U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8720216 PUBLICATION DATE: 01/23/2004
Name: RIBAULT RIVER, LAKE FOREST
FL
NOAA Chart: 11488 Latitude: 30° 23.9' N ( 30.39830)
USGS Quad: TROUT RIVER Longitude: 81° 41.9' W ( -81.69830)
To reach the tidal bench marks from the intersection of Edgewood Avenue and Lem
Turner Road in Jacksonville, proceed 0.55 km (0.34 mi) north on Lem Turner Road
to Ribault Scenic Drive, then turn left and proceed 1.6 km (1.0 mi) NW on
Ribault Scenic Drive to 2600 Ribault Scenic Drive. The bench marks are along
Ribault Scenic Drive. The tide gage and staff were located on a concrete dock,
30 m (100 ft) north of the NW corner of the 2600 Ribault Scenic Drive property.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 0216 A 1978
DESIGNATION: 872 0216 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 5104
AGENCY: National Ocean Survey (NOS) IDB PID#: BC1505
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 30° 23.9' N ( 30.39833) LONGITUDE: 81° 41.9' W ( -81.69833)
The primary bench mark is a disk set in a concrete seawall located near a
concrete dock and boat launch, 29 m (94 ft) NW of a concrete carport on the
property at 2600 Ribault Scenic Drive, 21 m (68 ft) east of the concrete dock, 6
m (19 ft) west of the boat launch, 2 m (8 ft) NW of a large pine tree, and at
ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8720216 PUBLICATION DATE: 01/23/2004
Name: RIBAULT RIVER, LAKE FOREST
FL
NOAA Chart: 11488 Latitude: 30° 23.9' N ( 30.39830)
USGS Quad: TROUT RIVER Longitude: 81° 41.9' W ( -81.69830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0216 C 1978
DESIGNATION: 872 0216 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 5106
AGENCY: National Ocean Survey (NOS) IDB PID#: BC1503
SETTING CLASSIFICATION: Concrete post OPUS PID:
LATITUDE: 30° 23.9' N ( 30.39806) LONGITUDE: 81° 41.9' W ( -81.69778)
The bench mark is a disk set in the top of a concrete post located near Restlawn
Cemetery and Restlawn Drive, 20 m (67 ft) SE of the SE corner of the house at
2603 Ribault Scenic Drive, 10 m (33 ft) north of the centerline of Ribault
Scenic Drive, 0.6 m (2 ft) north of a concrete block wall, and 3 cm (0.1 ft)
above ground level.
BENCH MARK STAMPING: 0216 D 1978
DESIGNATION: 872 0216 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 5107
AGENCY: National Ocean Survey (NOS) IDB PID#: BC1502
SETTING CLASSIFICATION: Concrete post OPUS PID:
LATITUDE: 30° 23.9' N ( 30.39833) LONGITUDE: 81° 41.9' W ( -81.69778)
The bench mark is a disk set in the top of a concrete post located at the NE
corner of Restlawn Cemetery, 22 m (73 ft) south of bench mark 0216 C 1978, 13 m
(43 ft) SW of the intersection of Ribault Scenic Drive and Restlawn Drive, 2.90
m (9.5 ft) south of a utility pole, 0.70 m (2.3 ft) north of the NE corner of
the cemetery, and at ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8720216 PUBLICATION DATE: 01/23/2004
Name: RIBAULT RIVER, LAKE FOREST
FL
NOAA Chart: 11488 Latitude: 30° 23.9' N ( 30.39830)
USGS Quad: TROUT RIVER Longitude: 81° 41.9' W ( -81.69830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0216 E 1978
DESIGNATION: 872 0216 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 5108
AGENCY: National Ocean Survey (NOS) IDB PID#: BC1501
SETTING CLASSIFICATION: Concrete post OPUS PID:
LATITUDE: 30° 23.9' N ( 30.39861) LONGITUDE: 81° 41.7' W ( -81.69556)
The bench mark is a disk set in the top of a concrete post located on the north
side of Ribault Scenic Drive and east of the cemetery, 34 m (110 ft) north of
the house at 2340 Ribault Scenic Drive, 7 m (23 ft) north of the centerline of
the street, 1 m (4 ft) east of a utility pole, and at ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8720216 PUBLICATION DATE: 01/23/2004
Name: RIBAULT RIVER, LAKE FOREST
FL
NOAA Chart: 11488 Latitude: 30° 23.9' N ( 30.39830)
USGS Quad: TROUT RIVER Longitude: 81° 41.9' W ( -81.69830)
T I D A L D A T U M S
Tidal datums at RIBAULT RIVER, LAKE FOREST based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: June 1978 - July 1978
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8720220 MAYPORT
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.850
MEAN HIGH WATER MHW = 0.819
North American Vertical Datum NAVD88 = 0.464
MEAN TIDE LEVEL MTL = 0.422
MEAN SEA LEVEL MSL = 0.413
MEAN LOW WATER MLW = 0.025
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
0216 A 1978 1.103 0.284
0216 C 1978 2.120 1.301
0216 D 1978 2.586 1.767
0216 E 1978 1.556 0.737
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8720216 PUBLICATION DATE: 01/23/2004
Name: RIBAULT RIVER, LAKE FOREST
FL
NOAA Chart: 11488 Latitude: 30° 23.9' N ( 30.39830)
USGS Quad: TROUT RIVER Longitude: 81° 41.9' W ( -81.69830)
D E F I N I T I O N S
Mean Sea Level (MSL) is a tidal datum determined over a 19-year National Tidal
Datum Epoch. It pertains to local mean sea level and should not be confused
with the fixed datums of North American Vertical Datum of 1988 (NAVD88).
NAVD88 is a fixed datum derived from a simultaneous, least squares, minimum
constraint adjustment of Canadian/Mexican/United States leveling observations.
Local mean sea level observed at Father Point/Rimouski, Canada was held fixed as
the single initial constraint. NAVD88 replaces NGVD29 as the national
standard geodetic reference for heights. Bench mark elevations relative to
NAVD88 are available from NGS through the World Wide Web at
National Geodetic Survey.
NGVD29 is a fixed datum adopted as a national standard geodetic reference for
heights but is now considered superseded. NGVD29 is sometimes referred to as
Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological
Survey Topographic Quads. NGVD29 was originally derived from a general
adjustment of the first-order leveling networks of the U.S. and Canada after
holding mean sea level observed at 26 long term tide stations as fixed.
Numerous local and wide-spread adjustments have been made since establishment in
1929. Bench mark elevations relative to NGVD29 are available from the National
Geodetic Survey (NGS) data base via the World Wide Web at
National Geodetic Survey.
NAVD88 and NGVD29 are fixed geodetic datums whose elevation relationships to
local MSL and other tidal datums may not be consistent from one location to
another.
The Vertical Mark Number (VM#) and PID# shown on the bench mark sheet are unique
identifiers for bench marks in the tidal and geodetic databases, respectively.
Each bench mark in either database has a single, unique VM# and/or PID# assigned.
Where both VM# and PID# are indicated, both tidal and geodetic elevations are
available for the bench mark listed. The NGS's Integrated Data Base (IDB PID)
provides geodetic datum based on traditionally leveled and bluebooked ties to
the National Spatial Reference System(NSRS) https://www.ngs.noaa.gov/datasheets/.
The NGS Online Positioning User Service (OPUS PID) provides geodetic datum based
on GPS position & tie it to the NSRS https://www.ngs.noaa.gov/OPUS/.
The NAVD88 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have NAVD88 elevations.
The NAVD88 elevation relationship shown in the table is derived from an average
of several bench mark elevations relative to tide station datum. As a result of
this averaging, NAVD88 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from NAVD88 elevations listed for
each bench mark in the NGS database.