U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8725791 PUBLICATION DATE: 11/13/2003
Name: HARBOR HEIGHTS, PEACE R.
FL
NOAA Chart: 11426 Latitude: 26° 59.3' N ( 26.98830)
USGS Quad: CLEVELAND Longitude: 81° 59.6' W ( -81.99330)
To reach the tidal bench marks, on the west side of the Peace River at the
southern end of Whidden Bay, proceed to the county park in Harbour Heights. The
bench marks are in the park area and the gage site was at the most southern
pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: BM 1
DESIGNATION: 872 5791 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 6074
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AD1495
SETTING CLASSIFICATION: Concrete sidewalk OPUS PID:
LATITUDE: 26° 59.3' N ( 26.98830) LONGITUDE: 81° 59.6' W ( -81.99330)
The primary bench mark is a disk set into the concrete in the county park at
Harbour Heights, in the sidewalk leading to the NE entrance to the main
building, 30.18 m (99.0 ft) west of the flagpole, 19.20 m (63.0 ft) south of the
south fence around the swimming pool and 4.11 m (13.5 ft) SE of the NE corner of
the building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8725791 PUBLICATION DATE: 11/13/2003
Name: HARBOR HEIGHTS, PEACE R.
FL
NOAA Chart: 11426 Latitude: 26° 59.3' N ( 26.98830)
USGS Quad: CLEVELAND Longitude: 81° 59.6' W ( -81.99330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5791 A 1977
DESIGNATION: 872 5791 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 6072
AGENCY: National Ocean Survey (NOS) IDB PID#: AD7854
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 26° 59.3' N ( 26.98830) LONGITUDE: 81° 59.7' W ( -81.99500)
The bench mark is a disk set in concrete in the county park at Harbour Heights,
16.15 m (53.0 ft) NNE of the NNE corner of the fence around the swimming pool, 2
m (6.1 ft) west of the SW corner of the shore end of the most southern pier in
the seawall and 0.21 m (0.7 ft) NNW of the south end of the seawall.
BENCH MARK STAMPING: 5791 B 1977
DESIGNATION: 872 5791 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 6073
AGENCY: National Ocean Survey (NOS) IDB PID#: AD7853
SETTING CLASSIFICATION: Concrete flagpole base OPUS PID:
LATITUDE: 26° 59.3' N ( 26.98830) LONGITUDE: 81° 59.7' W ( -81.99500)
The bench mark is a disk set into concrete in the county park at Harbour
Heights, in a flagpole base, 29.99 m (98.4 ft) west of Bench Mark BM 1, 19.60 m
(64.3 ft) SSW of the SW corner of the fence around the swimming pool and 0.24 m
(0.8 ft) WNW of the flagpole.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8725791 PUBLICATION DATE: 11/13/2003
Name: HARBOR HEIGHTS, PEACE R.
FL
NOAA Chart: 11426 Latitude: 26° 59.3' N ( 26.98830)
USGS Quad: CLEVELAND Longitude: 81° 59.6' W ( -81.99330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: BM 2
DESIGNATION: 872 5791 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 6075
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AD1496
SETTING CLASSIFICATION: Concrete sidewalk OPUS PID#: AD1496
LATITUDE: 26° 59.3' N ( 26.98830) LONGITUDE: 81° 59.7' W ( -81.99500)
The bench mark is a disk set into the concrete in the county park at Harbour
Heights, 31.39 m (103.0 ft) west of the SW corner of the bath house, 23.93 m
(78.5 ft) SSE of the SE corner of a shuffleboard court, 22.40 m (73.5 ft) NW of
the NW corner of the main building and 0.15 m (0.5 ft) west of the NW corner of
a concrete block used as a motor mount which is at the center of a 1.83 m (6.0
ft) square slab.
BENCH MARK STAMPING: BM 3
DESIGNATION: 872 5791 TIDAL 3
MONUMENTATION: Tidal Station disk VM#: 6076
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AD1494
SETTING CLASSIFICATION: Concrete sidewalk OPUS PID:
LATITUDE: 26° 59.3' N ( 26.98830) LONGITUDE: 81° 59.6' W ( -81.99330)
The bench mark is a disk set into the concrete in the county park at Harbour
Heights, in the NE corner of the concrete area around the swimming pool NE of
the main building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8725791 PUBLICATION DATE: 11/13/2003
Name: HARBOR HEIGHTS, PEACE R.
FL
NOAA Chart: 11426 Latitude: 26° 59.3' N ( 26.98830)
USGS Quad: CLEVELAND Longitude: 81° 59.6' W ( -81.99330)
T I D A L D A T U M S
Tidal datums at HARBOR HEIGHTS, PEACE R. based on:
LENGTH OF SERIES: 4 MONTHS
TIME PERIOD: December 1977 - March 1978
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8725110 NAPLES, GULF OF MEXICO
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.615
MEAN HIGH WATER MHW = 0.537
North American Vertical Datum NAVD88 = 0.465
MEAN SEA LEVEL MSL = 0.336
MEAN TIDE LEVEL MTL = 0.336
MEAN LOW WATER MLW = 0.135
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
BM 1 2.145 1.608
5791 A 1977 0.969 0.432
5791 B 1977 2.055 1.518
BM 2 2.008 1.471
BM 3 2.094 1.557
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8725791 PUBLICATION DATE: 11/13/2003
Name: HARBOR HEIGHTS, PEACE R.
FL
NOAA Chart: 11426 Latitude: 26° 59.3' N ( 26.98830)
USGS Quad: CLEVELAND Longitude: 81° 59.6' W ( -81.99330)
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.