U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 8729598 PUBLICATION DATE: 04/29/2004
Name: HULBERT FIELD
FL
NOAA Chart: 11385 Latitude: 30° 24.4' N ( 30.40670)
USGS Quad: MARY ESTHER Longitude: 86° 42.0' W ( -86.70000)
To reach the tidal bench marks from the Fort Walton Beach City Hall, proceed
west on U.S. Highway 98 for 7.48 km (4.65 mi) to a paved road leading south
(located 0.40 km (0.25 mi) east of the entrance to Hurlburt Field A.F.B.), then
proceed 0.24 km (0.15 mi) south on the paved road to Kissam Street. The bench
marks are along U.S. Highway 98 and Kissam Street. The tide gage and staff were
located on a T-section dock in the intracoastal waterway.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: FLOROSA 2 1962
DESIGNATION: FLOROSA 2
MONUMENTATION: Triangulation Station disk VM#: 10179
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: BG2000
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 30° 24.6' N ( 30.41000) LONGITUDE: 86° 41.8' W ( -86.69670)
The primay bench mark is a disk set in the top of a concrete monument, 0.5 km
(0.3 mi) east of the main entrance to Hurlburt Field A.F.B., 14 m (47 ft) north
of the centerline of the westbound lane of U.S. Highway 98, 0.3 m (1.0 ft) north
of a witness post, 1 m (2 ft) above the level of the highway, and 6 cm (0.2 ft)
above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 8729598 PUBLICATION DATE: 04/29/2004
Name: HULBERT FIELD
FL
NOAA Chart: 11385 Latitude: 30° 24.4' N ( 30.40670)
USGS Quad: MARY ESTHER Longitude: 86° 42.0' W ( -86.70000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9598 A 1977
DESIGNATION: 872 9598 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 10177
AGENCY: National Ocean Survey (NOS) IDB PID#: BG3586
SETTING CLASSIFICATION: Concrete culvert head wall OPUS PID#: BG3586
LATITUDE: 30° 24.6' N ( 30.41000) LONGITUDE: 86° 42.0' W ( -86.70000)
The bench mark is a disk set in top of the east end of the headwall for a
culvert under the driveway leading to the Hurlburt Field Officers' Mess Hall, 39
m (128 ft) east of the SE corner of the Officers' Mess building, 32.74 m (107.4
ft) SSW of the pedestrian bridge over a creek, 14.78 m (48.5 ft) west of a steel
light pole, and 6.89 m (22.6 ft) south of the centerline of the semicircular
dirveway.
BENCH MARK STAMPING: 9598 B 1977
DESIGNATION: 872 9598 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 10178
AGENCY: National Ocean Survey (NOS) IDB PID#: BG3585
SETTING CLASSIFICATION: Concrete culvert head wall OPUS PID#: BG3585
LATITUDE: 30° 24.6' N ( 30.41000) LONGITUDE: 86° 42.0' W ( -86.70000)
The bench mark is a disk set in top of the north end of a concrete culvert
headwall, just north of the large parking lot at Hurlburt Field Air-Ground
Operations School, 122 m (400 ft) north of the school building, 54.86 m (180.0
ft) south of the south edge of the eastbound lane of U.S. Highway 98, 15.06 m
(49.4 ft) ENE of a powerline pole with telephone box No. 60HH attached, and 5.15
m (16.9 ft) east of the centerline of Kissam Street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 8729598 PUBLICATION DATE: 04/29/2004
Name: HULBERT FIELD
FL
NOAA Chart: 11385 Latitude: 30° 24.4' N ( 30.40670)
USGS Quad: MARY ESTHER Longitude: 86° 42.0' W ( -86.70000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: FLOROSA 2 NO 3 1962
DESIGNATION: FLOROSA 2 RM 3
MONUMENTATION: Reference Mark disk VM#: 10180
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: BG2001
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 30° 24.6' N ( 30.41000) LONGITUDE: 86° 41.8' W ( -86.69670)
The bench mark is a disk set in the top of a concrete monument, 21.73 m (71.3
ft) east of bench mark FLOROSA 2 1962, 14.63 m (48.0 ft) north of the centerline
of the westbound lane of U.S. Highway 98, 0.61 m (2.0 ft) above the level of the
highway, 0.49 m (1.6 ft) north of a witness post, and 6 cm (0.2 ft) above ground
level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 8729598 PUBLICATION DATE: 04/29/2004
Name: HULBERT FIELD
FL
NOAA Chart: 11385 Latitude: 30° 24.4' N ( 30.40670)
USGS Quad: MARY ESTHER Longitude: 86° 42.0' W ( -86.70000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: FLOROSA 2 NO 4 1962
DESIGNATION: FLOROSA 2 RM 4
MONUMENTATION: Reference Mark disk VM#: 10181
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: BG2002
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 30° 24.6' N ( 30.41000) LONGITUDE: 86° 41.8' W ( -86.69670)
The bench mark is a disk set in the top of a concrete monument, 126 m (413 ft)
ENE of the east end of the north concrete head wall of a 2 m (7 ft) box culvert
under U.S. Highway 98, 21.55 m (70.7 ft) west of bench mark FLOROSA 2 1962, 15 m
(48 ft) north of the centerline of the westbound lane of the highway, 1 m (2 ft)
above the level of the highway, 0.3 m (1 ft) north of a metal witness post, and
6 cm (0.2 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 8729598 PUBLICATION DATE: 04/29/2004
Name: HULBERT FIELD
FL
NOAA Chart: 11385 Latitude: 30° 24.4' N ( 30.40670)
USGS Quad: MARY ESTHER Longitude: 86° 42.0' W ( -86.70000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: X 298 1967
DESIGNATION: X 298
MONUMENTATION: Bench Mark disk VM#: 10182
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: BG1999
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 30° 24.7' N ( 30.41170) LONGITUDE: 86° 42.1' W ( -86.70170)
The bench mark is a disk located 114 m (375 ft) NW of the junction of the main
entrance road to Hurlburt Field A.F.B. and U.S. Highway 98, 73.15 m (240.0 ft)
north of the centerline of the westbound lane of the highway, 0.67 m (2.2 ft)
south of the NE corner of the fence around the U.S.A.F. Lookout Tower, 0.15 m
(0.5 ft) east of the north/south fence line, and 0.12 m (0.4 ft) east of a
witness post. The bench mark is set 6 cm (0.2 ft) below ground level, crimped
to the top of a copper-clad steel rod driven 7.3 m (24 ft) to refusal, and
encased in a metal pipe.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 8729598 PUBLICATION DATE: 04/29/2004
Name: HULBERT FIELD
FL
NOAA Chart: 11385 Latitude: 30° 24.4' N ( 30.40670)
USGS Quad: MARY ESTHER Longitude: 86° 42.0' W ( -86.70000)
T I D A L D A T U M S
Tidal datums at HULBERT FIELD based on:
LENGTH OF SERIES: 6 MONTHS
TIME PERIOD: June 1977 - November 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 = 0.356
MEAN HIGH WATER MHW = 0.336
MEAN TIDE LEVEL MTL = 0.180
MEAN SEA LEVEL MSL = 0.175
North American Vertical Datum NAVD88 = 0.079
MEAN LOW WATER MLW = 0.024
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
FLOROSA 2 1962 4.724 4.388
9598 A 1977 2.000 1.664
9598 B 1977 3.742 3.406
FLOROSA 2 NO 3 1962 4.775 4.439
FLOROSA 2 NO 4 1962 4.684 4.348
X 298 1967 4.645 4.309
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 8729598 PUBLICATION DATE: 04/29/2004
Name: HULBERT FIELD
FL
NOAA Chart: 11385 Latitude: 30° 24.4' N ( 30.40670)
USGS Quad: MARY ESTHER Longitude: 86° 42.0' W ( -86.70000)
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.