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

                                                                                
Station ID: 8419399                         PUBLICATION DATE:  05/20/2004
Name:       CAPE NEDDICK                                      
            ME
NOAA Chart: 13283                           Latitude:   43° 10.0' N (  43.16670)
USGS Quad:  YORK BEACH                      Longitude:  70° 35.6' W ( -70.59330)


To reach the tidal bench marks from the intersection of U.S. Highways 1 and 1A
in York Village, proceed SE then north on U.S. Highway 1A to Cape Neddick, then
turn rigth and proceed SE on Nubble Road to Sohier Park on the easternmost point
of Cape Neddick.  The bench marks are located in the area around the park.  The
tide gage and staff were north of the northernmost of two telescope observation
platforms in the park.


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


                 PRIMARY BENCH MARK STAMPING:  9399 A 1976
                         DESIGNATION:          841 9399 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         1954
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete platform                     OPUS PID:        
LATITUDE:   43° 10.0' N (  43.16670)          LONGITUDE:  70° 35.6' W ( -70.59330)


The primary bench mark is a disk set in the northernmost of two telescope
observation platforms in the park, 61 m (200 ft) south of the north shoreline,
and north of the dirt roads.



                         BENCH MARK STAMPING:  9399 B 1976
                         DESIGNATION:          841 9399 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         1955
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Rock outcrop                          OPUS PID:        
LATITUDE:   43° 10.0' N (  43.16670)          LONGITUDE:  70° 35.6' W ( -70.59330)


The bench mark is a disk set in a rock outcrop at the easternmost point of
Sohier Park, 46 m (150 ft) east of the northernmost of two telescope observation
platforms in the park, 30 m (100 ft) south of the north shoreline, and 6 m (20
ft) west of the utility pole leading to the Cape Neddick Light.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                                                
Station ID: 8419399                         PUBLICATION DATE:  05/20/2004
Name:       CAPE NEDDICK                                      
            ME
NOAA Chart: 13283                           Latitude:   43° 10.0' N (  43.16670)
USGS Quad:  YORK BEACH                      Longitude:  70° 35.6' W ( -70.59330)


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


                         BENCH MARK STAMPING:  9399 C 1976
                         DESIGNATION:          841 9399 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         1956
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Bedrock                               OPUS PID:        
LATITUDE:   43° 10.0' N (  43.16670)          LONGITUDE:  70° 35.6' W ( -70.59330)


The bench mark is a disk set in bedrock on the SE side of the parking lot at
Sohier Park, 1 m (2 ft) SW of the southernmost of two telescope observation
platforms in the park.



                         BENCH MARK STAMPING:  9399 D 1976
                         DESIGNATION:          841 9399 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         1957
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Rock                                  OPUS PID:        
LATITUDE:   43° 10.0' N (  43.16670)          LONGITUDE:  70° 35.6' W ( -70.59330)


The bench mark is a disk set in rock, 33 m (108 ft) north of the centerline of
the northernmost dirt road in Sohier Park, 30 m (100 ft) south of the north
shoreline, and 8 m (25 ft) NE of Fox's Lobster House Restaurant and Lounge.

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

                                                                                
Station ID: 8419399                         PUBLICATION DATE:  05/20/2004
Name:       CAPE NEDDICK                                      
            ME
NOAA Chart: 13283                           Latitude:   43° 10.0' N (  43.16670)
USGS Quad:  YORK BEACH                      Longitude:  70° 35.6' W ( -70.59330)


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


                         BENCH MARK STAMPING:  9399 E 1976
                         DESIGNATION:          841 9399 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         1958
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Rock                                  OPUS PID:        
LATITUDE:   43° 10.0' N (  43.16670)          LONGITUDE:  70° 35.6' W ( -70.59330)


The bench mark is a disk set in rock, 76 m (250 ft) east of the NE corner of
Fox's Lobster House Restaurant and Lounge, 46 m (150 ft) south of the north
shoreline, 37 m (120 ft) west of the northernmost of two telescope observation
platforms in the park, and 15 m (50 ft) north of the centerline of the
northernmost dirt road in Sohier Park.

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

                                                                                
Station ID: 8419399                         PUBLICATION DATE:  05/20/2004
Name:       CAPE NEDDICK                                      
            ME
NOAA Chart: 13283                           Latitude:   43° 10.0' N (  43.16670)
USGS Quad:  YORK BEACH                      Longitude:  70° 35.6' W ( -70.59330)


                            T I D A L   D A T U M S 


Tidal datums at CAPE NEDDICK based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           September 1976 - September 1976
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8418150 PORTLAND, CASCO BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  2.884
     MEAN HIGH WATER                            MHW    =  2.752
     MEAN SEA LEVEL                             MSL    =  1.437
     MEAN TIDE LEVEL                            MTL    =  1.427
     MEAN LOW WATER                             MLW    =  0.102
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     9399 A 1976                                 8.754    6.002
     9399 B 1976                                 6.907    4.155
     9399 C 1976                                 8.639    5.887
     9399 D 1976                                 5.345    2.593
     9399 E 1976                                 6.172    3.420


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

                                                                                
Station ID: 8419399                         PUBLICATION DATE:  05/20/2004
Name:       CAPE NEDDICK                                      
            ME
NOAA Chart: 13283                           Latitude:   43° 10.0' N (  43.16670)
USGS Quad:  YORK BEACH                      Longitude:  70° 35.6' W ( -70.59330)


                             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.