U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8721222 PUBLICATION DATE: 07/12/2006
Name: PACKWOOD PLACE
FLORIDA
NOAA Chart: 11485 Latitude: 28° 56.4' N
USGS Quad: EDGEWATER Longitude: 80° 52.2' W
To reach the tidal bench marks from the Post Office in Edgewater, proceed 5.8 km
(3.6 mi) south on U.S. Highway 1 to Packwood Road (a dirt road) leading east,
then 1.1 km (0.7 mi) east along Packwood Road to the parking lot at the Packwood
Restaurant and Fish Company. Follow the driveway, at the southern edge of the
parking lot, which leads east to the residence of Mr. Brooks Corbett. The bench
marks are located in the vicinity of the dirt road. The tide gage and staff
were located on the NE corner of the north side of the T-section dock 76 m (250
ft) south of Intracoastal Waterway Channel Marker #64.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 1222 A 1979
DESIGNATION: 872 1222 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 10766
AGENCY: National Ocean Survey (NOS) PID#: AK6908
SETTING CLASSIFICATION: Copper-clad steel rod
The primary bench mark is a disk located in the back yard of Brooks Corbetts'
residence, 87 m (285 ft) SE of the restaurant, 13.41 m (44.0 ft) SW of the
beginning of the wooden dock on which the tide gage was located, 9.14 m (30.0
ft) SE of the largest cedar tree in the vicinity, 7.92 m (26.0 ft) south of the
SE corner of the tin workshed, and 0.91 m (3.0 ft) NE of the east corner of a
tin shed which houses a water pump. The bench mark is set 0.03 m (0.1 ft) below
ground level, crimped to the top of a copper-coated steel rod driven 14.63 m
(48.0 ft), and encased inside a PVC pipe surrounded by concrete.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8721222 PUBLICATION DATE: 07/12/2006
Name: PACKWOOD PLACE
FLORIDA
NOAA Chart: 11485 Latitude: 28° 56.4' N
USGS Quad: EDGEWATER Longitude: 80° 52.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1222 B 1979
DESIGNATION: 872 1222 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 10767
AGENCY: National Ocean Survey (NOS) PID#: AK6909
SETTING CLASSIFICATION: Concrete post
The bench mark is a disk set flush in the top of a 12-inch diameter bell shaped
concrete monument on the north side of the dirt road leading ENE to the
residence of Mr. Brooks Corbett, 33.53 m (110.0 ft) SW of the southernmost
corner of the clubhouse and restaurant at Packwood Place, 3.66 m (12.0 ft) NE of
the centerline of the dirt road, 0.91 m (3.0 ft) south of the lone palm tree at
the entrance to Mr. Corbett's property, and 0.03 m (0.1 ft) below ground level.
BENCH MARK STAMPING: IWV 53 1951 JACKSONVILLE
DESIGNATION: IWV 53
MONUMENTATION: Tidal Station disk VM#: 10768
AGENCY: COE PID#: AK6907
SETTING CLASSIFICATION: Concrete post
The bench mark is a disk set flush in the top of a concrete monument, 19.51 m
(64.0 ft) NE of the centerline of dirt road leading NW, 18.96 m (62.2 ft) SW of
Reference Mark IWV 53 RM 1 JACKSONVILLE, 18.59 m (61.0 ft) SE of Reference Mark
IWV 53 RM 2 JACKSONVILLE, 5.49 m (18.0 ft) NW of the NW corner of a triplex
apartment building, and at ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8721222 PUBLICATION DATE: 07/12/2006
Name: PACKWOOD PLACE
FLORIDA
NOAA Chart: 11485 Latitude: 28° 56.4' N
USGS Quad: EDGEWATER Longitude: 80° 52.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: IWV 53 RM 1 JACKSONVILLE
DESIGNATION: IWV 53 RM 1
MONUMENTATION: Tidal Station disk VM#: 10769
AGENCY: COE PID#: AK6906
SETTING CLASSIFICATION: Concrete post
The bench mark is a disk set flush in the top of a concrete monument, 29.57 m
(97.0 ft) SE of Reference Mark IWV 53 RM 2 JACKSONVILLE, 16.31 m (53.5 ft) north
of the northernmost corner of a triplex apartment building, 9.91 m (32.5 ft) SW
of the shoreline, and 0.06 m (0.2 ft) above ground level.
BENCH MARK STAMPING: IWV 53 RM 2 JACKSONVILLE
DESIGNATION: IWV 53 RM 2
MONUMENTATION: Tidal Station disk VM#: 10770
AGENCY: COE PID#: AK6905
SETTING CLASSIFICATION: Concrete post
The bench mark is a disk set flush in the top of a concrete monument, 8.53 m
(28.0 ft) SW of a telephone pole, 6.19 m (20.0 ft) NE of the centerline of the
dirt road leading NW, and 0.18 m (0.6 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8721222 PUBLICATION DATE: 07/12/2006
Name: PACKWOOD PLACE
FLORIDA
NOAA Chart: 11485 Latitude: 28° 56.4' N
USGS Quad: EDGEWATER Longitude: 80° 52.2' W
T I D A L D A T U M S
Tidal datums at PACKWOOD PLACE based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: February 1979 - March 1979
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8721120 DAYTONA BEACH SHORES
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER (MHHW) = 0.381
MEAN HIGH WATER (MHW) = 0.331
NORTH AMERICAN VERTICAL DATUM-1988 (NAVD) = 0.318
MEAN TIDE LEVEL (MTL) = 0.169
MEAN SEA LEVEL (MSL) = 0.167
MEAN LOW WATER (MLW) = 0.007
MEAN LOWER LOW WATER (MLLW) = 0.000
National Geodetic Vertical Datum (NGVD 29)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
1222 A 1979 0.458 0.127
1222 B 1979 1.341 1.010
IWV 53 1951 JACKSONVILLE 1.145 0.814
IWV 53 RM 1 JACKSONVILLE 1.173 0.842
IWV 53 RM 2 JACKSONVILLE 1.745 1.414
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8721222 PUBLICATION DATE: 07/12/2006
Name: PACKWOOD PLACE
FLORIDA
NOAA Chart: 11485 Latitude: 28° 56.4' N
USGS Quad: EDGEWATER Longitude: 80° 52.2' W
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 (NAVD 88).
NGVD 29 is a fixed datum adopted as a national standard geodetic reference for
heights but is now considered superseded. NGVD 29 is sometimes referred to as
Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological
Survey Topographic Quads. NGVD 29 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 NGVD 29 are available from the National
Geodetic Survey (NGS) data base via the World Wide Web at
National Geodetic Survey.
NAVD 88 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. NAVD 88 replaces NGVD 29 as the national
standard geodetic reference for heights. Bench mark elevations relative to
NAVD 88 are available from NGS through the World Wide Web at
National Geodetic Survey.
NGVD 29 and NAVD 88 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 NAVD 88 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have NAVD 88 elevations.
The NAVD 88 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, NAVD 88 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from NAVD 88 elevations listed for
each bench mark in the NGS database.