NOTICE: Data for determining a datum at this station was collected using non-standard methodologies and may not meet CO-OPS highest level of accuracy of 2 cm (0.8 in). The estimated error associated with the average six-minute water level observations relative to datum is expected to be within +/- 4.0 - 13.0 cm (1.6 - 5.1 in) at 95% confidence. Recognizing that these data can be used for certain applications CO-OPS is making these data available to its users with restraint. Users are cautioned to consider the accuracy of these data before using them for critical navigational or coastal engineering purposes.

Datums for 8760721, Pilottown LA


NOTICE OF PROVISIONAL DATUM These datums and any data referred to said datum are PROVISIONAL and subject to revision until they have been thoroughly reviewed and received final approval. Subsequent review based on field inspections and additional measurements may result in revisions to the data and datums. Data users are cautioned to consider the conditional nature of this information before using it for critical decisions such as those that concern physical or public safety. Only after meeting all standards for quality control assurance will the datums be classified as Accepted Datums.
NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8760721, Pilottown, LA
Status: Accepted (Oct 5 2020)
Units: Feet
Control Station: 8761724 Grand Isle, LA
T.M.: 0
Epoch: 2012-2016
Datum: MLLW
DatumValueDescription
MHHW0.80Mean Higher-High Water
MHW0.80Mean High Water
MTL0.40Mean Tide Level
MSL0.39Mean Sea Level
DTL0.40Mean Diurnal Tide Level
MLW0.00Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-5.85Station Datum
GT0.81Great Diurnal Range
MN0.80Mean Range of Tide
DHQ0.00Mean Diurnal High Water Inequality
DLQ0.01Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide5.41Highest Observed Tide
Max Tide Date & Time08/29/2012 03:24Highest Observed Tide Date & Time
Min Tide-1.96Lowest Observed Tide
Min Tide Date & Time12/14/2012 16:00Lowest Observed Tide Date & Time
HAT1.55Highest Astronomical Tide
HAT Date & Time12/31/1986 03:24HAT Date and Time
LAT-0.75Lowest Astronomical Tide
LAT Date & Time12/31/1986 15:06LAT Date and Time
Tidal Datum Analysis Periods
09/01/2013 - 08/31/2016
09/01/2018 - 08/31/2019




Products available at 8760721 Pilottown, LA