U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  5

                                                   PUBLICATION DATE:  11/13/1990
Station ID: 8664878                                SUPERCEDED DATE:   04/21/2003
Name:       OLD CAPERS BACK LANDING, CAPERS ISLAND, SANTEE PAS
            SOUTH CAROLINA
NOAA Chart: 11521                                  Latitude:         32° 52.2' N
USGS Quad:  CAPERS INLET4                          Longitude:        79° 41.2' W


To reach the tidal bench marks from Capers Inlet, proceed north along Capers
Creek by boat for 2 miles (3 km) to Santee Pass, then NE and east along Santee
Pass for 1 mile (2 km) to the 90 degree bend in the river.  The bench marks are
on Capers Island, adjacent to a road/path leading from the landing to the ocean.
 The tide gage and staff were on the end of a small dock.


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


                 PRIMARY BENCH MARK STAMPING:  OCL NO 1 1975

MONUMENTATION:           Survey Disk                               VM#:     4109
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Copper-clad Steel Rod


The bench mark is set at the foot of the dock, 22.5 feet (6.9 m) east of the
east corner of the dock, 18.5 feet (5.6 m) east of a 4x4-inch post with sign
Closed Area, and 1.9 feet (0.6 m) south of a witness post with sign.  The bench
mark is 0.3 foot (0.1 m) above grade, crimped to a copper-clad steel rod driven
an unspecified depth to refusal, and encased in a 4-inch PVC pipe and concrete
kickblock.



                         BENCH MARK STAMPING:  OCL NO 2 1975

MONUMENTATION:           Survey Disk                               VM#:     4110
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Copper-clad Steel Rod


The bench mark is set along an old palmetto log road in the marsh, 169.1 feet
(51.5 m) SSE of Bench Mark OCL NO 1 1975, 4 feet (1 m) ENE of the centerline of
the palmetto road, and 1.6 feet (0.5 m) WSW of a witness post with sign.  The
bench mark is 0.3 foot (0.1 m) above grade, crimped to a copper-clad steel rod
driven an unspecified depth 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  2 of  5

                                                   PUBLICATION DATE:  11/13/1990
Station ID: 8664878                                SUPERCEDED DATE:   04/21/2003
Name:       OLD CAPERS BACK LANDING, CAPERS ISLAND, SANTEE PAS
            SOUTH CAROLINA
NOAA Chart: 11521                                  Latitude:         32° 52.2' N
USGS Quad:  CAPERS INLET4                          Longitude:        79° 41.2' W


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


                         BENCH MARK STAMPING:  OCL NO 3 1975

MONUMENTATION:           Survey Disk                               VM#:     4111
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Copper-clad Steel Rod


The bench mark is set near the edge of the woods, 314.7 feet (95.9 m) SSE of
Bench Mark OCL NO 2 1975, 74.2 feet (22.6 m) south of power pole #141416, 9.7
feet (3.0 m) NE of a 2.0-foot (0.6 m) diameter palmetto tree, and 1.5 feet   
(0.5 m) NNE of a witness post with sign.  The bench mark is 0.2 foot (0.1 m)
above grade, crimped to a copper-clad steel rod driven an unspecified depth to
refusal, and encased in a 4-inch PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  OCL NO 4 1975

MONUMENTATION:           Survey Disk                               VM#:     4112
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Shallow-set Pipe


The bench mark is set in a palmetto grove along the path to the ocean, 51.5 feet
(15.7 m) south of Bench Mark OCL NO 3 1975, 5 feet (1.5 m) NE of the path, 3.8
feet (1.2 m) SW of a 2.0-foot (0.6 m) diameter palmetto tree, 3.5 feet     (1.1
m) NW of a 2.0-foot (0.6 m) diameter palmetto tree, and 2.2 feet (0.7 m) west of
a witness post with sign.  The bench mark is 0.2 foot (0.1 m) above grade,
brazed to a 4-foot (1 m) long, 2-inch copper pipe encased in concrete.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                   PUBLICATION DATE:  11/13/1990
Station ID: 8664878                                SUPERCEDED DATE:   04/21/2003
Name:       OLD CAPERS BACK LANDING, CAPERS ISLAND, SANTEE PAS
            SOUTH CAROLINA
NOAA Chart: 11521                                  Latitude:         32° 52.2' N
USGS Quad:  CAPERS INLET4                          Longitude:        79° 41.2' W


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


                         BENCH MARK STAMPING:  OCL NO 5 1975

MONUMENTATION:           Survey Disk                               VM#:     4113
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Shallow-set Pipe


The bench mark is set along the path to the ocean, 83.0 feet (25.3 m) SE of
Bench Mark OCL NO 4 1975, 13.6 feet (4.1 m) NNE of a 2.5-foot (0.8 m) diameter
oak tree, 1.8 feet (0.5 m) SW of a tin shed/garage building, and 1.3 feet   
(0.4 m) NW of a witness post with sign.  The bench mark is 0.4 foot (0.1 m)
above grade, brazed to a 4-foot (1 m) long, 2-inch copper pipe encased in
concrete.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                   PUBLICATION DATE:  11/13/1990
Station ID: 8664878                                SUPERCEDED DATE:   04/21/2003
Name:       OLD CAPERS BACK LANDING, CAPERS ISLAND, SANTEE PAS
            SOUTH CAROLINA
NOAA Chart: 11521                                  Latitude:         32° 52.2' N
USGS Quad:  CAPERS INLET4                          Longitude:        79° 41.2' W


                            T I D A L   D A T U M S 


Tidal datums at OLD CAPERS BACK LANDING, CAPERS ISLAND, SANTEE PAS based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           OCTOBER 1975
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:  8664941 CAPERS CREEK


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

     HIGHEST OBSERVED WATER LEVEL (10/05/1975)         =   7.49
     MEAN HIGHER HIGH WATER                     MHHW   =   5.55
     MEAN HIGH WATER                            MHW    =   5.16
     MEAN TIDE LEVEL                            MTL    =   2.67
     MEAN LOW WATER                             MLW    =   0.18
     MEAN LOWER LOW WATER                       MLLW   =   0.00
     LOWEST  OBSERVED WATER LEVEL (10/07/1975)         =  -0.12



Bench Mark Elevation Information                In FEET above:

     Stamping or Designation                    MLLW        MHW

     OCL NO 1 1975                               6.80      1.64
     OCL NO 2 1975                               5.89      0.73
     OCL NO 3 1975                               6.44      1.28
     OCL NO 4 1975                               8.47      3.31
     OCL NO 5 1975                               8.02      2.86


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

                                                   PUBLICATION DATE:  11/13/1990
Station ID: 8664878                                SUPERCEDED DATE:   04/21/2003
Name:       OLD CAPERS BACK LANDING, CAPERS ISLAND, SANTEE PAS
            SOUTH CAROLINA
NOAA Chart: 11521                                  Latitude:         32° 52.2' N
USGS Quad:  CAPERS INLET4                          Longitude:        79° 41.2' 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 (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.