U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 8725222 PUBLICATION DATE: 01/06/2004
Name: WATER TURKEY BAY
FL
NOAA Chart: 11426 Latitude: 26° 16.6' N ( 26.27670)
USGS Quad: BONITA SPRINGS Longitude: 81° 49.5' W ( -81.82500)
To reach the tidal bench marks from the intersection of U.S. Highway 41 and
County Road C-846 in North Naples, proceed 2.7 km (1.7 mi) west on C-846 to the
Vanderbilt Surf Colony, and 0.56 km (0.35 mi) north to the NE section of the
seawall and the gage site. The bench marks are on the seawall and bridge. The
gage and staff were on the bay north of the bench marks.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: SRD ELEV 2604
DESIGNATION: 2604
MONUMENTATION: Survey disk VM#: 7844
AGENCY: Florida State Road Department (FLSRD) IDB PID#: AD6308
SETTING CLASSIFICATION: Concrete bridge railing OPUS PID:
LATITUDE: 26° 16.4' N ( 26.27330) LONGITUDE: 81° 49.4' W ( -81.82330)
The primary bench mark is a disk set flush in the concrete railing at the SW
corner of the C-846 bridge over Water Turkey Bay, 6.16 m (20.2 ft) south of the
centerline of the highway, and 1.04 m (3.4 ft) above road level.
BENCH MARK STAMPING: SRD ELEV 2764
DESIGNATION: 2764
MONUMENTATION: Survey disk VM#: 7845
AGENCY: Florida State Road Department (FLSRD) IDB PID#: AD6307
SETTING CLASSIFICATION: Concrete bridge railing OPUS PID:
LATITUDE: 26° 16.4' N ( 26.27330) LONGITUDE: 81° 49.4' W ( -81.82330)
The bench mark is a disk set flush in the top of the concrete railing at the NE
corner of the C-846 bridge over Water Turkey Bay, 5.97 m (19.6 ft) north of the
centerline of the highway, and 1.04 m (3.4 ft) above road level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8725222 PUBLICATION DATE: 01/06/2004
Name: WATER TURKEY BAY
FL
NOAA Chart: 11426 Latitude: 26° 16.6' N ( 26.27670)
USGS Quad: BONITA SPRINGS Longitude: 81° 49.5' W ( -81.82500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5222 A 1978
DESIGNATION: 872 5222 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 7846
AGENCY: National Ocean Survey (NOS) IDB PID#: AD6309
SETTING CLASSIFICATION: Concrete sea wall cap OPUS PID:
LATITUDE: 26° 16.6' N ( 26.27670) LONGITUDE: 81° 49.4' W ( -81.82330)
The bench mark is a disk set in the top of the 0.43 m (1.4 ft) wide concrete
seawall cap, 22.56 m (74.0 ft) south of the first curve in the NE section of the
seawall, 12 m (39 ft) east of the top of an earth ridge, and 10.64 m (34.9 ft)
SSE of a large pine tree.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8725222 PUBLICATION DATE: 01/06/2004
Name: WATER TURKEY BAY
FL
NOAA Chart: 11426 Latitude: 26° 16.6' N ( 26.27670)
USGS Quad: BONITA SPRINGS Longitude: 81° 49.5' W ( -81.82500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: WP-9 1978 JAX FLA
DESIGNATION: WP 9
MONUMENTATION: Survey disk VM#: 7847
AGENCY: US Army Corps of Engineers (USE) IDB PID#: AD6306
SETTING CLASSIFICATION: Concrete road shoulder OPUS PID:
LATITUDE: 26° 16.4' N ( 26.27330) LONGITUDE: 81° 49.4' W ( -81.82330)
The bench mark is a disk set flush in the concrete road shoulder at the NE
corner of the C-846 bridge over Water Turkey Bay, 5.12 m (16.8 ft) north of the
centerline of the highway, 2.83 m (9.3 ft) west of bench mark SRD ELEV 2764, and
2.16 m (7.1 ft) west of the east end of the bridge.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8725222 PUBLICATION DATE: 01/06/2004
Name: WATER TURKEY BAY
FL
NOAA Chart: 11426 Latitude: 26° 16.6' N ( 26.27670)
USGS Quad: BONITA SPRINGS Longitude: 81° 49.5' W ( -81.82500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: WP-10 1978 JAX FLA
DESIGNATION: WP 10
MONUMENTATION: Survey disk VM#: 7848
AGENCY: US Army Corps of Engineers (USE) IDB PID#: AD6310
SETTING CLASSIFICATION: Concrete sea wall cap OPUS PID:
LATITUDE: 26° 16.6' N ( 26.27670) LONGITUDE: 81° 49.4' W ( -81.82330)
The bench mark is a disk set flush in a concrete sea wall cap, 0.5 km (0.3 mi)
north of the C-846 bridge over Water Turkey Bay, 20.18 m (66.2 ft) north of
bench mark 5222 A 1978, and 10 m (33 ft) NE of a 0.52 m (1.7 ft) diameter pine
tree with a triangular blaze.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8725222 PUBLICATION DATE: 01/06/2004
Name: WATER TURKEY BAY
FL
NOAA Chart: 11426 Latitude: 26° 16.6' N ( 26.27670)
USGS Quad: BONITA SPRINGS Longitude: 81° 49.5' W ( -81.82500)
T I D A L D A T U M S
Tidal datums at WATER TURKEY BAY based on:
LENGTH OF SERIES: 5 MONTHS
TIME PERIOD: April 1978 - August 1978
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8725235 WIGGINS PASS, INSIDE
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.680
MEAN HIGH WATER MHW = 0.611
North American Vertical Datum NAVD88 = 0.527
MEAN TIDE LEVEL MTL = 0.368
MEAN SEA LEVEL MSL = 0.366
MEAN LOW WATER MLW = 0.126
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
SRD ELEV 2604 8.284 7.673
SRD ELEV 2764 8.529 7.918
5222 A 1978 1.305 0.694
WP-9 1978 JAX FLA 7.625 7.014
WP-10 1978 JAX FLA 1.313 0.702
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 8725222 PUBLICATION DATE: 01/06/2004
Name: WATER TURKEY BAY
FL
NOAA Chart: 11426 Latitude: 26° 16.6' N ( 26.27670)
USGS Quad: BONITA SPRINGS Longitude: 81° 49.5' W ( -81.82500)
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.