U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8726819 PUBLICATION DATE: 07/12/2004
Name: OZONA
FL
NOAA Chart: 11412 Latitude: 28° 4.2' N ( 28.07000)
USGS Quad: DUNEDIN Longitude: 82° 46.9' W ( -82.78170)
To reach the tidal bench marks from the Ozona Post Office, proceed north on
Orange Street for one block to Bay Street, then west on Bay Street for two
blocks to its end at Bayshore Drive, proceed south on Bayshore Drive for 91 m
(300 ft) to the Speckled Trout Fish Camp. The bench marks are located in the
vicinity of the Speckled Trout Fish Camp, Bayshore Drive, and Bay Street. The
tide gage and staff were located near the west end, and on the north side of the
wooden pier west of the bait shop.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 1 1975
DESIGNATION: 872 6819 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 7616
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7398
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 28° 4.2' N ( 28.07000) LONGITUDE: 82° 46.9' W ( -82.78170)
The primary bench mark is a disk set flush in the concrete foundation of a boat
davit located at the Speckled Trout Fish Camp boat ramp, 14.33 m (47.0 ft) west
of the centerline of Bayshore Drive, 2.74 m (9.0 ft) NE of the centerline of the
boat ramp, and 0.49 m (1.6 ft) NE of the boat ramp edge.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8726819 PUBLICATION DATE: 07/12/2004
Name: OZONA
FL
NOAA Chart: 11412 Latitude: 28° 4.2' N ( 28.07000)
USGS Quad: DUNEDIN Longitude: 82° 46.9' W ( -82.78170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: M 102 1942
DESIGNATION: M 102
MONUMENTATION: Bench Mark disk VM#: 7615
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AL6281
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 28° 4.2' N ( 28.07000) LONGITUDE: 82° 46.7' W ( -82.77830)
The bench mark is a disk set flush in a concrete monument located one block
north and two blocks west of the Ozona Post Office, 9.63 m (31.6 ft) south of
the centerline of Bay Street, 2.47 m (8.1 ft) NE of the NE corner of the white
frame house at 11 Bay Street, 0.52 m (1.7 ft) SE of powerline pole #12A2359-R,
0.61 m (2 ft) east of a witness post, and 0.1 m (0.2 ft) below ground level.
BENCH MARK STAMPING: NO 2 1975
DESIGNATION: 872 6819 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 7617
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7397
SETTING CLASSIFICATION: Concrete sea wall OPUS PID#: AL7397
LATITUDE: 28° 4.2' N ( 28.07000) LONGITUDE: 82° 46.9' W ( -82.78170)
The bench mark is a disk set flush in the top of the southern of two parallel
east/west sea walls located on the north property line of the Speckled Trout
Fish Camp, 55 m (180 ft) SW of the junction of Bay Street and Bayshore Drive, 21
m (70 ft) west of the centerline of Bayshore Drive, and 1 m (3 ft) east of the
junction of the north/south sea wall with the east/west sea wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8726819 PUBLICATION DATE: 07/12/2004
Name: OZONA
FL
NOAA Chart: 11412 Latitude: 28° 4.2' N ( 28.07000)
USGS Quad: DUNEDIN Longitude: 82° 46.9' W ( -82.78170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 4 1975
DESIGNATION: 872 6819 TIDAL 4
MONUMENTATION: Tidal Station disk VM#: 7618
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7396
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 28° 4.2' N ( 28.07000) LONGITUDE: 82° 46.9' W ( -82.78170)
The bench mark is a disk located NW of the bend between Bay Street and Bayshore
Drive, 62 m (204 ft) NE of Bench Mark NO 2 1975, 10 m (33 ft) east of a wood
bulkhead, 6.71 m (22.0 ft) north of the centerline of Bay Street, and 0.61 m
(2.0 ft) west of power pole #2-25700 with a witness sign. The bench mark is set
at ground level, crimped to the top of a copper-clad steel rod driven an
unspecified depth to refusal, and encased in a PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 6819 F 1983
DESIGNATION: 872 6819 F TIDAL
MONUMENTATION: Tidal Station disk VM#: 7619
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7399
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 28° 4.2' N ( 28.07000) LONGITUDE: 82° 46.9' W ( -82.78170)
The bench mark is a disk set flush in the top of a concrete monument located
along Bayshore Drive, 0.2 km (0.1 mi) south of Bay Street, 15 m (50 ft) north of
the centerline of the driveway for the house at 300 Bayshore Drive, 14.51 m
(47.6 ft) south of the centerline of Banana Road, 4.42 m (14.5 ft) east of the
centerline of Bayshore Drive, and 1.19 m (3.9 ft) west of power pole 2A2201F
with a witness sign.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8726819 PUBLICATION DATE: 07/12/2004
Name: OZONA
FL
NOAA Chart: 11412 Latitude: 28° 4.2' N ( 28.07000)
USGS Quad: DUNEDIN Longitude: 82° 46.9' W ( -82.78170)
T I D A L D A T U M S
Tidal datums at OZONA based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: November 1975 - November 1975
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8726724 CLEARWATER BEACH, GULF OF MEXICO
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.922
MEAN HIGH WATER MHW = 0.818
North American Vertical Datum NAVD88 = 0.586
MEAN SEA LEVEL MSL = 0.497
MEAN TIDE LEVEL MTL = 0.491
MEAN LOW WATER MLW = 0.164
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 1 1975 1.393 0.575
M 102 1942 2.632 1.814
NO 2 1975 1.811 0.993
NO 4 1975 2.783 1.965
6819 F 1983 2.201 1.383
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8726819 PUBLICATION DATE: 07/12/2004
Name: OZONA
FL
NOAA Chart: 11412 Latitude: 28° 4.2' N ( 28.07000)
USGS Quad: DUNEDIN Longitude: 82° 46.9' W ( -82.78170)
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.