Mean Range of Tide
DHQ0.30Mean Diurnal High Water Inequality
DLQ0.22Mean Diurnal Low Water Inequality
HWI11.54Greenwich High Water Interval (in hours)
LWI5.70Greenwich Low Water Interval (in hours)
Max Tide8.15Highest Observed Tide
Max Tide Date & Time09/19/2003 12:06Highest Observed Tide Date & Time
Min Tide-5.10Lowest Observed Tide
Min Tide Date & Time01/24/1908 21:00Lowest Observed Tide Date & Time
HAT2.28Highest Astronomical Tide
HAT Date & Time06/21/1986 10:30HAT Date and Time
LAT-0.58Lowest Astronomical Tide
LAT Date & Time01/21/2000 17:24LAT 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 8574680 Baltimore, Fort McHenry, Patapsco River, MD

Revised: 08/08/2018
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Web site owner: Center for Operational Oceanographic Products and Services