U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 8729808 PUBLICATION DATE: 05/20/2004
Name: LITTLE SABINE BAY
FL
NOAA Chart: 11383 Latitude: 30° 20.2' N ( 30.33670)
USGS Quad: GULF BREEZE Longitude: 87° 8.8' W ( -87.14670)
To reach the tidal bench marks at Pensacola Beach from the south end of the
highway bridge over the Santa Rosa Sound, proceed south on State Highway S-399
(Pensacola Beach Road/Via De Luna Drive) for 1.1 km (0.7 mi) to the Union 76
station on the west side of the highway. The bench marks are along the highway
between the bridge and the Howard Johnson sign, and the gage site and staff were
located at the concrete dock behind the station.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 9808 A 1977
DESIGNATION: 872 9808 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 10254
AGENCY: National Ocean Survey (NOS) IDB PID#: BG4567
SETTING CLASSIFICATION: Concrete base for sign OPUS PID#: BG4567
LATITUDE: 30° 20.2' N ( 30.33670) LONGITUDE: 87° 8.7' W ( -87.14500)
The primary bench mark is a disk set in the concrete base for the "Union 76"
sign, at the NE corner of the Union 76 gas station parking lot, 17.68 m (58.0
ft) west of the centerline of State Road C-399, 13.20 m (43.3 ft) SE of the SE
corner of the ELK's Lodge # 2256, 2.74 m (9.0 ft) SW of a concrete light pole,
and 1.95 m (6.4 ft) NE of a steel light pole.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8729808 PUBLICATION DATE: 05/20/2004
Name: LITTLE SABINE BAY
FL
NOAA Chart: 11383 Latitude: 30° 20.2' N ( 30.33670)
USGS Quad: GULF BREEZE Longitude: 87° 8.8' W ( -87.14670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9808 B 1977
DESIGNATION: 872 9808 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 10255
AGENCY: National Ocean Survey (NOS) IDB PID#: BG4568
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 30° 20.1' N ( 30.33500) LONGITUDE: 87° 8.6' W ( -87.14330)
The bench mark is a disk located in a triangular traffic island, 15.09 m (49.5
ft) SE of a light pole, 12.41 m (40.7 ft) WSW of the centerline of State Road
C-399, 7.10 m (23.3 ft) east of the centerline of Fort Pickens Road, 0.49 m (1.6
ft) south of the north edge of the traffic island. The bench mark is set 0.15 m
(0.5 ft) below ground level, crimped to the top of a copper-clad steel rod
driven an unspecified depth, and encased in a PVC pipe and concrete kickblock.
NOTE: Mark not found in 2003 by US Power Squadron.
BENCH MARK STAMPING: 9806 A 1977
DESIGNATION: 872 9806 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 10256
AGENCY: National Ocean Survey (NOS) IDB PID#: BG4574
SETTING CLASSIFICATION: Concrete base for sign OPUS PID:
LATITUDE: 30° 20.1' N ( 30.33500) LONGITUDE: 87° 8.2' W ( -87.13670)
The bench mark is a disk set in top of the concrete base for the Howard Johnson
Motel sign, 1.8 km (1.1 mi) SE of the highway bridge over Santa Rosa Sound,
14.94 m (49.0 ft) east of a light pole at the parking lot, 12.83 m (42.1 ft)
south of the centerline of State Road C-399 (Via De Luna Drive), 8.23 m (27.0
ft) SW of a fire hydrant, 0.61 m (2.0 ft) west of the west side of the
foundation, 0.18 m (0.6 ft) south of the north face of the foundation, and 0.21
m (0.7 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8729808 PUBLICATION DATE: 05/20/2004
Name: LITTLE SABINE BAY
FL
NOAA Chart: 11383 Latitude: 30° 20.2' N ( 30.33670)
USGS Quad: GULF BREEZE Longitude: 87° 8.8' W ( -87.14670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9808 CC 1984
DESIGNATION: 872 9808 CC TIDAL
MONUMENTATION: Tidal Station disk VM#: 16543
AGENCY: National Ocean Service (NOS) IDB PID#: BG4570
SETTING CLASSIFICATION: Concrete footing OPUS PID:
LATITUDE: 30° 19.9' N ( 30.33170) LONGITUDE: 87° 8.4' W ( -87.14000)
The bench mark is a disk set in the top of the concrete footing of a two-story
building at the Pensacola Public Beach, 91 m (300 ft) east of the municipal
pier, 6.07 m (19.9 ft) south of the south curb of the parking lot, 1.19 m (3.9
ft) south of the NW corner of the building, 0.21 m (0.7 ft) west of the west
wall of the building, and 0.98 m (3.2 ft) east of the NE corner of a snack bar.
BENCH MARK STAMPING: 9808 DD 1984
DESIGNATION: 872 9808 DD TIDAL
MONUMENTATION: Tidal Station disk VM#: 16544
AGENCY: National Ocean Service (NOS) IDB PID#: BG4569
SETTING CLASSIFICATION: Concrete base for sign OPUS PID:
LATITUDE: 30° 20.1' N ( 30.33500) LONGITUDE: 87° 8.5' W ( -87.14170)
The bench mark is a disk set in top of the concrete base for a sign, NE of the
junction of Fort Pickens Road and State Road C-399, 45.14 m (148.1 ft) NE of a
traffic light pole, 27.58 m (90.5 ft) west of the west corner of a 7 Eleven
convenience store, and 1.49 m (4.9 ft) NW of the "7 Eleven" sign post. NOTE:
Mark not found in 2003 by US Power Squadron.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8729808 PUBLICATION DATE: 05/20/2004
Name: LITTLE SABINE BAY
FL
NOAA Chart: 11383 Latitude: 30° 20.2' N ( 30.33670)
USGS Quad: GULF BREEZE Longitude: 87° 8.8' W ( -87.14670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9808 EE 1984
DESIGNATION: 872 9808 EE TIDAL
MONUMENTATION: Tidal Station disk VM#: 16545
AGENCY: National Ocean Service (NOS) IDB PID#: BG4566
SETTING CLASSIFICATION: Concete walkway OPUS PID:
LATITUDE: 30° 20.2' N ( 30.33670) LONGITUDE: 87° 8.6' W ( -87.14330)
The bench mark is a disk set in the concrete walkway around the bathhouse at a
public park (across the highway from bench mark 9808 A 1977), 20.42 m (67.0 ft)
east of the centerline of State Road C-399, 8.93 m (29.3 ft) SSW of a light
pole, and 2.19 m (7.2 ft) NE of the NE corner of the bathhouse.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8729808 PUBLICATION DATE: 05/20/2004
Name: LITTLE SABINE BAY
FL
NOAA Chart: 11383 Latitude: 30° 20.2' N ( 30.33670)
USGS Quad: GULF BREEZE Longitude: 87° 8.8' W ( -87.14670)
T I D A L D A T U M S
Tidal datums at LITTLE SABINE BAY based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: March 1977 - May 1977
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8729840 PENSACOLA, PENSACOLA BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.392
MEAN HIGH WATER MHW = 0.376
MEAN TIDE LEVEL MTL = 0.196
MEAN SEA LEVEL MSL = 0.193
North American Vertical Datum NAVD88 = 0.140
MEAN LOW WATER MLW = 0.016
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
9808 A 1977 1.568 1.192
9808 B 1977 1.761 1.385
9806 A 1977 1.867 1.491
9808 CC 1984 4.144 3.768
9808 DD 1984 1.750 1.374
9808 EE 1984 1.241 0.865
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 8729808 PUBLICATION DATE: 05/20/2004
Name: LITTLE SABINE BAY
FL
NOAA Chart: 11383 Latitude: 30° 20.2' N ( 30.33670)
USGS Quad: GULF BREEZE Longitude: 87° 8.8' W ( -87.14670)
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.