U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 8726809 PUBLICATION DATE: 05/12/2004
Name: HONNEYMOON ISLAND, INSIDE
FL
NOAA Chart: 11412 Latitude: 28° 3.7' N ( 28.06170)
USGS Quad: DUNEDIN Longitude: 82° 48.8' W ( -82.81330)
To reach the tidal bench marks from the intersection of U.S. Alt. Route 19 and
State Road S-586 (Causeway Boulevard), proceed west then NW on Causeway
Boulevard for 3.5 km (2.2 mi) to the Royal Stewart Arms Condominiums, then turn
right and proceed for 0.2 km (0.1 mi) NE to the fishing pier. The bench marks
are located along Causeway Boulevard and in the vicinity of the Royal Stewart
Arms Condominiums. The tide gage and staff were located on the west side of the
fishing pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 1 1975
DESIGNATION: 872 6809 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 7608
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7409
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 28° 3.6' N ( 28.06000) LONGITUDE: 82° 48.8' W ( -82.81330)
The primary bench mark is a disk set flush in the north end of the north/south
concrete bulkhead located east of the Royal Stewart Arms Condominiums, 19 m (63
ft) SE of the south end of the Royal Steward Arms Fishing Pier, 6.55 m (21.5 ft)
NE of the NE corner of the Royal Steward Arms recreation room, and 3.47 m (11.4
ft) east of the 0.24 m (0.8 ft) diameter palm tree closest to the recreation
room.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8726809 PUBLICATION DATE: 05/12/2004
Name: HONNEYMOON ISLAND, INSIDE
FL
NOAA Chart: 11412 Latitude: 28° 3.7' N ( 28.06170)
USGS Quad: DUNEDIN Longitude: 82° 48.8' W ( -82.81330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 2 1975
DESIGNATION: 872 6809 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 7609
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7408
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 28° 3.6' N ( 28.06000) LONGITUDE: 82° 48.8' W ( -82.81330)
The bench mark is a disk set flush in a concrete bulkhead for the westernmost
causeway bridge, 122 m (400 ft) south of bench mark NO 1 1975, 1 m (2 ft) west
of the east edge of the concrete bulkhead, and 0.55 m (1.8 ft) east of power
pole #2-10936.
BENCH MARK STAMPING: NO 3 1975
DESIGNATION: 872 6809 TIDAL 3
MONUMENTATION: Tidal Station disk VM#: 7610
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7407
SETTING CLASSIFICATION: Concrete sidewalk OPUS PID:
LATITUDE: 28° 3.6' N ( 28.06000) LONGITUDE: 82° 48.8' W ( -82.81330)
The bench mark is a disk set flush in the concrete sidewalk located at the west
end of the westernmost causeway bridge, 15 m (49 ft) south of bench mark NO 2
1975, 5.18 m (17.0 ft) north of the centerline of Causeway Boulevard, and 3.20 m
(10.5 ft) east of the west end of the guardrail.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8726809 PUBLICATION DATE: 05/12/2004
Name: HONNEYMOON ISLAND, INSIDE
FL
NOAA Chart: 11412 Latitude: 28° 3.7' N ( 28.06170)
USGS Quad: DUNEDIN Longitude: 82° 48.8' W ( -82.81330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 4 1975
DESIGNATION: 872 6809 TIDAL 4
MONUMENTATION: Tidal Station disk VM#: 7611
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7406
SETTING CLASSIFICATION: Concrete sidewalk OPUS PID:
LATITUDE: 28° 3.6' N ( 28.06000) LONGITUDE: 82° 48.8' W ( -82.81330)
The bench mark is a disk set flush in the concrete sidewalk located at the east
end of the westernmost causeway bridge, 137 m (450 ft) east of bench mark NO 3
1975, 5.43 m (17.8 ft) north of the centerline of Causeway Boulevard, and 3.26 m
(10.7 ft) west of the east end of the guardrail.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8726809 PUBLICATION DATE: 05/12/2004
Name: HONNEYMOON ISLAND, INSIDE
FL
NOAA Chart: 11412 Latitude: 28° 3.7' N ( 28.06170)
USGS Quad: DUNEDIN Longitude: 82° 48.8' W ( -82.81330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 5 1975
DESIGNATION: 872 6809 TIDAL 5
ALIAS: NO 1A 1975
MONUMENTATION: Tidal Station disk VM#: 7612
AGENCY: National Ocean Survey (NOS) IDB PID#: AL7405
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 28° 3.6' N ( 28.06000) LONGITUDE: 82° 48.8' W ( -82.81330)
The bench mark is a disk set flush in the SE concrete bulkhead of the
westernmost causeway bridge, 30 m (100 ft) south of the centerline of Causeway
Boulevard, 23 m (75 ft) east of the the first bend along the concrete bulkhead
from Causeway Boulevard, and 1.98 m (6.5 ft) south of the north end of the
bulkhead.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8726809 PUBLICATION DATE: 05/12/2004
Name: HONNEYMOON ISLAND, INSIDE
FL
NOAA Chart: 11412 Latitude: 28° 3.7' N ( 28.06170)
USGS Quad: DUNEDIN Longitude: 82° 48.8' W ( -82.81330)
T I D A L D A T U M S
Tidal datums at HONNEYMOON ISLAND, INSIDE based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: June 1975 - August 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 = 0.898
MEAN HIGH WATER MHW = 0.791
North American Vertical Datum NAVD88 = 0.546
MEAN SEA LEVEL MSL = 0.489
MEAN TIDE LEVEL MTL = 0.477
MEAN LOW WATER MLW = 0.163
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 1.762 0.971
NO 2 1975 1.720 0.929
NO 3 1975 5.565 4.774
NO 4 1975 5.676 4.885
NO 5 1975 1.469 0.678
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 8726809 PUBLICATION DATE: 05/12/2004
Name: HONNEYMOON ISLAND, INSIDE
FL
NOAA Chart: 11412 Latitude: 28° 3.7' N ( 28.06170)
USGS Quad: DUNEDIN Longitude: 82° 48.8' W ( -82.81330)
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.