U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
Station ID: 8729141 PUBLICATION DATE: 11/13/2003
Name: ST ANDREW STATE PARK GR LAGOON
FL
NOAA Chart: 11391 Latitude: 30° 8.0' N ( 30.13330)
USGS Quad: PANAMA CITY Longitude: 85° 43.9' W ( -85.73170)
To reach the tidal bench marks from the west end of the U.S. Highway 98 bridge
(Hathaway Bridge) over St. Andrews Bay, proceed west on U.S. Highway 98 for 1.0
km (0.6 mi) to Thomas Drive, then south on Thomas Drive for 5.8 km (3.6 mi) to a
road fork, bear left and go 0.6 km (0.4 mi) to the entrance to St. Andrews State
Park, then SE on the park road for 1.3 km (0.8 mi) to the picnic and boat
launching area. The bench marks are around the picnic area and along the park
road. The tide gage and staff were located on the fishing pier at the boat
launch.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 9141 A 1976
DESIGNATION: 872 9141 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 10016
AGENCY: National Ocean Survey (NOS) IDB PID#: BE2988
SETTING CLASSIFICATION: Concrete sidewalk OPUS PID:
LATITUDE: 30° 7.9' N ( 30.13170) LONGITUDE: 85° 43.8' W ( -85.73000)
The primary bench mark is a disk set in the concrete sidewalk around the
bathhouse at the picnic area, 28.77 m (94.4 ft) NE of the beginning of the
sidewalk leading to the bathhouse, 4.48 m (14.7 ft) NW of the NW corner of the
bathhouse, and 0.70 m (2.3 ft) north of the NW support piling for the bathhouse
roof.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
Station ID: 8729141 PUBLICATION DATE: 11/13/2003
Name: ST ANDREW STATE PARK GR LAGOON
FL
NOAA Chart: 11391 Latitude: 30° 8.0' N ( 30.13330)
USGS Quad: PANAMA CITY Longitude: 85° 43.9' W ( -85.73170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9141 B 1976
DESIGNATION: 872 9141 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 10017
AGENCY: National Ocean Survey (NOS) IDB PID#: BE1529
SETTING CLASSIFICATION: Concrete culvert head wall OPUS PID:
LATITUDE: 30° 7.8' N ( 30.13000) LONGITUDE: 85° 44.0' W ( -85.73330)
The bench mark is a disk set in top of the north end of a concrete culvert
headwall, 161 m (528 ft) south of the intersection of the east-west paved road
leading from the entrance gate and the paved road leading to the beach, 6.37 m
(20.9 ft) east of the centerline of the road leading to the beach, and 215 m
(705 ft) south of bench mark 9141 C 1975.
BENCH MARK STAMPING: 9141 C 1976
DESIGNATION: 872 9141 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 10018
AGENCY: National Ocean Survey (NOS) IDB PID#: BE2987
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 30° 7.9' N ( 30.13170) LONGITUDE: 85° 44.0' W ( -85.73330)
The bench mark is a disk located 215 m (705 ft) north of bench mark 9141 B 1976,
158 m (520 ft) WSW of bench ,ark 9141 A 1976, 9.24 m (30.3 ft) NNE of the
centerline of the dirt road leading west to the maintenance yard, 8.41 m (27.6
ft) west of the centerline of the paved road leading to the boat launch, 2 m (6
ft) WNW of powerline pole #R-60 with a witness sign, and 0.40 m (1.3 ft) east of
a witness post. The bench mark is set 15 cm (0.5 ft) below ground level,
crimped to the top of a copper-clad steel rod driven to refusal, and encased in
a PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
Station ID: 8729141 PUBLICATION DATE: 11/13/2003
Name: ST ANDREW STATE PARK GR LAGOON
FL
NOAA Chart: 11391 Latitude: 30° 8.0' N ( 30.13330)
USGS Quad: PANAMA CITY Longitude: 85° 43.9' W ( -85.73170)
T I D A L D A T U M S
Tidal datums at ST ANDREW STATE PARK GR LAGOON based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: October 1976 - December 1976
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8729108 PANAMA CITY, ST. ANDREW BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.418
MEAN HIGH WATER MHW = 0.393
MEAN TIDE LEVEL MTL = 0.210
MEAN SEA LEVEL MSL = 0.206
North American Vertical Datum NAVD88 = 0.182
MEAN LOW WATER MLW = 0.028
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
9141 A 1976 1.888 1.495
9141 B 1976 2.110 1.717
9141 C 1976 2.629 2.236
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
Station ID: 8729141 PUBLICATION DATE: 11/13/2003
Name: ST ANDREW STATE PARK GR LAGOON
FL
NOAA Chart: 11391 Latitude: 30° 8.0' N ( 30.13330)
USGS Quad: PANAMA CITY Longitude: 85° 43.9' W ( -85.73170)
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.