U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 8720226 PUBLICATION DATE: 03/19/2021
Name: SOUTHBANK RIVERWALK, ST JOHNS RIVER
FL
NOAA Chart: 11492 Latitude: 30° 19.2' N ( 30.32000)
USGS Quad: JACKSONVILLE Longitude: 81° 39.5' W ( -81.65830)
To reach the tide station from the junction of Interstate 10 and Interstate 95,
proceed east on Interstate 95 South over the Fuller Warren Bridge for
approximately 2.3 km (1.4 mi) to exit 350B toward San Marco. Turn left onto Palm
Ave and go north about 0.3 km (0.2 mi) to Prudential Drive. Turn right on
Prudential Drive and travel east about 0.3 km (0.2 mi) to Main Street S. Turn
left on Main Street S and go north about 0.3 km (0.2 mi) to Gulf Life Drive.
Turn left on Gulf Life Drive and go west for about 45 m (150 ft) and turn right
into the parking lot for the Museum of Science & History (MOSH). Proceed north
for about 120 m (393 ft) to the north end of the parking lot. On foot, follow
the sidewalk leading north from the parking lot for about 85 m (278 ft). The
station is located on an elevated aluminum structure approximately 4 m (13 ft)
north of the pedestrian ramp leading up to the Main Street Bridge and
approximately 15 m (50 ft) west of the Main Street Bridge.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 0226 E 1995
DESIGNATION: 872 0226 E TIDAL
MONUMENTATION: Flange-encased Rod VM#: 13476
AGENCY: National Ocean Service (NOS) IDB PID#: DI9223
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: DI9223
LATITUDE: 30° 19.2' N ( 30.31925) LONGITUDE: 81° 39.7' W ( -81.66175)
The primary bench mark is a flange-encased rod located on the west side of the
boat ramp at the Marine Museum, 82.3 m (270.0 ft) north of the approximate
center of Museum Street, 43.6 m (143.0 ft) east of the east side of the Acosta
Bridge overpass spanning the Saint Johns River, 17.3 m (56.6 ft) SW of the SW
end of the boat ramp, 3.8 m (12.4 ft) NE of a power pole with one guy wire and
light attached, 0.8 m (2.7 ft) NE of a 2-inch galvanized pipe witness post, 0.6
m (1.9 ft) NNW of the north side of the boat ramp parking lot, and 0.2 m (0.6
ft) above the level of the parking lot. The datum point is recessed 0.1 m (0.3
ft) below the level of the NOS logo cap, being the top of a stainless steel rod,
driven to refusal at a depth of 24.3 m (79.8 ft) encased in a NOS logo cap flush
with the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8720226 PUBLICATION DATE: 03/19/2021
Name: SOUTHBANK RIVERWALK, ST JOHNS RIVER
FL
NOAA Chart: 11492 Latitude: 30° 19.2' N ( 30.32000)
USGS Quad: JACKSONVILLE Longitude: 81° 39.5' W ( -81.65830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0226 C 1995
DESIGNATION: 872 0226 C TIDAL
MONUMENTATION: Bench Mark disk VM#: 13474
AGENCY: National Ocean Service (NOS) IDB PID#: DL5774
SETTING CLASSIFICATION: Concrete bridge abutment OPUS PID:
LATITUDE: 30° 19.1' N ( 30.31808) LONGITUDE: 81° 39.8' W ( -81.66264)
The bench mark is a disk set flush in the S end railroad abutment near the
Acosta Bridge overpass spanning the St. Johns River, located 76.2 m (250.0 ft)
SW of bench mark 0226 E 1995, 24.1 m (79.0 ft) SW of the SW corner of a
chainlink fence at the SW corner of the parking lot, 20.7 m (68.0 ft) NW of the
NW corner of a metal high voltage building, 15.8 m (51.7 ft) NNW of transformer
box No. 1000, 15.6 m (51.3 ft) SW of a storm manhole, 13.7 m (45.0 ft) west of
the Acosta Bridge overpass, and 1.3 m (4.3 ft) east of the east rail of the
northbound Florida East Coast Railroad tracks.
BENCH MARK STAMPING: 0226 D 1995
DESIGNATION: 872 0226 D TIDAL
MONUMENTATION: Bench Mark disk VM#: 13475
AGENCY: National Ocean Service (NOS) IDB PID#: DL5786
SETTING CLASSIFICATION: Concrete bridge abutment OPUS PID:
LATITUDE: 30° 19.2' N ( 30.31975) LONGITUDE: 81° 39.5' W ( -81.65914)
The bench mark is a disk set flush in the bridge abutments at the SW end of the
Main Street Bridge spanning the St. Johns River, 5.4 m (17.6 ft) NNE of the NE
corner of the Science and History Museum parking lot, 0.8 m (2.6 ft) west of
aluminum light pole No. 1351 (430), 0.4 m (1.2 ft) E of the S end of the sea
wall on the W side of the Main Street Bridge, and 0.6 m (2.0 ft) below the level
of the bridge.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8720226 PUBLICATION DATE: 03/19/2021
Name: SOUTHBANK RIVERWALK, ST JOHNS RIVER
FL
NOAA Chart: 11492 Latitude: 30° 19.2' N ( 30.32000)
USGS Quad: JACKSONVILLE Longitude: 81° 39.5' W ( -81.65830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0226 J 2014
DESIGNATION: 872 0226 J
MONUMENTATION: Bench Mark disk VM#: 21048
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Bridge support OPUS PID:
LATITUDE: 30° 19.1' N ( 30.31803) LONGITUDE: 81° 39.6' W ( -81.65936)
The mark is a disk 12.4 m (40.8 ft) S of the centerline of Riverplace Boulevard
and Museum Circle, 11.5 m (37.6 ft) E of the approximate centerline of Main
Street heading S, 5.7 m (18.6 ft) ENE of the stoplight post at the corner of
Museum Circle and Main Street heading S, 1.8 m (5.9 ft) N of the 0.6 m (2.0 ft)
tall kick block on the elevated sidewalk directly S of bridge support structure
number 15. The mark is set 1.5 m (5.0 ft) above ground on the Main Street
bridge support number 15.
BENCH MARK STAMPING: 0226 H 2014
DESIGNATION: 872 0226 H
MONUMENTATION: Bench Mark disk VM#: 21049
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete seawall OPUS PID:
LATITUDE: 30° 19.2' N ( 30.32047) LONGITUDE: 81° 39.6' W ( -81.65981)
The bench mark is a disk 73.6 m (241.6 ft) due W of the MWWL sensor for the
tidal station, 35.4 m (116.0 ft) NE of the Friendship park and fountain
dedication plaque mounted on a large concrete monument on the W edge of the
large fountain, 19.4 m (63.8 ft) E of the W most concrete piling for the
Jacksonville water taxi floating dock, 15.0 m (49.3 ft) N of the S most edge of
the Friendship park fountain, 6.0 m (19.8 ft) NE of the light post due N of the
centerline of the fountain, 0.5 m (1.7 ft) N of the black guardrail at the edge
of the bulkhead, and 0.4 m (1.2 ft) S of the edge of the water.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8720226 PUBLICATION DATE: 03/19/2021
Name: SOUTHBANK RIVERWALK, ST JOHNS RIVER
FL
NOAA Chart: 11492 Latitude: 30° 19.2' N ( 30.32000)
USGS Quad: JACKSONVILLE Longitude: 81° 39.5' W ( -81.65830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0226 K 2014
DESIGNATION: 872 0226 K
MONUMENTATION: Bench Mark disk VM#: 21051
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete wall OPUS PID:
LATITUDE: 30° 19.0' N ( 30.31694) LONGITUDE: 81° 39.5' W ( -81.65889)
The mark is a disk located 46.6 m (153.0 ft) SW of the SW most corner of the
Suddath building, 18.1 m (59.3 ft) W of light post number 931 located at the
edge of Main Street heading N, 6.9 m (22.7 ft) SW of the electrical box below
the Main Street bridge located between bridge supports number 6 and 7, 3.0 m
(10.0 ft) W of the centerline of the sidewalk on the left side of Main Street
heading N, 1.8 m (6.0 ft) N of bridge support number 6. The mark is set
vertically 0.6 m (2.1 ft) above the tiling under the Main Street bridge on the
concrete kick block.
BENCH MARK STAMPING: CESAJ PM-W
DESIGNATION: 872 0226 M
MONUMENTATION: Bench Mark disk VM#: 22147
AGENCY: USACE IDB PID:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 30° 19.2' N ( 30.32042) LONGITUDE: 81° 39.6' W ( -81.65981)
New bench mark set by USACE in 2015, located at edge of new bridge connecting
the river walk, located in between bench mark 872 0226 H and the tidal station.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8720226 PUBLICATION DATE: 03/19/2021
Name: SOUTHBANK RIVERWALK, ST JOHNS RIVER
FL
NOAA Chart: 11492 Latitude: 30° 19.2' N ( 30.32000)
USGS Quad: JACKSONVILLE Longitude: 81° 39.5' W ( -81.65830)
T I D A L D A T U M S
Tidal datums at SOUTHBANK RIVERWALK, ST JOHNS RIVER based on:
LENGTH OF SERIES: 5 YEARS
TIME PERIOD: 04/02-03/05, 02/15-01/17
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8720218 BAR PILOTS DOCK, ST JOHNS RIVER
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (09/11/2017) = 2.085
MEAN HIGHER HIGH WATER MHHW = 0.595
MEAN HIGH WATER MHW = 0.575
North American Vertical Datum NAVD88 = 0.397
MEAN SEA LEVEL MSL = 0.324
MEAN TIDE LEVEL MTL = 0.303
MEAN LOW WATER MLW = 0.029
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (04/14/2004) = -0.542
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
0226 E 1995 1.541 0.966
0226 C 1995 3.561 2.986
0226 D 1995 1.614 1.039
0226 J 2014 3.467 2.892
0226 H 2014 1.653 1.078
0226 K 2014 2.719 2.144
CESAJ PM-W 1.873 1.298
Foot Notes:
Benchmark CESAJ PM-W is based on one differential leveling connection and does
not meet the quality control standards of the NOS. Therefore, caution should be
used when deriving elevations from this mark.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 8720226 PUBLICATION DATE: 03/19/2021
Name: SOUTHBANK RIVERWALK, ST JOHNS RIVER
FL
NOAA Chart: 11492 Latitude: 30° 19.2' N ( 30.32000)
USGS Quad: JACKSONVILLE Longitude: 81° 39.5' W ( -81.65830)
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.