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Bench Mark Sheet for 8653215, RODANTHE, PAMLICO SOUND 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8653215                         PUBLICATION DATE:  06/09/2003
Name:       RODANTHE, PAMLICO SOUND                           
            NC
NOAA Chart: 12204                           Latitude:   35° 35.7' N (  35.59500)
USGS Quad:  RODANTHE                        Longitude:  75° 28.3' W ( -75.47170)


To reach the tidal bench marks from the Post Office in Rodanthe, proceed 0.6 km
(0.4 mi) north on State Highway 12 to the road leading to the old U.S. Coast
Guard slip (Joseph Midgett Road), then turn and proceed west along the road to
the slip.  The bench marks are near the slip, along State Highway 12, and at the
old U.S. Coast Guard Rescue Station.  The tide gage and staff were on the south
side of the slip.


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


                 PRIMARY BENCH MARK STAMPING:  865 3215 A 1977
                         DESIGNATION:          865 3215 A

MONUMENTATION:           Tidal Station disk                    VM#:         3544
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete post                         OPUS PID:        
LATITUDE:   35° 35.7' N (  35.59500)          LONGITUDE:  75° 28.3' W ( -75.47170)


The primary bench mark is a disk set in the top of an 8-inch concrete post,
22.89 m (75.1 ft) SSW of the SE corner of the old U.S. Coast Guard slip, 19.69 m
(64.6 ft) ESE of the SE corner of a fish house on the south side of the slip,
6.25 m (20.5 ft) west of the utility pole closest to the waters edge, and 0.15 m
(0.5 ft) above the ground.

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

                                                                                
Station ID: 8653215                         PUBLICATION DATE:  06/09/2003
Name:       RODANTHE, PAMLICO SOUND                           
            NC
NOAA Chart: 12204                           Latitude:   35° 35.7' N (  35.59500)
USGS Quad:  RODANTHE                        Longitude:  75° 28.3' W ( -75.47170)


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


                         BENCH MARK STAMPING:  RODAN 1962
                         DESIGNATION:          RODAN

MONUMENTATION:           Triangulation Station disk            VM#:         3543
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  EX0304
SETTING CLASSIFICATION:  galvanized steel pipe driven into groundOPUS PID:        
LATITUDE:   35° 35.7' N (  35.59500)          LONGITUDE:  75° 27.9' W ( -75.46500)


The bench mark is a disk located in the center of the foundation of an old
signal tower at the old U.S. Coast Guard Station, 44.29 m (145.3 ft) NE of the
SE corner of the main U.S. Coast Guard building, 40.84 m (134.0 ft) east of the
NE corner of the main building, 29.08 m (95.4 ft) WNW of the NW corner of the
building #314, 16.15 m (53.0 ft) south of the sand track road, and 1.04 m (3.4
ft) south of a metal witness post.  The bench mark is set 15 cm (0.5 ft) above
the ground, crimped to the top of a copper weld rod driven 7.3 m (23.9 ft), and
encased in a 2-inch galvanized steel pipe.



                         BENCH MARK STAMPING:  865 3215 B 1977
                         DESIGNATION:          865 3215 B

MONUMENTATION:           Tidal Station disk                    VM#:         3545
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete septic tank                  OPUS PID:        
LATITUDE:   35° 35.7' N (  35.59500)          LONGITUDE:  75° 28.3' W ( -75.47170)


The bench mark is a disk set flush in a drill hole in the NW corner of the
concrete top of a septic tank for a community building located WSW of the
intersection of State Highway 12 and the road leading to the old U.S. Coast
Guard slip, 3.44 m (11.3 ft) NW of the NW corner of the community building, 0.30
m (1.0 ft) south of the north edge of the septic tank, 0.30 m (1.0 ft) east of
the west edge of the septic tank, and 0.46 m (1.5 ft) above the ground.

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

                                                                                
Station ID: 8653215                         PUBLICATION DATE:  06/09/2003
Name:       RODANTHE, PAMLICO SOUND                           
            NC
NOAA Chart: 12204                           Latitude:   35° 35.7' N (  35.59500)
USGS Quad:  RODANTHE                        Longitude:  75° 28.3' W ( -75.47170)


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


                         BENCH MARK STAMPING:  865 3215 C 1977
                         DESIGNATION:          865 3215 C

MONUMENTATION:           Tidal Station disk                    VM#:         3546
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete post                         OPUS PID:        
LATITUDE:   35° 35.7' N (  35.59500)          LONGITUDE:  75° 28.3' W ( -75.47170)


The bench mark is a disk set in the top of an 8-inch concrete post located SSE
of the intersection of State Highway 12 and the road to the old U.S. Coast Guard
slip, 16 m (53 ft) ESE of the centerline of State Highway 12, 7.38 m (24.2 ft)
east of a historical marker, 1.43 m (4.7 ft) south and in line with the west
face of the SW corner of the westernmost of three storage garages, and 0.15 m
(0.5 ft) above the ground.

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

                                                                                
Station ID: 8653215                         PUBLICATION DATE:  06/09/2003
Name:       RODANTHE, PAMLICO SOUND                           
            NC
NOAA Chart: 12204                           Latitude:   35° 35.7' N (  35.59500)
USGS Quad:  RODANTHE                        Longitude:  75° 28.3' W ( -75.47170)


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


                         BENCH MARK STAMPING:  C 194 1977
                         DESIGNATION:          C 194

MONUMENTATION:           Vertical Control disk                 VM#:         3547
AGENCY:                  National Geodetic Survey (NGS)        IDB PID#:  EX0211
SETTING CLASSIFICATION:  Steel rod with base plate driven into
                         ground                                OPUS PID:        
LATITUDE:   35° 35.6' N (  35.59330)          LONGITUDE:  75° 28.1' W ( -75.46830)


The bench mark is a disk located SSW of the intersection of State Highway 12 and
the road leading to the old U.S. Coast Guard slip, 35.81 m (117.5 ft) NNE of the
NE corner of a gift shop and motel, 20.76 m (68.1 ft) WNW of utility pole #540,
12.04 m (39.5 ft) west of the centerline of State Highway 12, and 5.73 m (18.8
ft) NE of utility pole #355.  The bench mark is set 20 cm (0.7 ft) above the
ground, crimped to the top of a steel rod driven 1.2 m (3.9 ft), and encased in
a PVC pipe and concrete kickblock.

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

                                                                                
Station ID: 8653215                         PUBLICATION DATE:  06/09/2003
Name:       RODANTHE, PAMLICO SOUND                           
            NC
NOAA Chart: 12204                           Latitude:   35° 35.7' N (  35.59500)
USGS Quad:  RODANTHE                        Longitude:  75° 28.3' W ( -75.47170)


                            T I D A L   D A T U M S 


Tidal datums at RODANTHE, PAMLICO SOUND based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           December 1977 - January 1978
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8652587 OREGON INLET MARINA, PAMLICO SOUND


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.299
     MEAN HIGH WATER                            MHW    =  0.246
     North American Vertical Datum              NAVD88 =  0.139
     MEAN TIDE LEVEL                            MTL    =  0.136
     MEAN SEA LEVEL                             MSL    =  0.131
     MEAN LOW WATER                             MLW    =  0.026
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     865 3215 A 1977                             0.869    0.623
     RODAN 1962                                  1.886    1.640
     865 3215 B 1977                             1.737    1.491
     865 3215 C 1977                             1.318    1.072
     C 194 1977                                  1.434    1.188


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

                                                                                
Station ID: 8653215                         PUBLICATION DATE:  06/09/2003
Name:       RODANTHE, PAMLICO SOUND                           
            NC
NOAA Chart: 12204                           Latitude:   35° 35.7' N (  35.59500)
USGS Quad:  RODANTHE                        Longitude:  75° 28.3' W ( -75.47170)


                             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 8653215 RODANTHE, PAMLICO SOUND, NC

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services