U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 10
Station ID: 8720582 PUBLICATION DATE: 08/25/2011
Name: STATE ROAD 312, MATANZAS RIVER
FL
NOAA Chart: 11486 Latitude: 29° 52.0' N ( 29.86670)
USGS Quad: ST AUGUSTINE BEACH Longitude: 81° 18.4' W ( -81.30670)
To reach the Aqua Trak from the intersection of U.S. Highway 1 (Ponce De Leon
Boulevard) and State Road 312 on the south side of Saint Augustine, go east on
State Road 312 for 1.93 km (1.2 mi) passing over the Intercoastal Waterway
(Matanzas River) to the east end of the bridge, continue east on State Road 312
for 0.16 km (0.1 mi) to a dim track road on the right parallel to State Road
312, turn right on the dim track road and go south then west for 0.16 km (0.1
mi) to the end of truck travel, now by boat continue west under the bridge for
about 0.24 km (0.15 mi) to the Aqua Trak (tide gage) attached to the bridge
fender.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 0582 C 1998
DESIGNATION: 872 0582 C TIDAL
MONUMENTATION: Bench Mark disk VM#: 17782
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete bridge footing OPUS PID:
LATITUDE: 29° 52.0' N ( 29.86667) LONGITUDE: 81° 18.3' W ( -81.30500)
The primary bench mark is a disk set flush in the top of the SW corner of the
concrete footing of the bridge column pier, 121.92 m (400.0 ft) west of tidal
mark 0582 D 1998, 3.47 m (11.4 ft) west of the east side column pier, 1.46 m
(4.8 ft) SW of the bridge column, 0.67 m (2.2 ft) north of the south side of the
column and 0.64 m (2.1 ft) east of the west side of the column.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 10
Station ID: 8720582 PUBLICATION DATE: 08/25/2011
Name: STATE ROAD 312, MATANZAS RIVER
FL
NOAA Chart: 11486 Latitude: 29° 52.0' N ( 29.86670)
USGS Quad: ST AUGUSTINE BEACH Longitude: 81° 18.4' W ( -81.30670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0582 A 1998
DESIGNATION: 872 0582 A TIDAL
MONUMENTATION: Bench Mark disk VM#: 17780
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete bridge footing OPUS PID:
LATITUDE: 29° 52.0' N ( 29.86667) LONGITUDE: 81° 18.4' W ( -81.30611)
The bench mark is a disk set flush in the top of the SW corner of the concrete
footing of the bridge column pier, located 60.96 m (200.0 ft) west of tidal mark
0582 B 1998, 3.05 m (10.0 ft) west of the east side column pier, 0.82 m (2.7 ft)
east of the west side of the column and 0.58 m (1.9 ft) north of the south side
of the column pier.
BENCH MARK STAMPING: 0582 B 1998
DESIGNATION: 872 0582 B TIDAL
MONUMENTATION: Bench Mark disk VM#: 17781
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete bridge footing OPUS PID:
LATITUDE: 29° 52.0' N ( 29.86667) LONGITUDE: 81° 18.3' W ( -81.30556)
The bench mark is a disk set flush in the top of the SW corner of the concrete
footing of the bridge column pier, 60.96 m (200.0 ft) west of tidal mark 0582 C
1998, 3.51 m (11.5 ft) west of the east side column pier, 1.49 m (4.9 ft) SW of
the bridge column, 0.64 m (2.1 ft) east of the west side of the column and 0.58
m (1.9 ft) north of the south side of the column pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 10
Station ID: 8720582 PUBLICATION DATE: 08/25/2011
Name: STATE ROAD 312, MATANZAS RIVER
FL
NOAA Chart: 11486 Latitude: 29° 52.0' N ( 29.86670)
USGS Quad: ST AUGUSTINE BEACH Longitude: 81° 18.4' W ( -81.30670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0582 D 1998
DESIGNATION: 872 0582 D TIDAL
MONUMENTATION: Flange-encased Rod VM#: 17783
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 29° 52.0' N ( 29.86667) LONGITUDE: 81° 18.2' W ( -81.30389)
The bench mark is a flange-encased rod located 100.58 m (330.0 ft) west of tidal
mark 0582 E 1998, 3.26 m (10.7 ft) south of the north edge of the column pier,
0.30 m (1.0 ft) north of the south column pier and 0.18 m (0.6 ft) east of a
carsonite witness post. The datum point is recessed 0.09 m (0.3 ft) below the
level of the NGS logo cap, being the top of a stainless steel rod driven 6.71 m
(22.0 ft) to refusal, and encased in a 5-inch NGS logo cap.
BENCH MARK STAMPING: 0582 E 1998
DESIGNATION: 872 0582 E TIDAL
MONUMENTATION: Bench Mark disk VM#: 17784
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 29° 52.0' N ( 29.86667) LONGITUDE: 81° 18.2' W ( -81.30278)
The bench mark is a disk set in the top of a round concrete monument flush with
the ground and level with the dim track road, 20.73 m (68.0 ft) NW of tidal mark
0582 F 1998, 15.64 m (51.3 ft) east of the bridge column, 6.10 m (20.0 ft) east
of the approximate centerline of the dim track road, 0.61 m (2.0 ft) south of
the south side of the overpass and 0.43 m (1.4 ft) south of a concrete filled
12-inch PVC pipe with a witness sign attached.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 10
Station ID: 8720582 PUBLICATION DATE: 08/25/2011
Name: STATE ROAD 312, MATANZAS RIVER
FL
NOAA Chart: 11486 Latitude: 29° 52.0' N ( 29.86670)
USGS Quad: ST AUGUSTINE BEACH Longitude: 81° 18.4' W ( -81.30670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0582 F 1998
DESIGNATION: 872 0582 F TIDAL
MONUMENTATION: Bench Mark disk VM#: 17785
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 29° 52.0' N ( 29.86667) LONGITUDE: 81° 18.1' W ( -81.30250)
The bench mark is a disk set in the top of a concrete monument flush with the
ground and level with the dim track road, 79.25 m (260.0 ft) SW of bench mark
0582 G 1998, 20.73 m (68.0 ft) SE of bench mark 0582 E 1998, 21.64 m (71.0 ft)
south of the approximate centerline of State Road 312 overpass, 4.27 m (14.0 ft)
north of the approximate centerline of the dim track road and 0.61 m (2.0 ft)
south of power pole Number 36052743104 and carsonite witness post.
BENCH MARK STAMPING: 0582 G 1998
DESIGNATION: 872 0582 G
MONUMENTATION: Bench Mark disk VM#: 17786
AGENCY: Florida Dept. of Env. Protection (FLDEP)IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID#: DL9129
LATITUDE: 29° 52.0' N ( 29.86670) LONGITUDE: 81° 18.4' W ( -81.30670)
The bench mark is set in the top of a round concrete monument located 79.2 m
(260.0 ft) northeast of tidal mark 0582 F 1998, 8.9 m (29.2 ft) south of the
centerline of state road 312, 1.5 m (5.0 ft) west of the west end of a metal
guardrail, 0.27 m (0.9 ft) south of a metal guardrail, and 0.18 m (0.6 ft) south
of a carsonite witness post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 10
Station ID: 8720582 PUBLICATION DATE: 08/25/2011
Name: STATE ROAD 312, MATANZAS RIVER
FL
NOAA Chart: 11486 Latitude: 29° 52.0' N ( 29.86670)
USGS Quad: ST AUGUSTINE BEACH Longitude: 81° 18.4' W ( -81.30670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: T 475 1998
DESIGNATION: T 475
MONUMENTATION: Bench Mark disk VM#: 17787
AGENCY: FL Department of Environmental
Protection (FLDEP) IDB PID#:
SETTING CLASSIFICATION: Concrete headwall OPUS PID:
LATITUDE: 29° 51.6' N ( 29.86083) LONGITUDE: 81° 17.0' W ( -81.28361)
The bench mark is a disk set flush in the top of a concrete headwall level with
the ground and level with State Road 312, 36.12 m (118.5 ft) NW of the NW corner
of a building (American Home Patient, Thrift Shoppe), 32.00 m (105.0 ft) east of
a steel pole Number 36151968607 that is supporting a large overhead sign
(Anastasia Blvd next signal), 14.05 m (46.1 ft) south of the approximate
centerline of State Road 312, 5.79 m (19.0 ft) SW of an aluminum light pole
Number 361519986, 2.04 m (6.7 ft) west of the east end of the headwall and 1.77
m (5.8 ft) east of the west end of the headwall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 10
Station ID: 8720582 PUBLICATION DATE: 08/25/2011
Name: STATE ROAD 312, MATANZAS RIVER
FL
NOAA Chart: 11486 Latitude: 29° 52.0' N ( 29.86670)
USGS Quad: ST AUGUSTINE BEACH Longitude: 81° 18.4' W ( -81.30670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: H 322 1970
DESIGNATION: H 322
MONUMENTATION: Tidal Station disk VM#: 17788
AGENCY: United States Navy (USN) IDB PID#: AQ0345
SETTING CLASSIFICATION: Concrete post OPUS PID:
LATITUDE: 29° 51.5' N ( 29.85889) LONGITUDE: 81° 16.0' W ( -81.26750)
The bench mark is a disk set in the top of a prefabricated 0.24 m x 0.24 m (0.8
ft x 0.8 ft) concrete post, located 15.00 m (49.2 ft) south of the approximate
centerline of Pope Road, 14.90 m (48.9 ft) west of the approximate centerline of
State Road A1A (Beach Boulevard), 2.01 m (6.6 ft) south of a power pole with 1
guy wire attached and 0.18 m (0.6 ft) east of a carsonite witness post, and
projecting (0.3 ft) above the level of the ground and 0.30 m (1.0 ft) below the
level of State Road A1A (Beach Boulevard). The number 1939 is precast in the
disk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 10
Station ID: 8720582 PUBLICATION DATE: 08/25/2011
Name: STATE ROAD 312, MATANZAS RIVER
FL
NOAA Chart: 11486 Latitude: 29° 52.0' N ( 29.86670)
USGS Quad: ST AUGUSTINE BEACH Longitude: 81° 18.4' W ( -81.30670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: L 405 1991
DESIGNATION: L 405
MONUMENTATION: Flange-encased Rod VM#: 17789
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#: AQ2722
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 29° 52.0' N ( 29.86670) LONGITUDE: 81° 18.4' W ( -81.30670)
The bench mark is a stainless steel rod located 13.59 m (44.6 ft) west of the
centerline of A1A, Beach BLVD , 4.51 m (14.8 ft) south of the centerline of D
Street and 0.49 m (1.6 ft) east of a power pole.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 10
Station ID: 8720582 PUBLICATION DATE: 08/25/2011
Name: STATE ROAD 312, MATANZAS RIVER
FL
NOAA Chart: 11486 Latitude: 29° 52.0' N ( 29.86670)
USGS Quad: ST AUGUSTINE BEACH Longitude: 81° 18.4' W ( -81.30670)
T I D A L D A T U M S
Tidal datums at STATE ROAD 312, MATANZAS RIVER based on:
LENGTH OF SERIES: 1 YEAR
TIME PERIOD: October 2003 - September 2004
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 (09/27/2004) = 2.246
MEAN HIGHER HIGH WATER MHHW = 1.464
MEAN HIGH WATER MHW = 1.363
North American Vertical Datum NAVD88 = 0.857
MEAN SEA LEVEL MSL = 0.726
MEAN TIDE LEVEL MTL = 0.711
MEAN LOW WATER MLW = 0.058
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (03/07/2004) = -0.442
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
0582 C 1998 1.579 0.216
0582 A 1998 1.605 0.242
0582 B 1998 1.590 0.227
0582 D 1998 1.167 -0.196
0582 E 1998 2.277 0.914
0582 F 1998 2.543 1.180
0582 G 1998 4.731 3.368
T 475 1998 3.038 1.675
H 322 1970 2.617 1.254
L 405 1991 3.222 1.859
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 10
Station ID: 8720582 PUBLICATION DATE: 08/25/2011
Name: STATE ROAD 312, MATANZAS RIVER
FL
NOAA Chart: 11486 Latitude: 29° 52.0' N ( 29.86670)
USGS Quad: ST AUGUSTINE BEACH Longitude: 81° 18.4' W ( -81.30670)
Foot Notes:
Geodetic heights of the bench marks meet all NOAA/NOS/NGS quality control
standards for Second Order, Class 1 leveling. It is advised that a confirmation
set of levels be established for bench marks 0582 D 1998, 0582 E 1998, 0582 F
1998, 0582 G 1998, H 322 1970, L 405 1991, and T 475 1998 to verify height
differences before using tidal bench mark elevation information.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 10 of 10
Station ID: 8720582 PUBLICATION DATE: 08/25/2011
Name: STATE ROAD 312, MATANZAS RIVER
FL
NOAA Chart: 11486 Latitude: 29° 52.0' N ( 29.86670)
USGS Quad: ST AUGUSTINE BEACH Longitude: 81° 18.4' W ( -81.30670)
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.