U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
Station ID: 8729548 PUBLICATION DATE: 07/12/2004
Name: CAMP PINCHOT
FL
NOAA Chart: 11388 Latitude: 30° 28.2' N ( 30.47000)
USGS Quad: FORT WALTON BEACH Longitude: 86° 35.6' W ( -86.59330)
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 12.6 km (7.9 mi) to Camp Pinchot Road, then turn right and proceed SE on
Camp Pinchot Road for 0.6 km (0.4 mi) to Camp Pinchot (U.S. Air Force Property).
The bench marks are at Camp Pinchot and along State Highway 189. The tide gage
and staff were on the pier east of the Base Commander's house.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 9548 B 1977
DESIGNATION: 872 9548 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 10161
AGENCY: National Ocean Survey (NOS) IDB PID#: BG4611
SETTING CLASSIFICATION: Concrete footing OPUS PID:
LATITUDE: 30° 28.3' N ( 30.47170) LONGITUDE: 86° 35.6' W ( -86.59330)
The primary bench mark is a disk set in the concrete footing for Building #
1551, 17.80 m (58.4 ft) SW of the centerline of Camp Pinchot Road, 6.71 m (22.0
ft) NW of the centerline of the paved drive leading SW, 2.13 m (7.0 ft) SW of
powerline pole No. P40-B, and 0.55 m (1.8 ft) south of the east corner of the
building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
Station ID: 8729548 PUBLICATION DATE: 07/12/2004
Name: CAMP PINCHOT
FL
NOAA Chart: 11388 Latitude: 30° 28.2' N ( 30.47000)
USGS Quad: FORT WALTON BEACH Longitude: 86° 35.6' W ( -86.59330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9548 C 1977
DESIGNATION: 872 9548 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 10162
AGENCY: National Ocean Survey (NOS) IDB PID#: BG4612
SETTING CLASSIFICATION: Concrete ramp OPUS PID:
LATITUDE: 30° 28.3' N ( 30.47170) LONGITUDE: 86° 35.6' W ( -86.59330)
The bench mark is a disk set in top of the concrete ramp to Building No. 1552,
56.88 m (186.6 ft) SW of bench mark 9548 B 1977, 33.71 m (110.6 ft) NNW of the
NW corner of Building No. 1553, 16.70 m (54.8 ft) west of powerline pole No.
79240190, and 4.02 m (13.2 ft) east of the south corner of the building.
BENCH MARK STAMPING: 9548 D 1977
DESIGNATION: 872 9548 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 10163
AGENCY: National Ocean Survey (NOS) IDB PID#: BG4610
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 30° 28.3' N ( 30.47170) LONGITUDE: 86° 35.6' W ( -86.59330)
The bench mark is a disk set in the top of a concrete monument, 7 m (23.0 ft)
west of the center of the entrance gate to Camp Pinchot, 6.71 m (22.0 ft) SW of
the centerline of Camp Pinchot Road, 5.49 m (18.0 ft) NW of a hurricane fence,
and at ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
Station ID: 8729548 PUBLICATION DATE: 07/12/2004
Name: CAMP PINCHOT
FL
NOAA Chart: 11388 Latitude: 30° 28.2' N ( 30.47000)
USGS Quad: FORT WALTON BEACH Longitude: 86° 35.6' W ( -86.59330)
T I D A L D A T U M S
Tidal datums at CAMP PINCHOT based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: May 1992 - June 1992
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 = 0.134
MEAN HIGH WATER MHW = 0.134
MEAN TIDE LEVEL MTL = 0.069
MEAN SEA LEVEL MSL = 0.065
MEAN LOW WATER MLW = 0.004
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
9548 B 1977 3.959 3.825
9548 C 1977 4.349 4.215
9548 D 1977 4.396 4.262
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
Station ID: 8729548 PUBLICATION DATE: 07/12/2004
Name: CAMP PINCHOT
FL
NOAA Chart: 11388 Latitude: 30° 28.2' N ( 30.47000)
USGS Quad: FORT WALTON BEACH Longitude: 86° 35.6' W ( -86.59330)
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.