U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8729136 PUBLICATION DATE: 04/21/2003
Name: NEW ENTRANCE CHANNEL, ST. ANDREW BAY
FL
NOAA Chart: 11391 Latitude: 30° 7.5' N ( 30.12500)
USGS Quad: BEACON BEACH Longitude: 85° 43.3' W ( -85.72170)
To reach the tidal bench marks proceed south 5.6 km (3.5 mi) on SR 392 from the
intersection of U.S. 98 to the intersection of a paved road leading SE, then
turn left and proceed along paved road leading SE for approximately 2.9 km (1.8
mi) to the end of the road leading SE and the north shore of St. Andrew Bay,
Channel to Gulf of Mexico, then go northeasterly approximately 91 m (300 ft)
along said shoreline. The bench marks were located in the vicinity and tide
gauge was located approximately 30 m (100 ft) from the said shore.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 9136 A 1991
DESIGNATION: 872 9136 A
MONUMENTATION: Flange-encased Rod VM#: 12492
AGENCY: National Ocean Service (NOS) IDB PID#: AI3215
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: AI3215
LATITUDE: 30° 7.5' N ( 30.12500) LONGITUDE: 85° 43.8' W ( -85.73000)
The primary bench mark is a flange encased rod set at the NE corner of the
parking lot near the covered picnic tables, 13.56 m (44.5 ft) NW of the NW
corner of the northernmost pavilion, 1.68 m (5.5 ft) NE of the outer edge of the
NE corner of the asphalt parking lot, and 0.3 m (1 ft) SW of a Carsonite witness
post. The datum point is the top of a stainless steel rod driven 24.4 m (80 ft)
and encased in a 5-inch PVC pipe with logo cap and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8729136 PUBLICATION DATE: 04/21/2003
Name: NEW ENTRANCE CHANNEL, ST. ANDREW BAY
FL
NOAA Chart: 11391 Latitude: 30° 7.5' N ( 30.12500)
USGS Quad: BEACON BEACH Longitude: 85° 43.3' W ( -85.72170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9136 B 1991
DESIGNATION: 872 9136 B
MONUMENTATION: Tidal Station disk VM#: 12493
AGENCY: National Ocean Service (NOS) IDB PID#: AI3216
SETTING CLASSIFICATION: Concrete slab OPUS PID:
LATITUDE: 30° 7.5' N ( 30.12500) LONGITUDE: 85° 43.8' W ( -85.73000)
The bench mark is a disk set flush in the top of a 11.58 m (38.0 ft) diameter
concrete gun turret foundation, 102.3 m (335.5 ft) SE of the NE corner of the
concession building, 100.58 m (330.0 ft) SE along the boardwalk from the
easternmost concession and restroom building at the picnic area, and about 7.62
m (25.0 ft) NE of the boardwalk.
BENCH MARK STAMPING: 9136 C 1991
DESIGNATION: 872 9136 C
MONUMENTATION: Tidal Station disk VM#: 12494
AGENCY: National Ocean Service (NOS) IDB PID#: AI3218
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 30° 7.5' N ( 30.12500) LONGITUDE: 85° 43.8' W ( -85.73000)
The bench mark is a disk set in the top of a concrete monument in the parking
lot of the Jetties picnic area, 47.55 m (156.0 ft) north of the south outer edge
of the asphalt parking lot, 7.80 m (25.6 ft) south of the north outer edge of
the lot, and 0.91 m (3.0 ft) south of a Carsonite witness post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8729136 PUBLICATION DATE: 04/21/2003
Name: NEW ENTRANCE CHANNEL, ST. ANDREW BAY
FL
NOAA Chart: 11391 Latitude: 30° 7.5' N ( 30.12500)
USGS Quad: BEACON BEACH Longitude: 85° 43.3' W ( -85.72170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9136 D 1991
DESIGNATION: 872 9136 D
MONUMENTATION: Flange-encased Rod VM#: 12495
AGENCY: National Ocean Service (NOS) IDB PID#: AI3219
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: AI3219
LATITUDE: 30° 7.5' N ( 30.12500) LONGITUDE: 85° 43.8' W ( -85.73000)
The bench mark is a flange encased rod set 20.27 m (66.5 ft) east of the
intersection of the jetty picnic area and the main loop road, 14.78 m (48.5 ft)
NE of power pole # 61026-41350, 6.25 m (20.5 ft) NE of the centerline of the
entrance road to the jetty picnic area, and 0.46 m (1.5 ft) north of a Carsonite
witness post. The datum point is the top of a stainless steel rod driven an
unspecified depth, and encased in a 5-inch PVC pipe with logo cap and concrete
kickblock.
BENCH MARK STAMPING: 4691 DA 04
DESIGNATION: 872 9136 DA 04
MONUMENTATION: Tidal Station disk VM#: 12496
AGENCY: National Ocean Service (NOS) IDB PID#: AI3217
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 30° 7.5' N ( 30.12500) LONGITUDE: 85° 43.8' W ( -85.73000)
The bench mark is a disk set in a concrete monument near the NE end of the
parking lot, on top of a sand dune and west of a boardwalk and restroom, 51.66 m
(169.5 ft) SW of the SW edge of the asphalt parking lot, 31.09 m (102.0 ft) west
of the SW corner of a wood sided building, and 0.76 m (2.5 ft) SW of a Carsonite
witness post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8729136 PUBLICATION DATE: 04/21/2003
Name: NEW ENTRANCE CHANNEL, ST. ANDREW BAY
FL
NOAA Chart: 11391 Latitude: 30° 7.5' N ( 30.12500)
USGS Quad: BEACON BEACH Longitude: 85° 43.3' W ( -85.72170)
T I D A L D A T U M S
Tidal datums at NEW ENTRANCE CHANNEL, ST. ANDREW BAY based on:
LENGTH OF SERIES: 1 Month
TIME PERIOD: September 1991 - September 1991
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 = 0.394
MEAN HIGH WATER MHW = 0.387
MEAN TIDE LEVEL MTL = 0.204
MEAN SEA LEVEL MSL = 0.193
MEAN LOW WATER MLW = 0.021
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
9136 A 1991 3.781 3.394
9136 B 1991 5.943 5.556
9136 C 1991 3.529 3.142
9136 D 1991 2.359 1.972
4691 DA 04 7.127 6.740
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8729136 PUBLICATION DATE: 04/21/2003
Name: NEW ENTRANCE CHANNEL, ST. ANDREW BAY
FL
NOAA Chart: 11391 Latitude: 30° 7.5' N ( 30.12500)
USGS Quad: BEACON BEACH Longitude: 85° 43.3' W ( -85.72170)
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.