Datums for 8637712, Jamestown Wharf VA


NOTICE: Data collected from 2017 and beyond are from United States Geological Survey (USGS) water level stations that are subject to NOAA's National Ocean Service (NOS) routine quality assurance procedures on a monthly basis with data available for the previous month. For access to the real-time data at this location visit USGS at: https://nwis.waterdata.usgs.gov/nwis/uv?site_no=02042770.
NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8637712, Jamestown Wharf, VA
Status: Accepted (May 29 2020)
Units: Feet
Control Station: 8638610 Sewells Point, VA
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW2.23Mean Higher-High Water
MHW2.05Mean High Water
MTL1.09Mean Tide Level
MSL1.10Mean Sea Level
DTL1.11Mean Diurnal Tide Level
MLW0.13Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD881.23North American Vertical Datum of 1988
STND1.05Station Datum
GT2.24Great Diurnal Range
MN1.93Mean Range of Tide
DHQ0.18Mean Diurnal High Water Inequality
DLQ0.13Mean Diurnal Low Water Inequality
HWI4.44Greenwich High Water Interval (in hours)
LWI11.12Greenwich Low Water Interval (in hours)
Max Tide4.86Highest Observed Tide
Max Tide Date & Time04/01/2020 10:36Highest Observed Tide Date & Time
Min Tide-0.88Lowest Observed Tide
Min Tide Date & Time01/22/2019 12:18Lowest Observed Tide Date & Time
HAT2.89Highest Astronomical Tide
HAT Date & Time10/16/1989 17:42HAT Date and Time
LAT-0.49Lowest Astronomical Tide
LAT Date & Time01/20/1996 10:18LAT Date and Time
Tidal Datum Analysis Periods
12/01/2018 - 11/30/2019




Products available at 8637712 Jamestown Wharf, VA