U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8729567 PUBLICATION DATE: 05/12/2004
Name: CINCO BAYOU
FL
NOAA Chart: 11388 Latitude: 30° 25.7' N ( 30.42830)
USGS Quad: FORT WALTON BEACH Longitude: 86° 37.9' W ( -86.63170)
To reach the tidal bench marks from the junction of U.S. Highway 98 and State
Highway 189 (Beal Parkway) in Fort Walton Beach, proceed north on State Highway
189 for 5.3 km (3.3 mi) to the intersection of Pelham Road, then east on Pelham
Road for 0.6 km (0.4 mi) to the intersection of East Sunset Boulevard for 0.3 km
(0.2 mi) to the residence of W.J. McCoy, on the east side of the road. The
bench marks are along East Sunset Boulevard and Pelham Road. The gage and staff
were located on the dock behind the McCoy residence.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 9567 A 1977
DESIGNATION: 872 9567 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 10171
AGENCY: National Ocean Survey (NOS) IDB PID#: BG4621
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 30° 25.9' N ( 30.43170) LONGITUDE: 86° 38.0' W ( -86.63330)
The primary bench mark is a disk located NW of the NW corner of the McCoy
residence, 9.45 m (31.0 ft) south of the centerline of Sunset Drive, and 1.71 m
(5.6 ft) east of powerline pole No. 32766-52660 with a witness sign. The bench
mark is set 6 cm (0.2 ft) below ground level, crimped to the top of a galvanized
steel rod driven 3.8 m (12.5 ft) to refusal, and encased in a PVC pipe and
concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8729567 PUBLICATION DATE: 05/12/2004
Name: CINCO BAYOU
FL
NOAA Chart: 11388 Latitude: 30° 25.7' N ( 30.42830)
USGS Quad: FORT WALTON BEACH Longitude: 86° 37.9' W ( -86.63170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9567 B 1977
DESIGNATION: 872 9567 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 10172
AGENCY: National Ocean Survey (NOS) IDB PID#: BG4620
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 30° 25.9' N ( 30.43170) LONGITUDE: 86° 38.0' W ( -86.63330)
The bench mark is a disk located 66 m (215 ft) north of bench mark 9567 A 1977,
10.73 m (35.2 ft) SE of the SE corner of the last red brick house on the west
side of East Sunset Boulevard, 7.83 m (25.7 ft) west of the centerline of East
Sunset Boulevard, and 0.67 m (2.2 ft) NE of powerline pole No. 32764-52862.
The bench mark is set 6 cm (0.2 ft) below ground level, crimped to the top of a
galvanized steel rod driven 4 m (13 ft) to refusal, and encased in a PVC pipe
and concrete kickblock.
BENCH MARK STAMPING: 9567 C 1977
DESIGNATION: 872 9567 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 10173
AGENCY: National Ocean Survey (NOS) IDB PID#: BG4619
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 30° 26.0' N ( 30.43330) LONGITUDE: 86° 38.0' W ( -86.63330)
The bench mark is a disk set in the top of a concrete monument, 107 m (350 ft)
NNE of bench mark 9567 B 1977, 11.43 m (37.5 ft) WSW of the SW corner of a
stucco house on East Sunset Boulevard (between Beaulah and William Streets), 5 m
(16 ft) east of the centerline of East Sunset Boulevard, and 0.61 m (2.0 ft)
west of a powerline polem and at ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8729567 PUBLICATION DATE: 05/12/2004
Name: CINCO BAYOU
FL
NOAA Chart: 11388 Latitude: 30° 25.7' N ( 30.42830)
USGS Quad: FORT WALTON BEACH Longitude: 86° 37.9' W ( -86.63170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9567 D 1977
DESIGNATION: 872 9567 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 10174
AGENCY: National Ocean Survey (NOS) IDB PID#: BG4618
SETTING CLASSIFICATION: Concrete monument OPUS PID#: BG4618
LATITUDE: 30° 26.0' N ( 30.43330) LONGITUDE: 86° 38.0' W ( -86.63330)
The bench mark is a disk set in the top of a concrete monument, 76 m (250 ft)
NNW of bench mark 9567 C 1977, between Virginia and William Streets, 16 m (53
ft) ESE of the SE corner of a brick house on the west side of East Sunset
Boulevard, 6.04 m (19.8 ft) west of the centerline of East Sunset Boulevard, 1 m
(3 ft) ESE of powerline pole No. 32766-52744, and at ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8729567 PUBLICATION DATE: 05/12/2004
Name: CINCO BAYOU
FL
NOAA Chart: 11388 Latitude: 30° 25.7' N ( 30.42830)
USGS Quad: FORT WALTON BEACH Longitude: 86° 37.9' W ( -86.63170)
T I D A L D A T U M S
Tidal datums at CINCO BAYOU based on:
LENGTH OF SERIES: 4 MONTHS
TIME PERIOD: May 1977 - August 1977
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8729538 GARNIER BAYOU, SHALIMAR
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.142
MEAN HIGH WATER MHW = 0.135
MEAN TIDE LEVEL MTL = 0.073
MEAN SEA LEVEL MSL = 0.069
North American Vertical Datum NAVD88 = 0.051
MEAN LOW WATER MLW = 0.011
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
9567 A 1977 6.703 6.568
9567 B 1977 6.184 6.049
9567 C 1977 5.794 5.659
9567 D 1977 6.158 6.023
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8729567 PUBLICATION DATE: 05/12/2004
Name: CINCO BAYOU
FL
NOAA Chart: 11388 Latitude: 30° 25.7' N ( 30.42830)
USGS Quad: FORT WALTON BEACH Longitude: 86° 37.9' W ( -86.63170)
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.