U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 8
Station ID: 8721147 PUBLICATION DATE: 07/03/2024
Name: PONCE DE LEON INLET SOUTH
FL
NOAA Chart: 11484 Latitude: 29° 3.8' N ( 29.06333)
USGS Quad: NEW SMYRNA BEACH Longitude: 80° 55.0' W ( -80.91583)
The Aquatrak (tide gage) is about 6.9 mi (11.2 km) southeast of port orange, 5.2
mi (8.4 km) north of Edgewater, 2.7 mi (4.3 km) north-northeast of New Smyrna
Beach, in Section 5, Township 17 South, Range 34 East. To reach the Aquatrak
(tide gage) from the intersection of State Highway 44 East (Live Oak Avenue) and
State Highway A1A (Lytle Avenue) in New Smyrna Beach, go East on State Highway
A1A (Lytle Avenue) for 1.2 mi (1.9 km) to the junction of Peninsula Avenue on
the left, turn left on Peninsula Avenue and go north for 0.6 mi (1.0 km) to the
intersection of State Highway 44 (Flagler Avenue), continue north on Peninsula
Avenue for 2.0 mi (3.2 km) to the entrance of the Ponce De Leon Inlet Coast
Guard Station, passing through the gate, go west for about 230.0 ft (70.1 m) to
the first driveway on the left, turn left on the driveway and go south for about
350.0 ft (106.7 m) to the seawall, now by boat go west about 300.0 ft (91.4 m)
to the Aquatrak (tide gage) attached to an (old walkway) pier.
T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 8
Station ID: 8721147 PUBLICATION DATE: 07/03/2024
Name: PONCE DE LEON INLET SOUTH
FL
NOAA Chart: 11484 Latitude: 29° 3.8' N ( 29.06333)
USGS Quad: NEW SMYRNA BEACH Longitude: 80° 55.0' W ( -80.91583)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING:
DESIGNATION: PONCE
MONUMENTATION: Survey disk VM#: 24634
AGENCY: IDB PID#:
SETTING CLASSIFICATION: Piling OPUS PID#: BBHC29
LATITUDE: 29° 3.8' N ( 29.06347) LONGITUDE: 80° 55.0' W ( -80.91586)
The bench mark is a disk located 2.5 m (8.3 ft) NW of the SE corner of the
concrete piling, 1.8 m (5.9 ft) SW of the northeast corner of the concrete
piling and 1.0 m (3.3 ft) west of the 6-inch PVC pipe (aqua trak well).
BENCH MARK STAMPING: 1 1973
DESIGNATION: 872 1147 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 5296
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Seawall OPUS PID#: AQ1522
LATITUDE: 29° 3.8' N ( 29.06342) LONGITUDE: 80° 54.9' W ( -80.91472)
The bench mark is a disk located 115.8 m (380.0 ft) SW of tidal mark 1147 B,
about 69.5 m (228.0 ft) SE of tidal mark 1147 A, about (54.9 m (180.0 ft) west
of the SE end of the seawall, 17.2 m (56.5 ft) NE of the aquatrak (tide gage),
14.6 m (47.9 ft) SW of the SW corner of the fuel storage area barrier wall, 13.1
m (43.1 ft) east of the SE corner of the boat ramp, 0.3 m (1.0 ft) south of a
carsonite witness post, and 0.3 m (0.9 ft) north of the north face of the
seawall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 8721147 PUBLICATION DATE: 07/03/2024
Name: PONCE DE LEON INLET SOUTH
FL
NOAA Chart: 11484 Latitude: 29° 3.8' N ( 29.06333)
USGS Quad: NEW SMYRNA BEACH Longitude: 80° 55.0' W ( -80.91583)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4 1973
DESIGNATION: 872 1147 TIDAL 4
MONUMENTATION: Tidal Station disk VM#: 5299
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete building base OPUS PID:
LATITUDE: 29° 3.9' N ( 29.06492) LONGITUDE: 80° 54.9' W ( -80.91550)
The bench mark is a disk set flush in a concrete foundation near the center of
the east side of the garage in the garage doorway, 0.15 m (0.5 ft) south of the
south side of the center building support between the two center doorways.
BENCH MARK STAMPING: 1147 B 1996
DESIGNATION: 872 1147 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 18055
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Navigation structure base OPUS PID:
LATITUDE: 29° 3.9' N ( 29.06439) LONGITUDE: 80° 54.9' W ( -80.91428)
The bench mark is a disk set flush in the SW corner of the concrete base of a
navigation aid structure, west of the stations property fence, the concrete base
projecting about 0.15 m (0.5 ft) above the level of the ground, about 134.11 m
(440.0 ft) ESE of bench mark 4 1973, about 115.82 m (380.0 ft) NE of bench mark
1 1973, 19.96 m (65.5 ft) NE of the NE corner of the Billeting and Dining Hall
Building, 6.71 m (22.0 ft) SW of the approximate centerline of the south
entrance gate, 5.54 m (18.2 ft) west of a 6.0 ft tall chain link property line
fence, 4.33 m (14.2 ft) south of the approximate centerline of the station road,
0.18 m (0.6 ft) NE of the SW corner of the concrete base, and 0.18 m (0.6 ft)
east of a carsonite witness post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 8721147 PUBLICATION DATE: 07/03/2024
Name: PONCE DE LEON INLET SOUTH
FL
NOAA Chart: 11484 Latitude: 29° 3.8' N ( 29.06333)
USGS Quad: NEW SMYRNA BEACH Longitude: 80° 55.0' W ( -80.91583)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: PDI-26 1974 JAX FLA
DESIGNATION: PDI 26
MONUMENTATION: Survey disk VM#: 18058
AGENCY: US Army Corps of Engineers (USE) IDB PID#:
SETTING CLASSIFICATION: Concrete Pad OPUS PID#: DK6691
LATITUDE: 29° 3.8' N ( 29.06349) LONGITUDE: 80° 54.9' W ( -80.91542)
The bench mark is a disk set in the SW corner of the concrete helicopter pad,
11.28 m (37.0 ft) south of the NW corner of the concrete helicopter pad, 7.32 m
(24.0 ft) NNW of a carsonite witness post for bench mark 1147 A 1996, 4.27 m
(14.0 ft) north of a concrete sea wall, 3.96 m (13.0 ft) NNE of bench mark 1147
A 1996, and 0.91 m (3.0 ft) NNE of the SW corner of the helicopter pad.
BENCH MARK STAMPING: 1147 D 2022
DESIGNATION: 872 1147 D
MONUMENTATION: Flange-encased Rod VM#: 24635
AGENCY: FLDEP IDB PID#:
SETTING CLASSIFICATION: OPUS PID#: BBHR92
LATITUDE: 29° 3.9' N ( 29.06569) LONGITUDE: 80° 54.9' W ( -80.91522)
The bench mark is a stainless steel rod located 56.4 m (152.3 ft) SW of the
centerline of North Peninsula Avenue, 4.9 m (16.0 ft) south of the centerline of
Sand Trail Road, 4.1 m (13.6 ft) NE of a wooden light pole number JC5087 and 1.6
m (5.2 ft) NW of a carsonite witness post driven at the base of 8-foot chain
link fence with 3-strand barbed wire. The datum point is the top of a stainless
steel rod driven 24.4 m (80.0 ft) to refusal and encased in a 6-inch PVC with a
FLDEP logo.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 8721147 PUBLICATION DATE: 07/03/2024
Name: PONCE DE LEON INLET SOUTH
FL
NOAA Chart: 11484 Latitude: 29° 3.8' N ( 29.06333)
USGS Quad: NEW SMYRNA BEACH Longitude: 80° 55.0' W ( -80.91583)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1147 E 2022
DESIGNATION: 872 1147 E
MONUMENTATION: Flange-encased Rod VM#: 24636
AGENCY: FLDEP IDB PID#:
SETTING CLASSIFICATION: OPUS PID#: BBHR93
LATITUDE: 29° 4.2' N ( 29.07067) LONGITUDE: 80° 55.0' W ( -80.91625)
The bench mark is a stainless steel rod located 20.9 m (68.6 ft) south of the
west end of a 1.2 m (4.0 ft) wooden fence, 20.2 m (66.2 ft) east of the
centerline of the Sand Trail Road, 10.0 m (32.8 ft) NW of an 2.4 m (8.0 ft)
elevated boardwalk and 0.5 m (1.5 ft) NW of a carsonite witness post. The datum
point is the top of a stainless steel rod driven 24.4m (80 ft), and encased in a
6 inch PVC with a FLDEP logo.
BENCH MARK STAMPING: 1147 F 2022
DESIGNATION: 872 1147 F
MONUMENTATION: Flange-encased Rod VM#: 24638
AGENCY: FLDEP IDB PID#:
SETTING CLASSIFICATION: OPUS PID#: BBHR94
LATITUDE: 29° 4.3' N ( 29.07117) LONGITUDE: 80° 55.1' W ( -80.91817)
The bench mark is a stainless steel rod located 23.5 m (77.0 ft) east of the
beach vegetation line, 7.6 m (25.0 ft) SW of the centerline of the East-West
Trail Road, 5.6 m (18.5 ft) NW of the centerline of the North-South Trail Road
and 0.3 m (1.0 ft) NE of a carsonite witness post. The bench mark is the top of
a stainless steel rod driven 24.0 m (78.6 ft) and encased in a 6 inch PVC with a
FLDEP logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 8721147 PUBLICATION DATE: 07/03/2024
Name: PONCE DE LEON INLET SOUTH
FL
NOAA Chart: 11484 Latitude: 29° 3.8' N ( 29.06333)
USGS Quad: NEW SMYRNA BEACH Longitude: 80° 55.0' W ( -80.91583)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: C 652 2006
DESIGNATION: C 652
MONUMENTATION: Survey disk VM#: 24698
AGENCY: FLDEP IDB PID#:
SETTING CLASSIFICATION: Drain OPUS PID:
LATITUDE: 29° 3.4' N ( 29.05631) LONGITUDE: 80° 54.5' W ( -80.90803)
The bench mark is located 9.8m (32.0 ft) north of the approximate centerline of
Riverview Place, 4.82 m (15.8 ft) east of a Carsonite witness post, 1.1 m (3.5
ft) west of the west edge of the pavement of Peninsula Avenue, and 0.4 m (1.4
ft) east of the NW corner of the drain.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 8721147 PUBLICATION DATE: 07/03/2024
Name: PONCE DE LEON INLET SOUTH
FL
NOAA Chart: 11484 Latitude: 29° 3.8' N ( 29.06333)
USGS Quad: NEW SMYRNA BEACH Longitude: 80° 55.0' W ( -80.91583)
T I D A L D A T U M S
Tidal datums at PONCE DE LEON INLET SOUTH based on:
LENGTH OF SERIES: 11 MONTHS
TIME PERIOD: March 2022 - January 2023
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8721604 TRIDENT PIER, PORT CANAVERAL
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 1.038
MEAN HIGH WATER MHW = 0.950
North American Vertical Datum NAVD88 = 0.701
MEAN SEA LEVEL MSL = 0.499
MEAN TIDE LEVEL MTL = 0.498
MEAN LOW WATER MLW = 0.044
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
PONCE 1.560 0.610
1 1973 1.389 0.439
4 1973 3.365 2.415
1147 B 1996 2.565 1.615
PDI-26 1974 JAX FLA 1.722 0.772
1147 D 2022 2.484 1.534
1147 E 2022 2.684 1.734
1147 F 2022 1.761 0.811
C 652 2006 3.401 2.451
Foot Notes:
Benchmarks 1 1973, 1147 B 1996, 1147 F 2022, and C 652 2006 are based on one
differential leveling connection and do not meet the quality control standards
of the NOS. Therefore, caution should be used when deriving elevations from
these marks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 8721147 PUBLICATION DATE: 07/03/2024
Name: PONCE DE LEON INLET SOUTH
FL
NOAA Chart: 11484 Latitude: 29° 3.8' N ( 29.06333)
USGS Quad: NEW SMYRNA BEACH Longitude: 80° 55.0' W ( -80.91583)
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.