Bench Mark Sheet for 8656612, CALICO JACKS MARINA, HARKERS ISLAND NC

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  6

                                                                                
Station ID: 8656612                         PUBLICATION DATE:  09/29/2004
Name:       CALICO JACKS MARINA                               
            NC
NOAA Chart: 11545                           Latitude:   34° 41.2' N (  34.68670)
USGS Quad:  HARKERS ISLAND                  Longitude:  76° 32.0' W ( -76.53330)


To reach the bench marks proceed 2.6 km (1.6 mi) SE along County Road NO. 1335
from Hakers Island, at Shell Island.  The bench marks are located near Shell
Point at Hakers Island. 


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


                 PRIMARY BENCH MARK STAMPING:  NO 1 1973
                         DESIGNATION:          865 6612 TIDAL 1

MONUMENTATION:           Tidal Station disk                    VM#:        14971
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete slab                         OPUS PID:        
LATITUDE:   34° 41.2' N (  34.68670)          LONGITUDE:  76° 32.0' W ( -76.53330)


The bench mark is a disk set in the SE corner of a concrete slab with a 76 sign,
2.01 km (1.25 mi) SE along County Road 1335 from Harkers Island School, 5.18 m
(17.0 ft) west of the NW corner of Calico Jacks Marina Office, 1.83 m (6.0 ft)
east of the east wall of a boat ramp, and 0.06 m (0.2 ft) NW of the end of a
road at Shell Point.



                         BENCH MARK STAMPING:  NO 2 1973
                         DESIGNATION:          865 6612 TIDAL 2

MONUMENTATION:           Tidal Station disk                    VM#:        14972
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete metal porch                  OPUS PID#: BBCJ59
LATITUDE:   34° 41.2' N (  34.68670)          LONGITUDE:  76° 32.0' W ( -76.53330)


The bench mark is a disk set flush on top of a concrete metal porch, 1.9 km (1.2
mi) SE along County Road 1335 from Harkers Island School, 0.5 km (0.3 mi) NW of
the end of the end of a road at Shell Point, 9.88 m (32.4 ft) SW of the
centerline of the road, 0.24 m (0.8 ft) west of the north corner of a motel
building, and 0.3 m (1 ft) above ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 8656612                         PUBLICATION DATE:  09/29/2004
Name:       CALICO JACKS MARINA                               
            NC
NOAA Chart: 11545                           Latitude:   34° 41.2' N (  34.68670)
USGS Quad:  HARKERS ISLAND                  Longitude:  76° 32.0' W ( -76.53330)


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


                         BENCH MARK STAMPING:  SAM 3 1962
                         DESIGNATION:          SAM 3

MONUMENTATION:           Triangulation Station disk            VM#:        14974
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  EA0275
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   34° 41.0' N (  34.68330)          LONGITUDE:  76° 31.6' W ( -76.52670)


The bench mark is a disk set in a square concrete monument, 2.5 km (1.6 mi) SE
along County Road 1335 from Harkers Island School, 40.39 m (132.5 ft) west of
and across the road from the west porch corner of the Shell Point Restaurant,
7.62 m (25.0 ft) SW of the centerline of the road, and 0.46 m (1.5 ft) NE of a
wooden witness post.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 8656612                         PUBLICATION DATE:  09/29/2004
Name:       CALICO JACKS MARINA                               
            NC
NOAA Chart: 11545                           Latitude:   34° 41.2' N (  34.68670)
USGS Quad:  HARKERS ISLAND                  Longitude:  76° 32.0' W ( -76.53330)


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


                         BENCH MARK STAMPING:  SAM 3 1962 NO 6
                         DESIGNATION:          SAM 3 RM 6

MONUMENTATION:           Reference Mark disk                   VM#:        14975
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  EA0274
SETTING CLASSIFICATION:  Concrete post                         OPUS PID:        
LATITUDE:   34° 41.1' N (  34.68500)          LONGITUDE:  76° 31.6' W ( -76.52670)


The bench mark is a disk set in the top of a concrete post, 2.6 km (1.6 mi) SE
along County Road 1335 from Harkers Island School, near the end of the road at
Shell Point, 54.10 m (177.5 ft) WNW of and across the road from the NW porch
corner of the Shell Point Restaurant, 24.02 m (78.8 ft) SW of the west corner of
a concrete block building, 6.34 m (20.8 ft) SW of the centerline of the road,
and 0.46 m (1.5 ft) SW of the board fence.



                         BENCH MARK STAMPING:  SAM 3 1962 NO 7
                         DESIGNATION:           SAM 3 RM 7

MONUMENTATION:           Reference Mark disk                   VM#:        14976
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  EA0277
SETTING CLASSIFICATION:  Concrete post                         OPUS PID:        
LATITUDE:   34° 41.1' N (  34.68500)          LONGITUDE:  76° 31.6' W ( -76.52670)


The bench mark is a disk set in the top of a concrete post, 28.50 m (93.5 ft)
west of and across the road from the west porch corner of the Shell Point
Restaurant, 6.40 m (21.0 ft) SW of the centerline of the road, and 0.46 m (1.5
ft) SW of a board fence.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 8656612                         PUBLICATION DATE:  09/29/2004
Name:       CALICO JACKS MARINA                               
            NC
NOAA Chart: 11545                           Latitude:   34° 41.2' N (  34.68670)
USGS Quad:  HARKERS ISLAND                  Longitude:  76° 32.0' W ( -76.53330)


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


                         BENCH MARK STAMPING:  W 163 1963
                         DESIGNATION:          W 163

MONUMENTATION:           Bench Mark disk                       VM#:        14978
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  EA0276
SETTING CLASSIFICATION:  Copper clad steel rod                 OPUS PID:        
LATITUDE:   34° 41.1' N (  34.68500)          LONGITUDE:  76° 31.6' W ( -76.52670)


The bench mark is a disk, 29.57 m (97.0 ft) NW of the west porch corner of Shell
Point Restaurant, near the west corner of the parking lot, 9.30 m (30.5 ft) NE
of the centerline of the road, 1.07 m (3.5 ft) SW of power pole No. 289, 0.46 m
(1.5 ft) NW of a wooden witness post, and 0.3 m (1 ft) west of the end of a
wooden fence. The bench mark is set 6 cm (0.2 ft) above the ground, crimped to a
copper-clad steel rod driven 17.1 m (56 ft).

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 8656612                         PUBLICATION DATE:  09/29/2004
Name:       CALICO JACKS MARINA                               
            NC
NOAA Chart: 11545                           Latitude:   34° 41.2' N (  34.68670)
USGS Quad:  HARKERS ISLAND                  Longitude:  76° 32.0' W ( -76.53330)


                            T I D A L   D A T U M S 


Tidal datums at CALICO JACKS MARINA based on:

     LENGTH OF SERIES:      5 MONTHS
     TIME PERIOD:           June 1977 - October 1977
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8656483 BEAUFORT, DUKE MARINE LAB


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.613
     MEAN HIGH WATER                            MHW    =  0.552
     North American Vertical Datum              NAVD88 =  0.388
     MEAN SEA LEVEL                             MSL    =  0.295
     MEAN TIDE LEVEL                            MTL    =  0.290
     MEAN LOW WATER                             MLW    =  0.029
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 1 1973                                   1.975    1.423
     NO 2 1973                                   2.320    1.768
     SAM 3 1962                                  1.079    0.527
     SAM 3 1962 NO 6                             1.211    0.659
     SAM 3 1962 NO 7                             0.963    0.411
     W 163 1963                                  1.358    0.806


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

                                                                                
Station ID: 8656612                         PUBLICATION DATE:  09/29/2004
Name:       CALICO JACKS MARINA                               
            NC
NOAA Chart: 11545                           Latitude:   34° 41.2' N (  34.68670)
USGS Quad:  HARKERS ISLAND                  Longitude:  76° 32.0' W ( -76.53330)


                             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.

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Products available at 8656612 CALICO JACKS MARINA, HARKERS ISLAND, NC