U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  7

                                                                                
Station ID: 8670870                                PUBLICATION DATE:  04/21/2003
Name:       FORT PULASKI, SAVANNAH RIVER                      
            GEORGIA
NOAA Chart: 11513                                  Latitude:         32°  2.0' N
USGS Quad:  FORT PULASKI                           Longitude:        80° 54.1' W


To reach the tidal bench marks from the intersection of State Highway 204 in
Savannah, go easterly 21.1 km (13.1 mi) along U.S. Highway 80, thence 1.2 km
(0.7 mi) northerly along the Fort Pulaski National Monument entrance road,
thence 0.8 km (0.5 mi) westerly along the Tybee Coast Guard Station entrance
road, thence 0.1 km (0.1 mi) northerly along the Savannah Bar Pilot House
entrance road.  The bench marks are located along the entrance road and in the
vicinity of the Savannah Bar Pilot House.  The gage is located in a NOS tide
house on the Pilots Dock located behind the Savannah Bar Pilot House.


                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  5
                         DESIGNATION:          867 0870 TIDAL 5

MONUMENTATION:           Tidal Station disk                        VM#:      625
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID#:  CK0697
SETTING CLASSIFICATION:  Concrete monument


The primary bench mark is a disk set in a concrete post on the south side of the
parking lot at the Savannah Bar Pilots house,  26.49 m (86.9 ft) SE of the SE
corner of the house, 25.30 m (83.0 ft) west of a utility pole, 6.10 m (20.0 ft)
south of and level with the center of the driveway, 1.90 m (6.2 ft) NE of a
witness post, and at ground level.



                         BENCH MARK STAMPING:  7
                         DESIGNATION:          867 0870 TIDAL 7

MONUMENTATION:           Tidal Station disk                        VM#:      627
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID#:  CK0695
SETTING CLASSIFICATION:  Concrete foundation


The bench mark is a disk set flush in the NE corner of the cement foundation of
the Park Ranger's house, 60.87 m (199.7 ft) SSW of the SW corner of the Savannah
Bar Pilots building, 87.36 m (286.6 ft) NW of the NW corner of the Park Ranger's
garage, and at ground level.  NOTE - part of the south side of the disk is
covered by the corner of the house but the mark appears to be in good condition.
A tape may have to be used instead of a rod.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  7

                                                                                
Station ID: 8670870                                PUBLICATION DATE:  04/21/2003
Name:       FORT PULASKI, SAVANNAH RIVER                      
            GEORGIA
NOAA Chart: 11513                                  Latitude:         32°  2.0' N
USGS Quad:  FORT PULASKI                           Longitude:        80° 54.1' W


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  11 1944
                         DESIGNATION:          867 0870 TIDAL 11

MONUMENTATION:           Tidal Station disk                        VM#:      628
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID#:  CK0700
SETTING CLASSIFICATION:  Concrete step


The bench mark is a disk set flush in concrete slab east of the Savannah Bar
Pilots house near the NE corner of a 1 m x 3 m (2 ft x 9 ft) concrete slab that
was once a step at the entrance to a recreation hall, 31.21 m (102.4 ft) east of
and level with the center of the road, 23.01 m (75.5 ft) south of the extended
center of a driveway leading to the Pilots house, 3.41 m (11.2 ft) NNE of a
witness post, 0.40 m (1.3 ft) SE of a witness post, and 0.15 m (0.5 ft) above
ground level.



                         BENCH MARK STAMPING:  NO 1 1949
                         DESIGNATION:          867 0870 TIDAL 1

MONUMENTATION:           Tidal Station disk                        VM#:      629
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID#:  CK0692
SETTING CLASSIFICATION:  Concrete bridge


The bench mark is a disk set at the north end of the east concrete wingwall of a
bridge spanning the South Channel of the Savannah River, along the entrance road
to Fort Pulaski National Monument, 10.61 m (34.8 ft) south of the north end of
the east bridge rail, 3.29 m (10.8 ft) east of the centerline of the bridge, and
0.21 m (0.7 ft) above the level of the road.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  7

                                                                                
Station ID: 8670870                                PUBLICATION DATE:  04/21/2003
Name:       FORT PULASKI, SAVANNAH RIVER                      
            GEORGIA
NOAA Chart: 11513                                  Latitude:         32°  2.0' N
USGS Quad:  FORT PULASKI                           Longitude:        80° 54.1' W


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  NO 2 1949
                         DESIGNATION:          867 0870 TIDAL 2

MONUMENTATION:           Tidal Station disk                        VM#:      630
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID#:  CK0691
SETTING CLASSIFICATION:  Concrete bridge


The bench mark is a disk set in the south end of the east concrete wingwall of a
bridge spanning the South Channel of the Savannah River, along the entrance road
to Fort Pulaski National Monument, 9.51 m (31.2 ft) north of the south end of
the bridge rail, 3.41 m (11.2 ft) east of the road centerline, and  0.21 m (0.7
ft) above the level of the road.



                         BENCH MARK STAMPING:  N 323 1974
                         DESIGNATION:          N 323

MONUMENTATION:           Vertical Control disk                     VM#:      631
AGENCY:                  National Geodetic Survey (NGS)            PID#:  CK0693
SETTING CLASSIFICATION:  Copper-clad steel rod


The bench mark is a disk located near the Fort Pulaski Maintenance Shop along
the Tybee Coast Guard Station entrance road, 38.19 m (125.3 ft) south of and
level with the center of the road, 15.00 m (49.2 ft) SSW of the SW corner of the
Fort Pulaski Maintenance Shop, 4.69 m (15.4 ft) north of a witness post, and
0.91 m (3.0 ft) west of the east edge of a foundation for a radio tower.  The
bench mark is at ground level, crimped to a copper-coated steel rod driven 19.5
m (64 ft) to refusal, and encased in a 4-inch PVC pipe and concrete kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  7

                                                                                
Station ID: 8670870                                PUBLICATION DATE:  04/21/2003
Name:       FORT PULASKI, SAVANNAH RIVER                      
            GEORGIA
NOAA Chart: 11513                                  Latitude:         32°  2.0' N
USGS Quad:  FORT PULASKI                           Longitude:        80° 54.1' W


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  P 323 1974
                         DESIGNATION:          P 323

MONUMENTATION:           Vertical Control disk                     VM#:      632
AGENCY:                  National Geodetic Survey (NGS)            PID#:  CK0694
SETTING CLASSIFICATION:  Copper-clad steel rod


The bench mark is a disk located 23.41 m (76.8 ft) SW of the SW corner of the
Savannah Bar Pilots house, 10.10 m (33.1 ft) south of and level with the
extended center of a driveway, 4.30 m (14.1 ft) west of a utility pole with 2
guy wires and a transformer, and 1.19 m (3.9 ft) east of a witness post.  The
bench mark is at ground level, crimped to a copper-coated steel rod driven 17.1
m (56 ft) to refusal, and encased in a 4-inch PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  0870 K 1977
                         DESIGNATION:          867 0870 K TIDAL

MONUMENTATION:           Tidal Station disk                        VM#:      634
AGENCY:                  National Ocean Service (NOS)              PID#:  CK5786
SETTING CLASSIFICATION:  Unspecified deep rod


The bench mark is a disk located along the river west of the Savannah Bar Pilots
dock, 27.71 m (90.9 ft) north of a utility pole with 2 guy wires and a
transformer, 23.20 m (76.1 ft) west of the NW corner of the extended center of
the driveway, 2.50 m (8.2 ft) east of a palm tree, and 2.20 m (7.2 ft) south of
a witness post.  The bench mark is at ground level, crimped to an unspecified
steel rod driven 2.10 m (6.9 ft) to refusal and encased in a 4-inch PVC pipe and
concrete kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  7

                                                                                
Station ID: 8670870                                PUBLICATION DATE:  04/21/2003
Name:       FORT PULASKI, SAVANNAH RIVER                      
            GEORGIA
NOAA Chart: 11513                                  Latitude:         32°  2.0' N
USGS Quad:  FORT PULASKI                           Longitude:        80° 54.1' W


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  0870 L 1978
                         DESIGNATION:          867 0870 L TIDAL

MONUMENTATION:           Tidal Station disk                        VM#:      635
AGENCY:                  National Ocean Service (NOS)              PID#:  CK5785
SETTING CLASSIFICATION:  Concrete monument


The bench mark is a disk set in a concrete monument near the intersection of two
roads leading to the Fort Pulaski National Monument and the Tybee Coast Guard
Station, 7.41 m (24.3 ft) SW of the centerline of a road leading to the Tybee
Coast Guard Station, 2.10 m (6.9 ft) SE of a 0.36 m (1.2 ft) diameter palm tree,
1.58 m (5.2 ft) WSW of a 0.30 m (1.0 ft) palm tree, 0.20 m (0.7 ft) NE of a
witness post, and 0.30 m (1.0 ft) below the level of the Tybee Coast Guard
Station entrance road.



                         BENCH MARK STAMPING:  0870 M 2001
                         DESIGNATION:          867 0870 M

MONUMENTATION:           Tidal Station disk                        VM#:    16513
AGENCY:                  National Ocean Service (NOS)              PID#:  DG4147
SETTING CLASSIFICATION:  Concrete foundation


The bench mark is a disk set flush in old guy wire concrete foundation near the
north part of the picnic area along the Tybee Coast Guard Station entrance road,
99.20 m (325.5 ft) SE of a power pole having no number and in line with a Coast
Guard radio tower, 62.85 m (206.2 ft) SW of the centerline of the road leading
to the Tybee Coast Guard Station, and 31.14 m (102.2 ft) east of the east corner
of a white cinderblock pump house.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  7

                                                                                
Station ID: 8670870                                PUBLICATION DATE:  04/21/2003
Name:       FORT PULASKI, SAVANNAH RIVER                      
            GEORGIA
NOAA Chart: 11513                                  Latitude:         32°  2.0' N
USGS Quad:  FORT PULASKI                           Longitude:        80° 54.1' W


                            T I D A L   D A T U M S 


Tidal datums at FORT PULASKI, SAVANNAH RIVER based on:

     LENGTH OF SERIES:      19 Years
     TIME PERIOD:           January 1983 - December 2001
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:   


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     HIGHEST OBSERVED WATER LEVEL (10/15/1947)         =  3.323
     MEAN HIGHER HIGH WATER                     MHHW   =  2.287
     MEAN HIGH WATER                            MHW    =  2.174
     North American Vertical Datum              NAVD88 =  1.235
     MEAN SEA LEVEL                             MSL    =  1.165
     MEAN TIDE LEVEL                            MTL    =  1.119
     MEAN LOW WATER                             MLW    =  0.066
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (03/20/1936)         = -1.401

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     5                                           3.811    1.638
     7                                           3.264    1.091
     11 1944                                     3.459    1.286
     NO 1 1949                                   3.856    1.682
     NO 2 1949                                   3.805    1.631
     N 323 1974                                  3.002    0.829
     P 323 1974                                  3.674    1.500
     0870 K 1977                                 3.990    1.816
     0870 L 1978                                 2.897    0.723
     0870 M 2001                                 3.350    1.177


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  7

                                                                                
Station ID: 8670870                                PUBLICATION DATE:  04/21/2003
Name:       FORT PULASKI, SAVANNAH RIVER                      
            GEORGIA
NOAA Chart: 11513                                  Latitude:         32°  2.0' N
USGS Quad:  FORT PULASKI                           Longitude:        80° 54.1' 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 (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 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.